How to send Request payload to REST API in java

Question

I want to retrieve the JSON data from the following  https   git eclipse org r   c 11376   Request URL  https   git eclipse org r gerrit rpc ChangeDetailService  Request Method  POST  Request Headers   Accept application json  Content-Type application json  charset UTF-8   Request Payload     jsonrpc   2 0   method   changeDetail   params     id  11376    id  1    I already tried  this answer  but I am getting 400 BAD REQUEST   Can anyone help me sort this out   Thanks

User · Answer

I tried with a rest client   Headers     POST  r gerrit rpc ChangeDetailService HTTP 1 1 Host  git eclipse org User-Agent  Mozilla 5 0  Windows NT 5 1  rv 18 0  Gecko 20100101 Firefox 18 0 Accept  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  charset UTF-8 Content-Length  73 Connection  keep-alive   it works fine  I retrieve 200 OK with a good body   Why do you set a status code in your request  and multiple declaration  Accept  with  Accept application json application json application jsonrequest   just a statement is enough

User · Answer

The following code works for me     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     method implementation   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

[java] How to send Request payload to REST API in java?

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