接口的调用与被调用案例

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

@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
 public boolean IUseOthers(String name,String gender){
  HttpClient client = new HttpClient();
  PostMethod postMethod = new PostMethod("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; 
 }
 
}