服务器A 向 服务器B 传输数据，

服务器B接到数据：

两端都在方法里设置了：

request.setCharacterEncoding("UTF-8");

response.setContentType("text/plain; charset=UTF-8");

//开始获取：

String data = request.getParameter("json");

Log.info("发来数据："+data);

String coding = getEncoding(data);

public static String getEncoding(String str) {

Log.info("--GB2312 ：" + new String(str.getBytes(), "GB2312"));

Log.info("--ISO-8859-1 ：" + new String(str.getBytes(), "ISO-8859-1"));

Log.info("--UTF-8 ：" + new String(str.getBytes(), "UTF-8"));

Log.info("--GBK ：" + new String(str.getBytes(), "GBK"));

Log.info("--GB2312 ---2：" + new String(str.getBytes("GB2312")));

Log.info("--ISO-8859-1 ---2：" + new String(str.getBytes("ISO-8859-1")));

Log.info("--UTF-8--2：" + new String(str.getBytes("UTF-8")));

Log.info("--GBK--2 ：" + new String(str.getBytes("GBK")));

Log.info("UTF-8--GB2312 ：" + new String(str.getBytes("UTF-8"), "GB2312"));

Log.info("UTF-8--ISO-8859-1 ：" + new String(str.getBytes("UTF-8"), "ISO-8859-1"));

Log.info("UTF-8--UTF-8 ：" + new String(str.getBytes("UTF-8"), "UTF-8"));

Log.info("UTF-8--GBK ：" + new String(str.getBytes("UTF-8"), "GBK"));

Log.info("GB2312--UTF-8 ：" + new String(str.getBytes("GB2312"), "UTF-8"));

Log.info("GB2312--ISO-8859-1 ：" + new String(str.getBytes("GB2312"), "ISO-8859-1"));

Log.info("GB2312--GBK ：" + new String(str.getBytes("GB2312"), "GBK"));

Log.info("GB2312--GB2312 ：" + new String(str.getBytes("GB2312"), "GB2312"));

Log.info("ISO-8859-1--GBK ：" + new String(str.getBytes("ISO-8859-1"), "GBK"));

Log.info("ISO-8859-1--UTF-8 ：" + new String(str.getBytes("ISO-8859-1"), "UTF-8"));

Log.info("ISO-8859-1--GB2312 ：" + new String(str.getBytes("ISO-8859-1"), "GB2312"));

Log.info("ISO-8859-1--ISO-8859-1 ：" + new String(str.getBytes("ISO-8859-1"), "ISO-8859-1"));

Log.info("GBK--GB2312：" + new String(str.getBytes("GBK"), "GB2312"));

Log.info("GBK--ISO-8859-1：" + new String(str.getBytes("GBK"), "ISO-8859-1"));

Log.info("GBK--UTF-8：" + new String(str.getBytes("GBK"), "UTF-8"));

Log.info("GBK--GBK：" + new String(str.getBytes("GBK"), "GBK"));

}

日志截图里 xm：“???” 是中文名字，

无论怎么转换字符集，都是 ？？？ 格式乱码！

求大神帮忙看看！！！！