时间：2021-07-01 10:21:17 帮助过：12人阅读
下面这是其中一项关于处理匹配内容替换的范例，
import java.util.regex.Pattern;import java.util.regex.Matcher;public class MatcherReplaceExample { public static void main(String[] args) { String text = "John writes about this, and John Doe writes about that," + " and John Wayne writes about everything." ; String patternString1 = "((John) (.+?)) "; Pattern pattern = Pattern.compile(patternString1); Matcher matcher = pattern.matcher(text); StringBuffer stringBuffer = new StringBuffer(); while(matcher.find()){ matcher.appendReplacement(stringBuffer, "Joe Blocks "); System.out.println(stringBuffer.toString()); } matcher.appendTail(stringBuffer); System.out.println(stringBuffer.toString()); }} 在这里和大家分享本人写的一个工具类，使用正则表达式处理一些常用html标签，这种标签其实可以定制，只需找出与其匹配的正则表达式，然后按照推荐处理方案去处理即可
package com.jieve.util;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * @ClassName: HtmlRegexpUtil * @Description: 处理html标签 * @author YYYong * @date 2016年5月18日 上午9:26:28 * */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 rexImgTag = "<(img.*?)(class.*?)(src.*?)>"; // 找出IMG标签 private final static String regExpTag = "<(img.*?)(src.*?)(alt.*?)(title.*?)(height.*?)>"; // 找出表情标签 private final static String regATag = "(<(a.*?href=.*?)>(.*?))"; // 找出标签 public final static String regSpanTag = "<(span.*?)(style.*?)>(.*?)"; // 找出标签 public final static String regStrongTag = "(<(a.*?href=.*?)>(.*?))"; // 找出标签 private final static String spanTagPre = ""; // 找出标签 private final static String spanTagSuf = ""; // 找出标签 private final static String strongTagPre = ""; // 找出标签 private final static String strongTagSuf = ""; // 找出标签 /** * @Title: handleImgTag * @Description: 处理IMG标签 * @param @param str * @param @param prefix * @param @param suffix * @param @return 设定文件 * @return String 返回类型 * @throws */ public static String handleImgTag(String str, String prefix, String suffix) { Pattern pattern = Pattern.compile(rexImgTag); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result = matcher.find(); while (result) { String temp = matcher.group(3); temp = temp.substring(6); matcher.appendReplacement(sb, prefix + temp.substring(0, temp.length() - 1) + suffix); result = matcher.find(); } matcher.appendTail(sb); return sb.toString(); } /** * @Title: handleExpTag * @Description: 处理表情标签 * @param @param str * @param @param prefix * @param @param suffix * @param @return 设定文件 * @return String 返回类型 * @throws */ public static String handleExpTag(String str, String prefix, String suffix) { Pattern pattern = Pattern.compile(regExpTag); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result = matcher.find(); while (result) { String temp = matcher.group(4); temp = temp.substring(7, temp.length() - 2); matcher.appendReplacement(sb, prefix + temp + suffix); result = matcher.find(); } matcher.appendTail(sb); return sb.toString(); } /** * @Title: handleATag * @Description: 处理标签 * @param @param str * @param @param prefix * @param @param suffix * @param @return 设定文件 * @return String 返回类型 * @throws */ public static String handleATag(String str, String prefix, String suffix) { Pattern pattern = Pattern.compile(regATag); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result = matcher.find(); while (result) { String temp = matcher.group(3); if(temp.startsWith("$")) { // $符号为正则特殊符号，需替换后再处理 temp = "[@@]" + temp.substring(1, temp.length() - 1) + "[@@]"; } matcher.appendReplacement(sb, prefix + temp + suffix); result = matcher.find(); } matcher.appendTail(sb); return sb.toString().replace("[@@]", "$"); } /** * @Title: removeTag * @Description: 移除标签 * @param @param str * @param @param tag * @param @return 设定文件 * @return String 返回类型 * @throws */ public static String removeTag(String str,String tag) { int count = 2; if(regSpanTag.equals(tag)) { count++; } Pattern pattern = Pattern.compile(tag); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result = matcher.find(); while (result) { String temp = matcher.group(count); matcher.appendReplacement(sb,temp); result = matcher.find(); } matcher.appendTail(sb); if(count == 2) { return sb.toString().replace(strongTagPre, "").replace(strongTagSuf, ""); } else { return sb.toString().replace(spanTagPre, "").replace(spanTagSuf, ""); } } /** * @Title: replaceTag * @Description: 替换标记以正常显示 * @param @param input * @param @return 设定文件 * @return String 返回类型 * @throws */ public 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("<"); break; case '>': filtered.append(">"); break; case '"': filtered.append("""); break; case '&': filtered.append("&"); break; default: filtered.append(c); } } return (filtered.toString()); } /** * @Title: hasSpecialChars * @Description: 判断标记是否存在 * @param @param input * @param @return 设定文件 * @return boolean 返回类型 * @throws */ public 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; } /** * @Title: filterHtml * @Description: 基本功能：过滤所有以"<"开头以">"结尾的标签 * @param @param str * @param @return 设定文件 * @return String 返回类型 * @throws */ 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(); } /** * @Title: fiterHtmlTag * @Description: 过滤指定标签 * @param @param str * @param @param tag * @param @return 设定文件 * @return String 返回类型 * @throws */ 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(); }} String content = "测试测试测试测试啦啦啦啦啦啦啦啊\n测试啦啦啦啦啦啦啦啦啦阿里啦\n@梦小胖 \n@萌二胖 \n$贵州茅台(SH600519)$ \n$的上次你说的承诺（12580）$ \n\nxiaoming 下划线鲜花县\n\n\n下划线下划线加粗\n"; System.out.println("The original content : " + content); content = HtmlRegexpUtil.handleImgTag(content, "{{", "}}"); System.out.println("The 1st content : " + content); content = HtmlRegexpUtil.handleExpTag(content, "", ""); System.out.println("The 2ed content : " + content); content = HtmlRegexpUtil.handleATag(content, "<", ">"); System.out.println("The 3rd content : " + content); content = HtmlRegexpUtil.removeTag(content, HtmlRegexpUtil.regSpanTag); System.out.println("The 4th content : " + content); content = HtmlRegexpUtil.removeTag(content, HtmlRegexpUtil.regStrongTag); System.out.println("The final content : " + content);
