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:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
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:
1
2
3
4
5
6
7
|
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:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
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。