Java/section.java.util.regex.xml at master · freebook/Java · GitHub

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<?xml version="1.0" encoding="UTF-8"?>
<chapter id="java.util.regex">
	<title>正则表达式</title>
	<programlisting>
		<![CDATA[
package cn.netkiller;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {


    public static void main(String[] args) {

        Pattern pattern = Pattern.compile("www|netkiller");
        Matcher matcher = pattern.matcher("http://www.netkiller.cn/linux/index.html");
        if (matcher.find()) {
            System.out.println(matcher.group());
        }

    }
}
		]]>
	</programlisting>
	<section>
		<title>正则查找</title>
		<para></para>
		<programlisting>
			<![CDATA[
        Matcher matcher = Pattern.compile("播放|暂停|停止").matcher("当前暂停音乐");

        if(matcher.find()){
            System.out.println(matcher.group(0));
        }

        if(Pattern.compile("播放|暂停|停止").matcher("当前停音乐").find()){
            System.out.println("查找到");
        }
			]]>
		</programlisting>
	</section>
	<section>
		<title>正则替换</title>
		<programlisting>
			<![CDATA[
package cn.netkiller;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {

    public static void main(String[] args) {

        Pattern pattern = Pattern.compile("www|netkiller");
        Matcher matcher = pattern.matcher("https://www.netkiller.cn/linux/index.html");
        if (matcher.find()) {
            String s = matcher.replaceFirst("api"); //替换后的字符串
            System.out.println(s);
        }

    }
}
			]]>
		</programlisting>
		<programlisting>
			<![CDATA[
package cn.netkiller;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {


    public static void main(String[] args) {

        Pattern pattern = Pattern.compile("www|netkiller");
        Matcher matcher = pattern.matcher("https://www.netkiller.cn/linux/index.html");
        if (matcher.find()) {
            String s = matcher.replaceAll("test"); //替换后的字符串
            System.out.println(s);
            // 输出结果：https://test.test.cn/linux/index.html
        }

    }
}
			]]>
		</programlisting>
		<para></para>
		<programlisting>
			<![CDATA[
"aab".replaceAll("a{1}", "x"); //xxb
"aba".replaceAll("a{1}", "x"); //xbx

"abaaabaaaba".replaceAll("a{2}", "x");  //abxabxaba
"abaabaaaaba".replaceAll("a{2}", "x"); //abxbxxba
			]]>
		</programlisting>
	</section>
	<section>
		<title>字符串分割</title>
		<programlisting>
			<![CDATA[
        String input = "苹果!!香蕉!!鸭梨!!橘子";
        System.out.println(Arrays.toString(Pattern.compile("!!").split(input)));
        System.out.println(Arrays.toString(Pattern.compile("!!").split(input, 3)));
			]]>
		</programlisting>
		<screen>
			<![CDATA[
[苹果, 香蕉, 鸭梨, 橘子]
[苹果, 香蕉, 鸭梨!!橘子]
			]]>
		</screen>
	</section>

</chapter>