httpclient4 post 請求亂碼

HttpPost post=new HttpPost(url);
StringEntity content=new StringEntity(data, Charset.forName("utf-8"));// 第二個參數，設置後纔會對，內容進行編碼

content.setContentType("application/json; charset=UTF-8");
content.setContentEncoding("utf-8");
post.setEntity(content);