HttpClient推送数据，对方接收到的中文数据乱码，显示问号

没改之前，中文乱码

httpPost.addHeader("Content-Type", "application/json;charset=utf-8");
httpPost.setEntity(new StringEntity(JSONObject.toJSONString(putData)));

其实就是需要在将数据putDate转成StringEntity时，设置一个格式再发给httpPost

修改之后

httpPost.addHeader("Content-Type", "application/json;charset=utf-8");
StringEntity stringEntity;  
stringEntity = new StringEntity((JSONObject.toJSONString(putData)),"utf-8");  
httpPost.setEntity(stringEntity);

参考了：https://blog.youkuaiyun.com/sdxushuxun/article/details/79282112 解决的问题

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