[ 일반 ] 정규식 (Regular Expression)에 대한 간단 정리

<span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">유독 머리에 제 자리를 잡지 못하는 것들 중에 하나인 정규 표현식 (Reqular Expression) 을 또 써야할 상황이 발생해서 다시 한번 정리를 해 놓는다. (언젠가 또 멍청하게 까먹고 다시 정리한다고 하겠지만.. 쩝)</span><br /> <br /> <span style="color: #7820b9; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 11pt;"><b>확장자 검증하기 (샘플)</b></span><br /> <br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">우선  사용하려고 하는 실제 사례에 대한 의미를 확인해 보도록 하자. </span></span><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">실제 적용하여야 하는 부분은 특정한 문자열 (URL, File Path 등...) 에서 이미지 확장자를 제거하는 부분이다. 쉽게 사용할 수 있는 정규식은 다음과 같이 적용이 가능하다.</span><br /> <br /> <pre class="java" style="background-color: #f7f7f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 0px; border-top-right-radius: 0px; border: 1px solid rgb(209, 209, 232); color: #333333; font-size: 13px; line-height: 1.5; margin-bottom: 20px; margin-top: 0px; overflow-x: auto; padding: 10px;"><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">[</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">^</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">\s</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">]</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">+</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">\.</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">?</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">i</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">jpg</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">|</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">png</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">|</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">gif</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">|</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">bmp</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">$</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span></pre> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">위의 정규식을 이해하기 위해서 하나씩 끌어내 보면 다음과 같이 해석할 수 있다.</span><br /> <br /> <pre class="java" style="background-color: #f7f7f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 0px; border-top-right-radius: 0px; border: 1px solid rgb(209, 209, 232); color: #333333; font-size: 13px; line-height: 1.5; margin-bottom: 20px; margin-top: 0px; overflow-x: auto; padding: 10px;"><div style="margin-left: 0px;"> <span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">( </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 1의 시작</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">[</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">^</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">\s</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">]</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">+ </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 공백을 제외한 하나 또는 그 이상의 문자열이 존재하여야 한다는 조건</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">( </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 2의 시작</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> \. # '.' 문자</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">?</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">i</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">) </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 이후의 문자들에 대해서 대/소문자를 무시</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">( </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 3의 시작</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> jpg # 'jpg' 문자 포함</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">| </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 또는</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> png # 'png' 문자 포함</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">| </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 또는</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> gif # 'gif' 문자 포함</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">| </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 또는</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> bmp # 'bmp' 문자 포함</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">) </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 3의 종료</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">) </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 2의 종료</span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> $ # 문자열 종료 </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">) </span><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"># 그룹 1의 종료</span></div> </pre> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">위의 내용은 "공백이 아닌 최소한 하나 이상의 문자열을 대상으로 '.' 문자 이후에 'jpg', 'png', 'gif', 'bmp' 문자가 포함된 것들을 대/소문자 구분 없이 찾는다" 라는 것이다. 더 많은 조건을 넣으려면 '|' 문자와 대상으로 할 문자를 더 추가하면 된다.</span><br /> <br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">실제 코드에서 사용하는 방법은 아래의 예제와 같다.</span><br /> <br /> <pre class="java" style="background-color: #f7f7f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 0px; border-top-right-radius: 0px; border: 1px solid rgb(209, 209, 232); font-size: 13px; line-height: 1.5; margin-bottom: 20px; margin-top: 0px; overflow-x: auto; padding: 10px;"><span style="color: #333333; font-family: 나눔고딕코딩, NanumGothicCoding;"><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">package</span> </span><span style="color: #006699;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">com.msfl.study.regex</span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">import</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #006699; font-family: 나눔고딕코딩, NanumGothicCoding;">java.util.regex.Matcher</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"> </span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">import</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #006699; font-family: 