Java截取字符串保证汉字不被截取半个

Java截取字符串保证汉字不被截取半个

public class SplitString {

public static void main(String[] args) {

String str = "我ABC汉DEF";

//str = split(str, 6);

str = truncate(str,7);

System.out.println(str);

}

public static String split(String arg0, int arg1) {

char[] carr = arg0.toCharArray();

int il = carr.length;

for (int i = 0; i < arg1 && i < il; i++) {

if (carr[i] > 0xFF) {

arg1--;

}

}

int x = arg1 > 0 ? arg1 : 0;

x = arg1 < il ? arg1 : il;

return arg0.substring(0, x);

}

public static String truncate(String str, int byteLength) {

if (str == null) {

return null;

}

if (str.length() == 0) {

return str;

}

if (byteLength < 0) {

throw new IllegalArgumentException("Parameter byteLength must be great than 0");

}

char[] chs = str.toCharArray();

int i = 0;

int len = 0;

while ((len < byteLength) && (i < chs.length)) {

len = (chs[i++] > 0xff) ? (len + 2) : (len + 1);

}

if (len > byteLength) {

i--;

}

return new String(chs, 0, i);

}

}

Js截取字符串保证汉字不被截取半个：

/**

* 截取字符串：一个汉字相当于两个英文或数字字符，汉字不被截取半个

* @param str：需要截取的字符串

* @param len：截取的长度(一个汉字占两个长度)

*/

function cutstr(str,len){

var str_length = 0;

var str_len = 0;

str_cut = new String();

str_len = str.length;

for(var i = 0;i

a = str.charAt(i);

str_length++;

if(escape(a).length > 4){//中文字符的长度经编码之后大于4

str_length++;

}

str_cut = str_cut.concat(a);

if(str_length>=len){

str_cut = str_cut.concat("...");

return str_cut;

}

}

//如果给定字符串小于指定长度，则返回源字符串；

if(str_length

return  str;

}

}

转自: http://www.blackswansoft.com/songhaikang/article/20110517220909230.html