GSON不发送UTF-8

Question

以下方法发送JSON回复.但是在接收端我不断收到无效字符,而UTF-8没有解码数据.我究竟做错了什么？

响应客户端=数据输出流

//Get the client request
            clientRequest = new BufferedReader(new InputStreamReader(connectedClient.getInputStream())); //connectedclient = socket

            //Start response object
            responseToClient = new DataOutputStream(connectedClient.getOutputStream());


/**
     * Sends a JSON response for an object
     * @param objectToEncode
     * @throws Exception
     */
    private void sendJSONResponse(Object objectToEncode) throws Exception{

        //Encode object into JSON
        String jsonString = new Gson().toJson(objectToEncode);

        // HTTP Header... Status code, last modified
        responseToClient.writeBytes(HTTP_OK_STATUS_CODE);
        responseToClient.writeBytes(CONTENT_TYPE_JSON);
        responseToClient.writeBytes("Last-modified: "+ HelperMethods.now() +" \r\n");
        responseToClient.writeBytes("\r\n"); 

        // The HTTP content starts here
        responseToClient.writeBytes(jsonString);

    }

Answer 1

我不知道你为什么要编写自己的HTTP协议代码.这就像编写自己的XML解析器一样:无论你是多么优秀的程序员,你一定会弄错它.

无论如何,正如DataOutputStream文档所述,writeBytes对String执行操作只会丢弃其高8位.所以你得到的是......某些东西,但不是UTF8.你应该做的是:

String jsonString = new Gson().toJson(objectToEncode);
byte[] utf8JsonString = jsonString.getBytes("UTF8");
responseToClient.write(utf8JsonString, 0, utf8JsonString.Length);

Answer 2

第一个解决方案对我不起作用，我这样做了：

Gson gson = new GsonBuilder().disableHtmlEscaping().create();
String json = gson.toJson(objectToEncode);