java正则表达式过滤html标签

1、importjava.util.regex.Matcher;importjava.util.regex.Pattern;/*Title:HTML相关的正则表达式工具类*Description:包括过滤HTML标记，转换HTML标记，替换特定HTML标记*Copyright:Copyright(c)2006*authorhejian*version1.0*createtime2006-10-16*/publicclassHtmlRegexpUtilprivatefinalstaticStringregxpForHtml=*);/过滤所有以开头以结尾的标签privatefinalstaticStr

2、ingregxpForlmgTag=*)s*;/找出IMG标签privatefinalstaticStringregxpForlmaTagSrcAttrib=src=(A+);/找出IMG标签的SRC属性/*/publicHtmlRegexpUtil()/TODOAuto-generatedconstructorstub/*基本功能：替换标记以正常显示*paraminputreturnString*/publicStringreplaceTag(Stringinput)if(!hasSpecialChars(input)returninput;StringBufferfiltered=newS

3、tringBuffer(input.length();charc;for(inti=0;i=input.length()-1;i+)c=input.charAt(i);switch(c)case:filtered.append(:filtered.append();break;f,aMil.case:filtered.append();break;case&:filtered.append(&);break;default:filtered.append(c);return(filtered.toString();/*基本功能：判断标记是否存在*paraminput*returnboolean

4、*/publicbooleanhasSpecialChars(Stringinput)booleanflag=false;if(input!=null)&(input.length()0)charc;for(inti=0;i:flag=true;break;case:flag=true;break;亠faIIIIcase:flag=true;break;case&:flag=true;break;returnflag;/*基本功能：过滤所有以结尾的标签*paramstr*returnString*/publicstaticStringfilterHtml(Stringstr)Patternpa

5、ttern=Ppile(regxpForHtml);Matchermatcher=pattern.matcher(str);StringBuffersb=newStringBuffer();booleanresult1=matcher.find();while(result1)matcher.appendReplacement(sb,);result1=matcher.find();matcher.appendTail(sb);returnsb.toString();/*基本功能：过滤指定标签*paramstr*paramtag指定标签*returnString*/publicstaticSt

6、ringfiterHtmlTag(Stringstr,Stringtag)Stringregxp=*)s*;Patternpattern=Ppile(regxp);Matchermatcher=pattern.matcher(str);StringBuffersb=newStringBuffer();booleanresult1=matcher.find();while(result1)matcher.appendReplacement(sb,);result1=matcher.find();matcher.appendTail(sb);returnsb.toString();/*基本功能：替

7、换指定的标签*paramstrparambeforeTag要替换的标签*paramtagAttrib要替换的标签属性值*paramstartTag新标签开始标记*paramendTag新标签结束标记returnString如：替换img标签的src属性值为img属性值/img*/publicstaticStringreplaceHtmlTag(Stringstr,StringbeforeTag,StringtagAttrib,StringstartTag,StringendTag)StringregxpForTag=*)s*;StringregxpForTagAttrib=tagAttrib+

8、=(a+);PatternpatternForTag=Ppile(regxpForTag);PatternpatternForAttrib=Ppile(regxpForTagAttrib);MatchermatcherForTag=patternForTag.matcher(str);StringBuffersb=newStringBuffer();booleanresult=matcherForTag.find();while(result)只压缩代码对不影响StringBuffersbreplace=newStringBuffer();MatchermatcherForAttrib=patternForAttrib.matcher(matcherForTag.group(1);if(matcherForAttrib.find()matcherForAttrib.appendReplacement(sbreplace,startTag+matcherForAttrib.group(1)+endTag);ma