##JAVA截取中英文混合字符串
import java.io.*;
class test
{
public static void main (String[] args) throws java.lang.Exception
{
StringBuffer sb = new StringBuffer();
String str = "m我abc你好";
int index=3; //定义截取的长度
int charLength = 0;
int strLength = str.length(); //获取字符的长度
for (int i = 0;i<strLength ;i++ ){
int asciiCode = str.codePointAt(i);
//将每个字符装换为ASCII编码
if (asciiCode >=0 && asciiCode<=255){
//判断ASCII编码的范围,就是判断是否为汉字
charLength+=1; //非汉字字符长度加1
} else{
charLength+=2;//汉字字符长度加2
}
if (charLength<=index) {
sb.append(str.charAt(i));//截取字符
}else{
break;
}
}
System.out.println(sb.toString());
}
}