想要截取字符串前几位与后几位,主要代码如下 截取字符串前几位 var disName ='开心一族漂亮家园'; var shortName = disName.substring(0,5); console.log(shortName);//打印结果:开心一族漂 截取字符串后几位 var disName ='开心一族漂亮家园'; var disLength = disName.length; var shortName = disName.substring(disLength-2,disLen
例子1: var num = "112233.99887766";console.log(num.substring(0,(num.indexOf(".")+5)));返回:112233.9988 例子2: var item = "https://www.oss-cn-hangzhou.aliyuncs.com/www20190107/e220d0f66c8a643c8e16dc9aa01f51b3194/箱数.png";console.log(
public class F { public static void main(String[] args) { /**截取字符串,第4位以后的字符串用*代替*/ String s = "Hello Java World"; System.out.println("直接输出:" + s); String a = s.substring(4,s.length()); for (int i = 0;i < a.length() ; i++){ a = a.rep