当内容类型为 application/x-www-form-urlencoded 时，Java 读取 POST 数据

Question

我有一个正在测试的 API。API 接收 POST 请求并像这样读取它

      StringBuffer jb = new StringBuffer();
      String line = null;
      try {
        BufferedReader reader = request.getReader();
        while ((line = reader.readLine()) != null)
            jb.append(line);

        System.out.println("jb: "+jb);
        System.out.println("request.getHeader('content-type'): "+request.getHeader("content-type"));

      } catch (Exception e) { /*report an error*/ }

当我在“application/json;charset=utf-8”中发送 POST 请求时，一切正常

httpPost.setHeader("content-type", "application/json;charset=utf-8");

它打印这个：

jb: {"client_domain":"=....); //proper Json data
request.getHeader('content-type'): application/json;charset=utf-8

我可以正确读取数据。

但是我的问题是当我以相同的方式发送数据但我设置了内容类型“application/x-www-form-urlencoded;charset=utf-8”

httpPost.setHeader("content-type", "application/x-www-form-urlencoded;charset=utf-8");

测试相同，只是内容类型不同，但似乎我不再收到任何数据：

jb: 
request.getHeader('content-type'): application/x-www-form-urlencoded;charset=utf-8

任何的想法？

/// 更新

这是弹簧控制器

@RequestMapping(value = {"user/add"}, method = RequestMethod.POST, produces="application/json; charset=utf-8")
@ResponseBody
public ResponseEntity<String> getNewUserApi(HttpServletRequest request,
        HttpServletResponse response) throws Exception {

    Map<String, Object> jsonObj = new HashMap<String, Object>();

    StringBuffer jb = new StringBuffer();
      String line = null;
      try {
        BufferedReader reader = request.getReader();
        while ((line = reader.readLine()) != null)
            jb.append(line);

        System.out.println("jb: "+jb);
        System.out.println("request.getHeader('content-type'): "+request.getHeader("content-type"));

      } catch (Exception e) { /*report an error*/ }
    ///I create my JSon that will be sent back
    return JsonUtils.createJson(jsonObj);

//更新2这是我发送数据的方式

public static void main(String[] args) throws Exception {

    String url = "http://localhost:8080/child/apiv1/user/add";
    CloseableHttpClient client = HttpClientBuilder.create().build();

    HttpPost httpPost = new HttpPost(url);
    httpPost.setHeader("content-type", "application/x-www-form-urlencoded;charset=utf-8");

    try {
        //we had to the parameters to the post request
        JSONObject json = new JSONObject();

        json.put("client_id", "fashfksajfhjsakfaskljhflakj");
        json.put("client_secret", "9435798243750923470925709348509275092");
        json.put("client_domain", "dummy.localhost.com");

        //create the user json object
        JSONObject userObj = new JSONObject();
        userObj.put("email", "johnsmith42@yopmail.com");
        userObj.put("name", "Anna Sax");

        JSONArray childrenArray = new JSONArray();

        JSONObject child1 = new JSONObject();
        child1.put("name", "Iphone 6");
        child1.put("age", "2");
        childrenArray.put(child1);
        userObj.put("children", childrenArray);
        json.put("user", childObj);

        StringEntity params = new StringEntity(json.toString());
        httpPost.setEntity(params);

        System.out.println("executing request: " + httpPost.getRequestLine());
        HttpResponse response;
        response = client.execute(httpPost);

   //[...]       

} //End main

我知道创建 Json 并在“application/x-www-form-urlencoded”中发送它真的没有意义，但只是我们的一个用户无法解决他的问题，它只会发送“application/x -www-form-urlencoded”。

Answer 1

@RequestMapping 的 'products' 属性表明客户端只能接受 application/json 数据，因此您可以将其删除或将其更改为 'application/x-www-form-urlencoded'。