java中分割字符串的split
1、字符串在split时,需要转义的几个字符是:或|,点.,加+,乘*,,需要在前面加两个反斜杠。
eg:
String str = "abc|ABC"; for(String ss : str.split("\\|")){ System.out.print(ss);
}
//结果:abcABC
2、String的split方法用到的参数是一个正则式,请详细解读下面的api
eg:
String taskData = "123_lucy__A_CD_d_,"; String[] taskDataArr = taskData.split("_",3);//3为长度 System.out.println("length:"+taskDataArr.length); for(String ss : taskDataArr){ System.out.println(ss); } //结果: length:3 123 lucy _A_CD_d_,
String taskData = "123_lucy__A_CD_d_,"; String[] taskDataArr = taskData.split("_",-1); System.out.println("length:"+taskDataArr.length); for(String ss : taskDataArr){ System.out.println(ss); } //结果: length:7 123 lucy A CD d ,3、String的split 有时候容易出错,所以一定要注意,其中org.apache.commons.lang.StringUtils提供的split,有一点问题,所以大家使用时请谨慎
//使用org.apache.commons.lang.StringUtils.split String taskData2 = "123_lucy__A_CD_d_,"; char ch = "_".charAt(0); String[] taskDataArr2 = StringUtils.split(taskData2, ch); System.out.println("length:"+taskDataArr2.length); for(String ss : taskDataArr2){ System.out.println(ss); } //结果: length:6 123 lucy A CD d ,