Is usually used in place we need to show the first name of Chinese characters, the interception of amplification, an effect similar to that Taobao recipient.
As shown below
usage:
// Chinese character length determining taken
String name = "pleases";
// String calculating the byte length of the string, a character is two bytes
int = nameLenght TextCut.TextLength (name);
// here taken four byte, which is the first two characters,
String result = TextCut.getSubString (name,. 4);
of System.out.print (result); // print result is: is the
utility class below, copy and paste can be used directly .
public class TextCut {
public static int TextLength(String value) {
int valueLength = 0;
String chinese = "[\u0391-\uFFE5]";
/* 获取字段值的长度，如果含中文字符，则每个中文字符长度为2，否则为1 */
for (int i = 0; i < value.length(); i++) {
/* 获取一个字符 */
String temp = value.substring(i, i + 1);
/* 判断是否为中文字符 */
if (temp.matches(chinese)) {
/* 中文字符长度为2 */
valueLength += 2;
} else {
/* 其他字符长度为1 */
valueLength += 1;
}
}
return valueLength;
}
public static String getSubString(String str, int length) {
int count = 0;
int offset = 0;
char[] c = str.toCharArray();
int size = c.length;
if(size >= length){
for (int i = 0; i < c.length; i++) {
if (c[i] > 256) {
offset = 2;
count += 2;
} else {
offset = 1;
count++;
}
if (count == length) {
return str.substring(0, i + 1);
}
if ((count == length + 1 && offset == 2)) {
return str.substring(0, i);
}
}
}else{
return str;
}
return "";
}
}
