本文實例講述了java正規表示式實作提取所需的字元並放入陣列。分享給大家供大家參考,具體如下:
這裡示範Java正規表示式提取所需的字元並放入數組,即ArrayList數組去重複功能。
具體程式碼如下:
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()); } } }
輸出結果為:
去除重复值前 120282458 120282458 125826 去除重复值后 125826 120282458
改良版:弄成一個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()); } } }
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