如何在Java中向REST API发送Request有效负载?

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

请求URL: https://git.eclipse.org/r/gerrit/rpc/ChangeDetailServicehttps://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} 

我已经尝试过这个答案,但我得到400 BAD REQUEST

任何人都可以帮我解决这个问题吗?

谢谢。

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); 

方法实现:

 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(); } catch (Exception e) { throw new RuntimeException(e.getMessage()); } return jsonString.toString(); } 

我尝试了一个rest客户端。

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
  • Accept-Encoding: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:保持活力

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? 并使用Accept:application / json,application / json,application / jsonrequest进行多次声明“ Accept ”。 只是一个声明就足够了。