REST，HTTP POST demo

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客户端程序（其中，content为要传输的json数据）：

                HttpPost httppost = new HttpPost("http://xxxhost/api/my_path?mc=1");HttpClient httpclient = HttpClientBuilder.create().build();try {StringEntity reqEntity = new StringEntity(<strong><span style="color:#ff0000;">content</span></strong>);reqEntity.setContentType("application/json");httppost.setEntity(reqEntity);HttpResponse httpresponse = httpclient.execute(httppost);HttpEntity entity = httpresponse.getEntity();String body = EntityUtils.toString(entity);System.out.println(body);

服务器端程序：

@Path("/<span style="font-family: Arial, Helvetica, sans-serif;">my_path</span>")public class Events {@POST@Consumes(MediaType.APPLICATION_JSON)public Response addEvent(<strong><span style="color:#ff0000;">@QueryParam</span></strong>(ConfigItemConstants.CONFIG_ITEM_MC) String mc, Object eventStr){if(!GenericValidator.isNullOrBlank(mc) && !ConfigItemUtil.verifyMC(mc)){//在这里，验证你传过来的mc参数，通过则继续return ResponseUtil.setErrorResponse(403, "Forbidden", "User does not have access to this service!");}EventService eventService = new EventService();int code = 200;String resBody = "";int rtn = 0;try {Long id = eventService.createEvent(eventStr);//传过来的json数据都在eventStr中，你可以根据需求自己处理，比如存储到NoSQL中。rtn = 1;} catch (Exception e) {rtn = -1;e.printStackTrace();} if(rtn == 1){code = 201;resBody = "The event created successfully";}else if(rtn == -1){code = 400;resBody = "Format of request is not correct";}//logger.exit();if(rtn == 1){return ResponseUtil.setResponse(code, resBody);} else {return ResponseUtil.setErrorResponse(code, "Bad Request", resBody);}}@Path("{delete}")@DELETE@Consumes(MediaType.APPLICATION_JSON)public Response deleteEvent(@QueryParam(ConfigItemConstants.CONFIG_ITEM_MC) String mc, String vehicleId){if(!GenericValidator.isNullOrBlank(mc) && !ConfigItemUtil.verifyMC(mc)){return ResponseUtil.setErrorResponse(403, "Forbidden", "User does not have access to this service!");}EventService eventService = new EventService();int code = 200;String resBody = "";int rtn = 0;try{Long id = eventService.deleteEvent(vehicleId);rtn = 1;}catch(Exception e){rtn = -1;e.printStackTrace();}if(rtn == 1){code = 201;resBody = "The event created successfully";}else if(rtn == -1){code = 400;resBody = "Format of request is not correct";}if(rtn == 1){return ResponseUtil.setResponse(code, resBody);} else {return ResponseUtil.setErrorResponse(code, "Bad Request", resBody);}}}

Note：客户端程序和服务器端程序只是相对来说的，这是受传统开发web project的思维影响！新的技术都可能颠覆这种思维！做技术，思维一定要跟上！尤其是出现了REST，DevOps，cloud service，Nodejs，distribution app。

准确来说一个是http post request端，一个是http post response端。实际上，这两个都是服务器容器App。

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