如何将请求有效负载发送到Java中的REST API?

时间:2013-03-22 12:45:06

标签: java rest httpurlconnection http-status-code-400

我想从以下内容中检索JSON数据: https://git.eclipse.org/r/#/c/11376/

请求网址:https://git.eclipse.org/r/gerrit/rpc/ChangeDetailService

请求方法:POST

请求标题:

Accept:application/json

Content-Type:application/json; charset=UTF-8

请求有效负载:

{"jsonrpc":"2.0","method":"changeDetail","params":[{"id":11376}],"id":1}

我已经尝试了 this answer ,但我得到了400 BAD REQUEST

任何人都可以帮我解决这个问题吗?

感谢。

2 个答案:

答案 0 :(得分:39)

以下代码适用于我。

//escape the double quotes in json string
String payload="{\"jsonrpc\":\"2.0\",\"method\":\"changeDetail\",\"params\":[{\"id\":11376}],\"id\":2}";
String requestUrl="https://git.eclipse.org/r/gerrit/rpc/ChangeDetailService";
sendPostRequest(requestUrl, payload);

方法实施:

public static String sendPostRequest(String requestUrl, String payload) {
    try {
        URL url = new URL(requestUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
        writer.write(payload);
        writer.close();
        BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringBuffer jsonString = new StringBuffer();
        String line;
        while ((line = br.readLine()) != null) {
                jsonString.append(line);
        }
        br.close();
        connection.disconnect();
        return jsonString.toString();
    } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
    }

}

答案 1 :(得分:0)

我尝试了一个休息客户。

标题:

  • POST / r / gerrit / rpc / ChangeDetailService HTTP / 1.1
  • 主持人:git.eclipse.org
  • User-Agent:Mozilla / 5.0(Windows NT 5.1; rv:18.0)Gecko / 20100101 Firefox / 18.0
  • 接受:application / json
  • Accept-Language:null
  • 接受编码:gzip,deflate,sdch
  • accept-charset:ISO-8859-1,utf-8; q = 0.7,*; q = 0.3
  • Content-Type:application / json;字符集= UTF-8
  • 内容长度:73
  • 连接:keep-alive

它工作正常。我用一个好身体检索200 OK。

为什么在请求中设置状态代码? 使用Accept:application / json,application / json,application / jsonrequest进行多次声明“接受”。只是声明就足够了。