java HTML字符串正则表达式使用工具类

来源：互联网发布：淘宝体验中心编辑：程序博客网时间：2024/05/19 04:02
原文：java HTML字符串正则表达式使用工具类
代码下载地址：http://www.zuidaima.com/share/1550463453416448.htm
HTML相关的正则表达式工具类包括过滤HTML标记，转换HTML标记，替换特定HTML标记
package com.zuidaima.common.util;import java.util.regex.Matcher;  import java.util.regex.Pattern;    /**  * <p>  * Title: HTML相关的正则表达式工具类  * </p>  * <p>  * Description: 包括过滤HTML标记，转换HTML标记，替换特定HTML标记  * </p>  * <p>  * Copyright: Copyright (c) 2010  * </p> * @author tgl www.zuidaima.com * @version 1.0  * @createtime 2009-10-16  */    public class HtmlRegexpUtil {      private final static String regxpForHtml = "<([^>]*)>"; // 过滤所有以<开头以>结尾的标签    //    private final static String regxpForImgTag = "<\\s*img\\s+([^>]*)\\s*>"; // 找出IMG标签    //    private final static String regxpForImaTagSrcAttrib = "src=\"([^\"]+)\""; // 找出IMG标签的SRC属性        public static void main(String args[]){    String html = "<DIV>\n<DIV>内容提要测试\n<DIV>内容提要测试\n<DIV>内容提要测试\n<DIV>内容提要测试\n<DIV>内容提要测试\n<DIV>内容提要测试\n<DIV>内容提要测试</DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV>";        System.out.println(replaceTag(html));        }    /**      *       */      public HtmlRegexpUtil() {          // TODO Auto-generated constructor stub      }        /**      *       * 基本功能：替换标记以正常显示      * <p>      *       * @param input      * @return String      */      public static String replaceTag(String input) {          if (!hasSpecialChars(input)) {              return input;          }          StringBuffer filtered = new StringBuffer(input.length());          char c;          for (int i = 0; i <= input.length() - 1; i++) {              c = input.charAt(i);              switch (c) {              case '<':                  filtered.append("&lt;");                break;            case '>':                  filtered.append("&gt;");                  break;            case '"':                  filtered.append("&quot;");                break;              case '&':                  filtered.append("&amp;");                break;              default:                  filtered.append(c);              }            }          return (filtered.toString());      }        /**      *       * 基本功能：判断标记是否存在      * <p>      *       * @param input      * @return boolean      */      public static boolean hasSpecialChars(String input) {          boolean flag = false;          if ((input != null) && (input.length() > 0)) {              char c;              for (int i = 0; i <= input.length() - 1; i++) {                  c = input.charAt(i);                  switch (c) {                  case '>':                      flag = true;                      break;                  case '<':                      flag = true;                      break;                  case '"':                      flag = true;                      break;                  case '&':                      flag = true;                      break;                  }              }          }          return flag;      }        /**      *       * 基本功能：过滤所有以"<"开头以">"结尾的标签      * <p>      *       * @param str      * @return String      */      public static String filterHtml(String str) {          Pattern pattern = Pattern.compile(regxpForHtml);          Matcher matcher = pattern.matcher(str);          StringBuffer sb = new StringBuffer();          boolean result1 = matcher.find();          while (result1) {              matcher.appendReplacement(sb, "");              result1 = matcher.find();          }          matcher.appendTail(sb);          return sb.toString();      }        /**      *       * 基本功能：过滤指定标签      * <p>      *       * @param str      * @param tag      *            指定标签      * @return String      */      public static String fiterHtmlTag(String str, String tag) {          String regxp = "<\\s*" + tag + "\\s+([^>]*)\\s*>";          Pattern pattern = Pattern.compile(regxp);          Matcher matcher = pattern.matcher(str);          StringBuffer sb = new StringBuffer();          boolean result1 = matcher.find();          while (result1) {              matcher.appendReplacement(sb, "");              result1 = matcher.find();          }          matcher.appendTail(sb);          return sb.toString();      }        /**      *       * 基本功能：替换指定的标签      * <p>      *       * @param str      * @param beforeTag      *            要替换的标签      * @param tagAttrib      *            要替换的标签属性值      * @param startTag      *            新标签开始标记      * @param endTag      *            新标签结束标记      * @return String      * @如：替换img标签的src属性值为[img]属性值[/img]      */      public static String replaceHtmlTag(String str, String beforeTag,              String tagAttrib, String startTag, String endTag) {          String regxpForTag = "<\\s*" + beforeTag + "\\s+([^>]*)\\s*>";          String regxpForTagAttrib = tagAttrib + "=\"([^\"]+)\"";          Pattern patternForTag = Pattern.compile(regxpForTag);          Pattern patternForAttrib = Pattern.compile(regxpForTagAttrib);          Matcher matcherForTag = patternForTag.matcher(str);          StringBuffer sb = new StringBuffer();          boolean result = matcherForTag.find();          while (result) {              StringBuffer sbreplace = new StringBuffer();              Matcher matcherForAttrib = patternForAttrib.matcher(matcherForTag                      .group(1));              if (matcherForAttrib.find()) {                  matcherForAttrib.appendReplacement(sbreplace, startTag                          + matcherForAttrib.group(1) + endTag);              }              matcherForTag.appendReplacement(sb, sbreplace.toString());              result = matcherForTag.find();          }          matcherForTag.appendTail(sb);          return sb.toString();      }  }
0 0