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:
- 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}";
- String input = "QQ120282458,QQ120282458 QQ125826";
- 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:
去除重复值前
- 120282458
- 120282458
- 125826
去除重复值后
125826
120282458
改进版: 弄成一个 bean:
- 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
来源: http://www.phperz.com/article/18/0228/358872.html