java截取某个字符之前的字符串

//java截取某个字符之前的字符串 public static void substringTest01(){ String str = "1627579713907351556-202302200018"; //截取-之前字符串 String str1 = str.substring(0, str.indexOf("-")); System.out.println("截取-之前字符串:"+str1); }