本文实例讲述了java正则表达式实现提取需要的字符并放入数组。分享给大家供大家参考，具体如下：
这里演示Java正则表达式提取需要的字符并放入数组，即ArrayList数组去重复功能。
具体代码如下：
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package com.test.tool;import java.util.ArrayList;import java.util.HashSet;import java.util.regex.*;public class MatchTest { public static void main(String[] args) { String regex = "[0-9]{5,12}"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); ArrayList al=new ArrayList(); while (m.find()) { al.add(m.group(0)); } System.out.println("去除重复值前"); for (int i=0;i<al.size();i++) { System.out.println(al.get(i).toString()); } //去除重复值 HashSet hs=new HashSet(al); al.clear(); al.addAll(hs); System.out.println("去除重复值后"); for (int i=0;i<al.size();i++) { System.out.println(al.get(i).toString()); } }} |
输出结果为：
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去除重复值前120282458120282458125826去除重复值后125826120282458 |
改进版：弄成一个bean:
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package com.test.tool;import java.util.ArrayList;import java.util.HashSet;import java.util.regex.*;public class MatchTest { private String regex; private String input; private ArrayList al; public String getRegex() { return regex; } public void setRegex(String regex) { this.regex = regex; } public String getInput() { return input; } public void setInput(String input) { this.input = input; } public ArrayList getAl() { return al; } public void setAl(ArrayList al) { this.al = al; } public MatchTest(String regex,String input) { Pattern p=Pattern.compile(regex); Matcher m=p.matcher(input); ArrayList myal=new ArrayList(); while (m.find()) { myal.add(m.group()); } HashSet hs=new HashSet(myal); myal.clear(); myal.add(hs); this.setRegex(regex); this.setInput(input); this.setAl(myal); } public MatchTest(){} public static void main(String[] args){ String regex1 = "[0-9]{5,12}"; String input1="QQ120282458，QQ120282458 QQ125826"; //String input1="QQ"; MatchTest mt=new MatchTest(regex1,input1); for (int i=0;i<mt.getAl().size();i++) { System.out.println(mt.getAl().get(i).toString()); } }} |
希望本文所述对大家java程序设计有所帮助。
