本文實例講述了java正則表達式實現提取需要的字符并放入數組。分享給大家供大家參考,具體如下:
這里演示Java正則表達式提取需要的字符并放入數組,即ArrayList數組去重復功能。
具體代碼如下:
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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}" ; 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( "去除重復值前" ); for ( int i= 0 ;i<al.size();i++) { System.out.println(al.get(i).toString()); } //去除重復值 HashSet hs= new HashSet(al); al.clear(); al.addAll(hs); System.out.println( "去除重復值后" ); for ( int i= 0 ;i<al.size();i++) { System.out.println(al.get(i).toString()); } } } |
輸出結果為:
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去除重復值前 120282458 120282458 125826 去除重復值后 125826 120282458 |
改進版:弄成一個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()); } } } |
希望本文所述對大家java程序設計有所幫助。