Http 415不支持的媒体类型错误与JSON

Question

我正在使用JSON请求调用REST服务,它给出了Http 415"不支持的媒体类型"错误.

请求内容类型设置为("Content-Type","application/json; charset = utf8").

如果我在请求中不包含Json对象,它可以正常工作.我正在为json使用google-gson-2.2.4库.

我尝试使用几个不同的库,但它没有任何区别.

有人可以帮我解决这个问题吗？

这是我的代码:

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

    JsonObject requestJson = new JsonObject();
    String url = "xxx";

    //method call for generating json

    requestJson = generateJSON();
    URL myurl = new URL(url);
    HttpURLConnection con = (HttpURLConnection)myurl.openConnection();
    con.setDoOutput(true);
    con.setDoInput(true);

    con.setRequestProperty("Content-Type", "application/json; charset=utf8");
    con.setRequestProperty("Accept", "application/json");
    con.setRequestProperty("Method", "POST");
    OutputStream os = con.getOutputStream();
    os.write(requestJson.toString().getBytes("UTF-8"));
    os.close();


    StringBuilder sb = new StringBuilder();  
    int HttpResult =con.getResponseCode();
    if(HttpResult ==HttpURLConnection.HTTP_OK){
    BufferedReader br = new BufferedReader(new   InputStreamReader(con.getInputStream(),"utf-8"));  

        String line = null;
        while ((line = br.readLine()) != null) {  
        sb.append(line + "\n");  
        }
         br.close(); 
         System.out.println(""+sb.toString());  

    }else{
        System.out.println(con.getResponseCode());
        System.out.println(con.getResponseMessage());  
    }  

}
public static JsonObject generateJSON () throws MalformedURLException

{
   String s = "http://www.abc.com";
        s.replaceAll("/", "\\/");
    JsonObject reqparam=new JsonObject();
    reqparam.addProperty("type", "arl");
    reqparam.addProperty("action", "remove");
    reqparam.addProperty("domain", "staging");
    reqparam.addProperty("objects", s);
    return reqparam;

}
}

requestJson.toString的值是:

{"type":"arl","action":"remove","domain":"staging","objects":" http://www.abc.com "}

Answer 1

不知道的原因,但删除线charset=utf8,从 con.setRequestProperty("Content-Type", "application/json; charset=utf8")解决问题.

Answer 2

添加内容类型:application/json并接受:application/json

Answer 3

HttpVerb 需要其标头作为键值对的字典

headers = {'Content-Type': 'application/json', 'charset': 'utf-8'}

Answer 4

这是因为之后charset=utf8应该没有空格application/json.那会很好.像它一样使用它application/json;charset=utf-8

Answer 5

如果您要通过发布请求，Postman请确保您选择了这两个选项

1. 应选择 JSON(application/json)

2.内容类型-application/json

Answer 6

如果你正在制作jquery ajax请求,别忘了添加

contentType:'application/json'

Answer 7

如果您正在使用AJAX jQuery请求，这是必须申请的。如果不是，它会抛出你的415错误。

dataType: "json",
contentType:'application/json'

Answer 8

如果您在 React RSAA 中间件或类似软件中获得此信息，请添加标头：

  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify(model),