java怎样截取字符串

String s = "name=Marydon&sex=男&age=18&"; System.out.println("String去除最后一个字符：" + s.substring(0,s.length() - 1));

StringBuilder sb = new StringBuilder("name=Marydon&sex=男&age=18&"); System.out.println("StringBuilder去除最后一个字符》方式一：" + sb.substring(0,sb.length() - 1));

System.out.println("StringBuilder去除最后一个字符》方式二："+sb.replace(sb.length() - 1,sb.length(),""));

System.out.println("StringBuilder去除最后一个字符》方式三：" + sb.deleteCharAt(sb.length() - 1));