나눔고딕코딩, NanumGothicCoding;">java.util.regex.Pattern</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">public</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">class</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> ExtensionsValidator </span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">{</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">private</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> Pattern pattern</span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">private</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> Matcher matcher</span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">private</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">static</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">final</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #003399; font-family: 나눔고딕코딩, NanumGothicCoding;">String</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> EXTENSION_PATTERN </span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">=</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: blue; font-family: 나눔고딕코딩, NanumGothicCoding;">"([^<span style="color: #000099; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">\\</span>s]+(<span style="color: #000099; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">\\</span>.(?i)(jpg|png|gif|bmp))$)"</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">public</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #333333; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">ExtensionsValidator </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">(</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">)</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">{</span> <span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> this.pattern </span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">=</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> Pattern.</span></span><span style="color: #006633; font-family: 나눔고딕코딩, NanumGothicCoding;">compile</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #333333; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">EXTENSION_PATTERN</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">)</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding; line-height: 1.5;">;</span> <span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">}</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   </span></span><span style="color: green; font-family: 나눔고딕코딩, NanumGothicCoding; font-style: italic; font-weight: bold;">/** * 파라미터로 전달된 문자열을 정규표현식을 통해서 검사하고 * 지정한 확장자 패턴에 맞으면 true, 아니면 false 를 반환한다. */</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">public</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #000066; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">boolean</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> validate</span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">final</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: #003399; font-family: 나눔고딕코딩, NanumGothicCoding;">String</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> target</span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">{</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">   matcher </span></span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">=</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> pattern.</span></span><span style="color: #006633; font-family: 나눔고딕코딩, NanumGothicCoding;">matcher</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">target</span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> </span></span><span style="color: black; font-family: 나눔고딕코딩, NanumGothicCoding; font-weight: bold;">return</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;"> matcher.</span></span><span style="color: #006633; font-family: 나눔고딕코딩, NanumGothicCoding;">matches</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">(</span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">)</span><span style="color: #339933; font-family: 나눔고딕코딩, NanumGothicCoding;">;</span><span style="color: #333333;"><span style="font-family: 나눔고딕코딩, NanumGothicCoding;">  </span></span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">}</span><span style="color: #333333;"> </span><span style="color: #009900; font-family: 나눔고딕코딩, NanumGothicCoding;">}</span></pre> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">위의 자바 코드는 정규표현식으로 확장자를 검사하는 아주 간단한 클래스로 validate 메서드를 호출해서 지정한 확장자가 포함되었는지를 검사하는 것이다. 이 반환 결과를 통해서 필요한 로직을 처리하면 된다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: #7820b9; font-size: 11pt;"><b>정규 표현식?</b></span></span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정규 표현식이 필요한 이유는 너무나 많다. 어떤 규칙성을 가지는 문자열에 대한 검증이 필요하다면 거의 대부분 적용이 필요하다고 생각하면 된다. 데이터 검증 뿐만 아니라 필요한 포맷에 맞도록 입력을 유도하는 경우에도 사용하면 쉽게 구현이 가능하다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정규 표현식은 사전적인 의미로 정의를 하면 "특정한 규칙을 가진 문자열의 집합을 표현하는데 사용하는 형식 언어" 가 된다. 주로 프로그래밍 언어나 텍스트 에디터 등에서 문자열의 치환이나 검색등의 용도로 많이 사용되고 있다. 그런데 쉽게 접근을 허용하지 않는 도도함은 바로 지랄맞게 가독성이 떨어지는 표현식과 의미라고 할 수 있다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정규 표현식의 표준은 POSIX 표현식과 이를 기반으로 확장된 Perl 방식의 PCRE 가 존재한다. 물론 더 많은 표현식들이 존재하지만 실제 약간의 차이점만 존재할 뿐  실제 사용하는 규칙들은 거의 비슷하다고 생각하면 된다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: #7820b9; font-size: 11pt;"><b>정규 표현식의 용어들</b></span></span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정규 표현식에서 사용되는 기호를 Meta문자라고  표현한다. 표현식에서 내부적으로 특정 의미를 가지는 문자를 말하며 간단하게 정리하면 아래의 표와 같다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"></span><br /> <!-- Not Allowed Attribute Filtered ( se2_tbl_template="15") --><br /> <table border="0" cellpadding="0" cellspacing="1" class="__se_tbl" style="background-color: #a6bcd1;"><tbody> <tr><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> 표현식</span></div> </td><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 620px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">의미 </span></div> </td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: red;">^</span>x</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">문자열의 시작을 표현하며 x 문자로 시작됨을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">x<span style="color: red;">$</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">문자열의 종료를 표현하며 x 문자로 종료됨을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: red;"> .