一般的來(lái)說(shuō)，使用正則表達(dá)式可以實(shí)現(xiàn)四個(gè)功能：匹配、分割、替換、刪除。
嚴(yán)格的來(lái)說(shuō)，其實(shí)替換和刪除是一個(gè)功能，不過(guò)，從邏輯功能上來(lái)說(shuō)，是不同的。
下面，就是一個(gè)簡(jiǎn)單的demo也實(shí)現(xiàn)了上面的幾個(gè)功能，雖然比較簡(jiǎn)單，但是，對(duì)于不同的需求，都有對(duì)應(yīng)的實(shí)現(xiàn)。
希望對(duì)初學(xué)的您也能提供一點(diǎn)思路。

package org.zy.demo;

import java.io.BufferedInputStream;
import java.io.Reader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
?* a testing demo of regular express
?* @author zy
?*
?*/
public class RegularExpDemo {

?? ?public static void main(String[] args) {
?? ??? ?RegularExpDemo red = new RegularExpDemo();
?? ??? ?red.match();
?? ??? ?red.split();
?? ??? ?red.replace();
?? ??? ?red.delete();
?? ?}

?? ?/*
?? ? * just test match @param parent @param son
?? ? */
?? ?public void match() {
?? ??? ?String parent = "abcdefdssdefdsfed";
?? ??? ?String son = "d(ef)";
?? ??? ?Pattern p = Pattern.compile(son);
?? ??? ?Matcher m = p.matcher(parent);

?? ??? ?while (m.find()) {
?? ??? ??? ?System.out.println(" start? :? " + m.start());
?? ??? ??? ?System.out.println(" end : " + m.end());
?? ??? ?}

?? ?}

?? ?/*
?? ? * just test split
?? ? */
?? ?public void split() {
?? ??? ?String parent = "a/b/c/d/e/f/sd/ikshk/alke";
?? ??? ?String son = "/";
?? ??? ?Pattern p = Pattern.compile(son);

?? ??? ?String[] lstr = p.split(parent);
?? ??? ?int i = 0;
?? ??? ?while (i < lstr.length) {
?? ??? ??? ?System.out.println(lstr[i]);
?? ??? ??? ?i++;
?? ??? ?}

?? ?}

?? ?/*
?? ? * test replace
?? ? */
?? ?public void replace() {

?? ??? ?String parent = "abcdefdssdefdsfed";
?? ??? ?String son = "d[e|s].";
?? ??? ?Pattern p = Pattern.compile(son);
?? ??? ?Matcher m = p.matcher(parent);

?? ??? ?String lStr = m.replaceAll("ccgg");
?? ??? ?System.out.println(parent);
?? ??? ?System.out.println(lStr);

?? ?}

?? ?/*
?? ? * test delete
?? ? */
?? ?public void delete() {

?? ??? ?String parent = "abcdefdssdefdsfed";
?? ??? ?String son = "d[e|s].";
?? ??? ?Pattern p = Pattern.compile(son);
?? ??? ?Matcher m = p.matcher(parent);

?? ??? ?String lStr = m.replaceAll("");
?? ??? ?System.out.println(parent);
?? ??? ?System.out.println(lStr);

?? ?}
}



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