笔记_正则表达式替换字符串中特定范围内的字符。

 

功能：从字符串中找到所有<>之间的单引号，转换成双引号。

如：

<p><style height='222' index="index" id="css_index">那里最便宜asdfasdfa'as''asdfasdf'asdf'<a class='asdfa' href='ssss'></a></p>
转换成：

<p><style height="222" index="index" id="css_index">那里最便宜asdfasdfa'as''asdfasdf'asdf'<a class="asdfa" href="ssss"></a></p>

 

代码：

package test_java;

import java.util.regex.Matcher; import java.util.regex.Pattern;

public class test004 {

 public static void main(String[] args) {   

String str = "<p><style height='222' index=\"index\" id=\"css_index\">那里最便宜asdfasdfa'as''asdfasdf'asdf'<a class='asdfa' href='ssss'></a></p>";   

System.out.println(str);   

String result = changeStr(str);   

System.out.println(result);  }    

private static String changeStr(String str){   

Pattern p2 = Pattern.compile("\\<(.*?)\\>");     

Matcher m2 = p2.matcher(str);     

String temp = null;   

StringBuffer sb = new StringBuffer();     

while (m2.find()) {        

temp = "<" + m2.group(1) + ">";   

temp = temp.replace("'", "\"");    

m2.appendReplacement(sb, temp);   }    

 m2.appendTail(sb);   

return sb.toString();    }

}