java中文乱码的处理类

public class EncodingChange {

    public static String toString(String str) {
    try {
    if (str == null || str.trim().equals("")) {
    return "";
    } else {
    return new String(str.getBytes("ISO-8859-1"), "UTF-8");
    }
    } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
    return str;
   }
 }
}