Here you can find the source of cutString(String str, int length)
public static String cutString(String str, int length)
//package com.java2s; public class Main { public static String cutString(String str, int length) { return cutString(str, length, ""); }/* w ww. java2s.c o m*/ public static String cutString(String str, int length, String dot) { int strBLen = strlen(str, "GBK"); if (strBLen <= length) { return str; } int temp = 0; StringBuffer sb = new StringBuffer(length); char[] ch = str.toCharArray(); for (char c : ch) { sb.append(c); if (c > 256) { temp += 2; } else { temp += 1; } if (temp >= length) { if (dot != null) { sb.append(dot); } break; } } return sb.toString(); } public static int strlen(String str, String charset) { if (str == null || str.length() == 0) { return 0; } int length = 0; try { length = str.getBytes(charset).length; } catch (Exception e) { e.printStackTrace(); } return length; } }