java笔记之split

Java split()用法

特殊情况有 * ^ : | .

一、单个符号作为分隔符 

• String address="上海上海市|闵行区吴中路"; 

String[] splitAddress=address.split("\"); 
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

• String address="上海|上海市|闵行区|吴中路"; 

String[] splitAddress=address.split("\|"); //如果以竖线为分隔符，则split的时候需要加上两个斜杠【\】进行转义
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

• String address="上海*上海市*闵行区*吴中路";

 String[] splitAddress=address.split("\*");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

•  String address="上海:上海市:闵行区:吴中路";

String[] splitAddress=address.split("\:");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

•  String address="上海.上海市.闵行区.吴中路";

 String[] splitAddress=address.split("\.");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

•  String address="上海^上海市^闵行区^吴中路";

String[] splitAddress=address.split("\^");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

•   String address="上海@上海市@闵行区@吴中路";

String[] splitAddress=address.split("@");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

•  String address="上海,上海市,闵行区,吴中路";

String[] splitAddress=address.split(",");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);

 二、多个符号作为分隔符

 String address="上海^上海市@闵行区#吴中路";

String[] splitAddress=address.split("\^|@|#");
System.out.println(splitAddress[0]+splitAddress[1]+splitAddress[2]+splitAddress[3]);    

 例：

 String address = new String("192.168.13.240");
        String[] str = address.split("\.");
        for(String s : str){
            System.out.println(s);
        }

输出格式：

192

168

13

240

 

总结：（1）split表达式，其实就是一个正则表达式。*  ^ | 等符号在正则表达式中属于一种有特殊含义的字符，如果使用此种字符作为分隔符，必须使用转义符即\加以转义。

          （2）如果使用多个分隔符则需要借助 | 符号，如二所示，但需要转义符的仍然要加上分隔符进行处理