取中英文混合的字串的长度

new String(aString.getBytes("GBK"), "ISO8859_1").length()

例如：

package test;public class MyTest {public static void main(String[] args) {try {String aa = new String("a测b试c");System.out.println(aa.length());String bb = new String(aa.getBytes("GBK"), "ISO8859_1");System.out.println(bb.length());} catch (Exception e) {e.printStackTrace();}}}/*output: * 5 * 7 */