Java split()用法小结

在java.lang包中有String.split()方法，返回是一个数组。我们在应用中用到一些，给大家总结一下，仅供大家参考。

1、如果用“.”作为分隔的话,必须是如下写法,String.split("\\."),这样才能正确的分隔开,不能用String.split(".");

2、如果用“|”作为分隔的话,必须是如下写法,String.split("\\|"),这样才能正确的分隔开,不能用String.split("|");

“.”和“|”都是转义字符,必须得加"\\";

3、如果在一个字符串中有多个分隔符,可以用“|”作为连字符,比如,“acount=? and uu =? or n=?”,把三个都分隔出来,可以用String.split("and|or");

使用String.split方法分隔字符串时,分隔符如果用到一些特殊字符,可能会得不到我们预期的结果。

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]);

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