java使用正则的例子

package com.accord.util;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

/**

 * 正则表达式匹配两个字符串之间的内容

 * @author Administrator

 *

 */

public class RegexUtil {

    public static void main(String[] args) {

        String str = "<?xml version='1.0' encoding='UTF-8'?><ufinterface billtype='gl' filename='e:\1.xml' isexchange='Y' proc='add' receiver='1060337@1060337-003' replace='Y' roottag='sendresult' sender='01' successful='Y'><sendresult><billpk></billpk><bdocid>w764</bdocid><filename>e:\1.xml</filename><resultcode>1</resultcode><resultdescription>单据w764开始处理...单据w764处理完毕!</resultdescription><content>2017.09-记账凭证-1</content></sendresult><sendresult><billpk></billpk><bdocid>w1007</bdocid><filename>e:\1.xml</filename><resultcode>1</resultcode><resultdescription>单据w1007开始处理...单据w1007处理完毕!</resultdescription><content>2017.10-记账凭证-1</content></sendresult><sendresult><billpk></billpk><bdocid>w516</bdocid><filename>e:\1.xml</filename><resultcode>1</resultcode><resultdescription>单据w516开始处理...单据w516处理完毕!</resultdescription><content>2017.07-记账凭证-50</content></sendresult></ufinterface>";

        //String str = "abc3443abcfgjhgabcgfjabc";  

        String rgex = "<bdocid>(.*?)</bdocid>";

        System.out.println((new RegexUtil()).getSubUtil(str,rgex)); 

        List<String> lists = (new RegexUtil()).getSubUtil(str,rgex);

        for (String string : lists) {

            System.out.println(string);

        }

        System.out.println((new RegexUtil()).getSubUtilSimple(str, rgex));  

    }

    /** 

     * 正则表达式匹配两个指定字符串中间的内容 

     * @param soap 

     * @return 

     */  

    public List<String> getSubUtil(String soap,String rgex){  

        List<String> list = new ArrayList<String>();  

        Pattern pattern = Pattern.compile(rgex);// 匹配的模式  

        Matcher m = pattern.matcher(soap);  

        while (m.find()) {  

            int i = 1;  

            list.add(m.group(i));  

            i++;  

        }  

        return list;  

    }  

    /** 

     * 返回单个字符串，若匹配到多个的话就返回第一个，方法与getSubUtil一样 

     * @param soap 

     * @param rgex 

     * @return 

     */  

    public String getSubUtilSimple(String soap,String rgex){  

        Pattern pattern = Pattern.compile(rgex);// 匹配的模式  

        Matcher m = pattern.matcher(soap);  

        while(m.find()){  

            return m.group(1);