</span>x</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">임의의 한 문자의 자리수를 표현하며 문자열이 x 로 끝난다는 것을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">+</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">반복을 표현하며 x 문자가 한번 이상 반복됨을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">?</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> 존재여부를 표현하며 x 문자가 존재할 수도, 존재하지 않을 수도 있음을 의미한다.</span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">*</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">반복여부를 표현하며 x 문자가 0번 또는 그 이상 반복됨을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">|</span>y</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">or 를 표현하며 x 또는 y 문자가 존재함을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 5px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: red;">(</span>x<span style="color: red;">)</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 364px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">그룹을 표현하며 x 를 그룹으로 처리함을 의미한다.</span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 105px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: red;">(</span>x<span style="color: red;">)(</span>y<span style="color: red;">)</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 620px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">그룹들의 집합을 표현하며 앞에서 부터 순서대로 번호를 부여하여 관리하고 x, y 는 각 그룹의 데이터로 관리된다.</span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 5px; padding: 3px 4px 2px; text-align: left; width: 5px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> (x)(<span style="color: red;">?:</span>y)</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; height: 5px; padding: 3px 4px 2px; width: 5px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">그룹들의 집합에 대한 예외를 표현하며 그룹 집합으로 관리되지 않음을 의미한다. </span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">{n}</span></span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">반복을 표현하며 x 문자가 n번 반복됨을 의미한다.</span></span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 5px; padding: 3px 4px 2px; text-align: left; width: 5px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">{n,}</span></span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; height: 5px; padding: 3px 4px 2px; width: 5px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">반복을 표현하며 x 문자가 n번 이상 반복됨을 의미한다.</span></span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> x<span style="color: red;">{n,m}</span></span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> <span style="color: black;">반복을 표현하며 x 문자가 최소 n번 이상 최대 m 번 이하로 반복됨을 의미한다.</span></span></td></tr> </tbody></table> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">Meta 문자들 중에서 좀 더 특수하게 사용되는 문자들이 존재한다. '[]' 는 내부에 지정된 문자열의 범위 중에서 한 문자만을 선택하다는 특수한 의미를 가진다. 그리고 내부에서 Meta문자를 사용하면 다른 의미를 가지고 동작할 수 있으므로 잘 확인하고 사용해야 한다. 좀 더 특별한 용도로 사용되는 것들은 아래의 표와 같다. </span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"></span><br /> <!-- Not Allowed Attribute Filtered ( se2_tbl_template="15") --><br /> <table border="0" cellpadding="0" cellspacing="1" class="__se_tbl" style="background-color: #a6bcd1;"><tbody> <tr><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> 표현식</span></div> </td><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 619px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">의미 </span></div> </td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"><span style="color: red; font-size: 9pt;">[</span>xy<span style="color: red; font-size: 9pt;">]</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">문자 선택을 표현하며 x 와 y 중에 하나를 의미한다.</span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> [<span style="color: red; font-size: 9pt;">^</span>xy]</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">not 을 표현하며  x 및 y 를 제외한 문자를 의미한다.</span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> [x<span style="color: red; font-size: 9pt;">-</span>z]</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">range를 표현하며 x ~ z 사이의 문자를 의미한다. </span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> <span style="color: red; font-size: 9pt;">\^</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">escape 를 표현하며 ^ 를 문자로 사용함을 의미한다.</span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> <span style="color: red; font-size: 9pt;">\b</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black; font-size: 9pt;">word boundary를 표현하며 문자와 공백사이의 문자를 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> <span style="color: red; font-size: 9pt;">\B</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black; font-size: 9pt;">non word boundary를 표현하며 문자와 공백사이가 아닌 문자를 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \d</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">digit 를 표현하며 숫자를 의미한다. </span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> <span style="color: red; font-size: 9pt;">\D</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">non digit 를 표현하며 숫자가 아닌 것을 의미한다. </span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 106px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> <span style="color: red; font-size: 9pt;">\s</span></span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">space 를 표현하며 공백 문자를 의미한다. </span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \S</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black;">non space를 표현하며 공백 문자가 아닌 것을 의미한다.</span></span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \t</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black;">tab 을 표현하며 탭 문자를 의미한다.</span></span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \v</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black;">vertical tab을 표현하며 수직 탭(?) 문자를 의미한다.