java一个接口调取另一个接口
工具类
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package com.utils; import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL; import org.apache.log4j.Logger; import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import com.userbackend.controller.UserInfoController;import com.userbackend.model.User; //调取接口方法public class ToInterface {/*** 调测日志记录器。*/private static final Logger DEBUGGER = Logger.getLogger(UserInfoController.class); /*** 调用对方接口方法* * @param path* 对方或第三方提供的路径* @param data* 向对方或第三方发送的数据，大多数情况下给对方发送JSON数据让对方解析* @param requestMethod* 请求方式* */public static StringBuffer interfaceUtil(String path, Object data, String requestMethod) {StringBuffer sb = new StringBuffer();DEBUGGER.info("请求数据：" + data);try {URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 打开和url之间的连接PrintWriter out = null;conn.setRequestMethod(requestMethod); // 请求方式// 设置通用的请求属性conn.setRequestProperty("accept", "*/*");conn.setRequestProperty("connection", "Keep-Alive");//设置传到另一个接口的格式为jsonconn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");// 设置是否向httpUrlConnection输出，设置是否从httpUrlConnection读入，此外发送post请求必须设置这两个// 最常用的Http请求无非是get和post，get请求可以获取静态页面，也可以把参数放在URL字串后面，传递给servlet，// post与get的 不同之处在于post的参数不是放在URL字串里面，而是放在http请求的正文内。conn.setDoOutput(true);conn.setDoInput(true);// allowUserInteraction 如果为 true，则在允许用户交互（例如弹出一个验证对话框）的上下文中对此 URL 进行检查。conn.setAllowUserInteraction(false);// 获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());// 发送请求参数即数据out.print(data);// 缓冲数据out.flush();out.close();// 获取URLConnection对象对应的输入流InputStream is = conn.getInputStream();// 构造一个字符流缓存BufferedReader br = new BufferedReader(new InputStreamReader(is));String str = "";while ((str = br.readLine()) != null) {sb.append(str);}// 关闭流is.close();// 断开连接，最好写上，disconnect是在底层tcp socket链接空闲时才切断。如果正在被其他线程使用就不切断。// 固定多线程的话，如果不disconnect，链接会增多，直到收发不出信息。写上disconnect后正常一些。conn.disconnect();// System.out.println("完整结束");DEBUGGER.info("调用app后台接口完整结束");} catch (Exception e) {e.printStackTrace();}return sb;} } |
springboot中使用（接口一）
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@RequestMapping(value = "/get_all_user", method = RequestMethod.POST) @ResponseBody public String get_all_user(HttpServletRequest request, HttpServletResponse response, Model model, AdminTbl admintabl,User user) { JSONObject result = new JSONObject();String[] args = { "admin_id"}; // 判断传来的数据是否为空 JSONObject nullcheck = ParamterNullCheck.getInstance().checkNull(admintabl, args);JSONObject param = null;param = (JSONObject) JSON.toJSON(user);DEBUGGER.info(param.toJSONString());if (nullcheck == null ) {// 查询该 用户是否有该权限admintabl.setUrl("/userInfo/get_all_user");RolePermissionTbl rpt = permissionService.get_permission(admintabl);if (rpt != null) {//调取接口 StringBuffer userlist= ToInterface.interfaceUtil("http://192.168.10.176:20000/user/getUserList",param.toJSONString(),"POST"); result.put("userlist", userlist);} else {result.put("msg", Constants.NO_AUTH);}}else {result = nullcheck;} return result.toJSONString(); } |
接口二
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@RequestMapping(value = "/getUserList", method = RequestMethod.POST)public ResponseEntity<Response> getUserList(@RequestBody UserPageDto data) { JSONObject result = new JSONObject();// 分页语句Page<Object> page = PageHelper.startPage(data.getPageNo(), 2);List<User> list = userService.getUserList(data);result.put("userlist", list); // 总记录数result.put("pagetotal", page.getTotal());return success(result);} |
接口的调用与调用别人的接口
此接口调用与被调用，都是在springMVC框架下使用参数以json格式传输。
别人调用我们的接口，与controller方法开发类似
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@RequestMapping("/otherUseMe.do")public void otherUseMe (HttpServletRequest request,HttpServletResponse response) throw IOException{ //基本设置 response.setContent("appliction/json;charset=utf-8"); //用来给对方传递参数 PrintWriter out = response.getWriter(); //系统错误，返回结果 Map<String,Object> exceptionMap = new HashMap<String,Object>(); exceptionMap.put("code","999"); //将错误代码转为json字符串 String exceptionStr = JSONObject.fromObject(excetionMap).toString(); //接收传来的参数 String name = request.getParameter("name"); String gender = request.getParameter("gender"); try{ boolean flag = "业务处理"; if(失败flag){ Map<String,Object> falseMap = new HashMap<String,Object>(); falseMap.put("code","998"); falseMap.put("result","fail"); falseMap.put("description","cry"); String falseStr = JSONObject(falseMap).toString(); out.write(falseStr); }else{ Map<String,Object> succMap = new HashMap<String,Object>(); falseMap.put("code","997"); falseMap.put("result","succ"); falseMap.put("description","smile"); String succStr = JSONObject(falseMap).toString(); out.write(succStr); } }catch(Exception e){ e.printStackTrace(); out.write(exceptionStr); return; }finally{ if(out!=null){ out.close(); } } |
我们调用别人的接口
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public boolean IUseOthers(String name,String gender){ HttpClient client = new HttpClient(); PostMethod postMethod = new PostMethod("http://111..111.11.11:8080/---");//写网址 postMethod.setRequestHeader("Content-type","application/x-www-form-urlencoded;charset=utf-8"); try{ postMethod.addParameter("name",name); postMethod.addParameter("gender",gender); int status = client.executeMethod(postMethod); //获取返回信息 JSONObject jsonObject = JSONObject.fromObject(postMethod.getResponBodyAsString().toString); String code = jsonObject.getString("code"); boolean flag = false; if("999".equals(code)){ flag =true; } }catch(HttpException e){ e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); }finally{ if(postMehod!=null){ postMehod.releaseConnection(); } } return flag; }} |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qq_33931552/article/details/80907462
