处理所有的中文乱码

   String str=ff.getFileName();  System.out.println(new   String(str.getBytes("GBK"),"ISO8859-1"));     System.out.println(new   String(str.getBytes("GBK"),"utf-8"));     System.out.println(new   String(str.getBytes("GBK"),"GB2312"));     System.out.println(new   String(str.getBytes("GBK"),"GBK"));     System.out.println(new   String(str.getBytes("ISO8859-1"),"GBK"));     System.out.println(new   String(str.getBytes("ISO8859-1"),"ISO8859-1"));     System.out.println(new   String(str.getBytes("ISO8859-1"),"GB2312"));     System.out.println(new   String(str.getBytes("ISO8859-1"),"utf-8"));     System.out.println(new   String(str.getBytes("utf-8"),"GBK"));     System.out.println(new   String(str.getBytes("utf-8"),"utf-8"));     System.out.println(new   String(str.getBytes("utf-8"),"GB2312"));     System.out.println(new   String(str.getBytes("utf-8"),"ISO8859-1"));     System.out.println(new   String(str.getBytes("GB2312"),"GB2312"));     System.out.println(new   String(str.getBytes("GB2312"),"ISO8859-1"));     System.out.println(new   String(str.getBytes("GB2312"),"utf-8"));     System.out.println(new   String(str.getBytes("GB2312"),"GBK"));