</span></span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \w</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">word 를 표현하며 알파벳 + 숫자 + _ 중의 한 문자임을 의미한다. </span></td></tr> <tr><td class="" colspan="1" rowspan="1" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; padding: 3px 4px 2px; text-align: left;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;"> \W</span></div> </td><td class="" colspan="1" rowspan="1" style="background-color: white; color: #3d76ab; padding: 3px 4px 2px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; font-size: 9pt;">non word를 표현하며 알파벳 + 숫자 + _ 가 아닌 문자를 의미한다. </span></td></tr> </tbody></table> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정규표현식을 사용할 때 Flag 라는 것이 존재하는데 Flag를 사용하지 않으면 문자열에 대해서 검색을 한번만 처리하고 종료하게 된다. Flag는 다음과 같은 것들이 존재한다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"></span><br /> <!-- Not Allowed Attribute Filtered ( se2_tbl_template="15") --><br /> <table border="0" cellpadding="0" cellspacing="1" class="__se_tbl" style="background-color: #a6bcd1;"><tbody> <tr><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 103px;"><div style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> Flag</span></div> </td><td class="" style="background-color: #6284ab; color: white; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 619px;"><div align="center" style="text-align: center;"> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">의미 </span></div> </td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 103px;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> g</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">Global 의 표현하며 대상 문자열내에 모든 패턴들을 검색하는 것을 의미한다. </span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 103px;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> i</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: black;">Ignore case 를 표현하며 대상 문자열에 대해서 대/소문자를 식별하지 않는 것을 의미한다.</span></span></td></tr> <tr><td class="" style="background-color: #f6f8fa; color: #3d76ab; font-weight: normal; height: 18px; padding: 3px 4px 2px; text-align: left; width: 103px;"><div align="center" style="text-align: center;"> <span style="color: red; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"> m</span></div> </td><td class="" style="background-color: white; color: #3d76ab; height: 18px; padding: 3px 4px 2px; width: 619px;"><span style="color: black; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">Multi line을 표현하며 대상 문자열이 다중 라인의 문자열인 경우에도 검색하는 것을 의미한다. </span></td></tr> </tbody></table> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="color: #7820b9; font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="font-size: 15px; line-height: 22px;"><b>몇 가지 사례들</b></span></span><br /> <br /> <ul> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">한글 코드 (단순) - /[ㄱ-ㅎ|ㅏ-ㅣ|가-힣]/ 로 구성이 가능하다. 단, 한글 문제는 단순하지 않으므로 좀 더 좋은 방법을 찾는 것이 좋다.</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">숫자 - /[0-9]/g</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">이메일 - /^[0-9a-zA-Z]([-_\.]?[0-9a-zA-Z])*@[0-9a-zA-Z]([-_\.]?[0-9a-zA-Z])*\.[a-zA-Z]{2,3}$/i</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">모든 공백 - /\s/g</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">전화번호 - /^\d{3}-\d{3,4}-\d{4}$/</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">핸드폰 번호 - /^01([0|1|6|7|8|9]?)-?([0-9]{3,4})-?([0-9]{4})$/</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">URL - ^(https?):\/\/([^:\/\s]+)(:([^\/]*))?((\/[^\s/\/]+)*)?\/?([^#\s\?]*)(\?([^#\s]*))?(#(\w*))?$</span></li> </ul> <br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">위의 사례들이 정답이라고 할 수는 없다. 상황에 따라서 위의 기본적인 정규식에 필요한 부분들을 첨삭하여 사용하면 될 듯 하다.</span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><span style="color: #7820b9; font-size: 11pt;"><b>참고사항</b></span></span><br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><br /></span> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">정리는 하기는 했지만 실제로 사용하기 위해서는 여러 가지로 변경해 가며 테스트를 해 봐야 한다. 그런데 딱히 정규식을 테스트할만한 도구가 없다. 유용하게 사용할 수 있는 툴들이 제공되는 사이트로 많이 사용하는 것들은 다음과 같다.</span><br /> <br /> <ul> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><a class="con_link" href="http://gskinner.com/RegExr/" target="_blank">http://gskinner.com/RegExr/</a> - 정규 표현식에 대한 설명들을 볼 수 있고, 정보들을 확인할 수 있다.</span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;"><a class="con_link" href="http://www.regexper.com/" target="_blank">http://www.regexper.com/</a> - 정규 표현식을 작성하면 이해하기 쉽도록 도식화해서 보여준다.</span></li> </ul> <br /> <span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF;">그 외에도 상당히 많은 사이트들이 정규 표현식을 정리하여 소개하고 있다.</span><br /> <br /> <ul> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">정규표현식 – wiki백과 : <a class="con_link" href="http://ko.wikipedia.org/wiki/%EC%A0%95%EA%B7%9C%ED%91%9C%ED%98%84%EC%8B%9D" target="_blank">http://ko.wikipedia.org/wiki/정규표현식</a></span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">정규표현식의 기본 문법 정리표 : <a class="con_link" href="http://blog.daum.net/creazier/15309380" target="_blank">http://blog.daum.net/creazier/15309380</a></span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">정규표현식 사용하기 : <a class="con_link" href="http://icoon22.tistory.com/220" target="_blank">http://icoon22.tistory.com/220</a></span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">정규식이란 무엇인가 : <a class="con_link" href="http://twinstarbox.tistory.com/entry/Java-%EC%A0%95%EA%B7%9C%EC%8B%9D%EC%9D%B4%EB%9E%80-%EB%AC%B4%EC%97%87%EC%9D%B8%EA%B0%80" target="_blank">http://twinstarbox.tistory.com/entry/Java-정규식이란-무엇인가</a></span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">자바스크립트 정규 표현식 : <a class="con_link" href="http://yaku.tistory.com/75" target="_blank">http://yaku.tistory.com/75</a></span></li> <li><span style="font-family: 나눔바른고딕, NanumBarunGothic, NanumBarunGothicOTF; line-height: 1.5;">Perl 정규표현식, 메타데이타 :  <a class="con_link" href="http://blog.naver.com/PostView.nhnblogId=turtle1006&logNo=60107758671" target="_blank">http://blog.naver.com/PostView.nhnblogId=turtle1006&logNo=60107758671</a></span></li> </ul>