介面的呼叫與被呼叫案例
此介面呼叫與被呼叫，都是在springMVC框架下使用
引數以json格式傳輸。
別人呼叫我們的介面，與controller方法開發類似
@RequestMapping("/otherUseMe.do")
public void otherUseMe (HttpServletRequest request,HttpServletResponse response) throw IOException{
//基本設定
response.setContent("appliction/json;charset=utf-8");
//用來給對方傳遞引數
PrintWriter out = response.getWriter();
//系統錯誤，返回結果
Map<String,Object> exceptionMap = new HashMap<String,Object>();
exceptionMap.put("code","999");
//將錯誤程式碼轉為json字串
String exceptionStr = JSONObject.fromObject(excetionMap).toString();
//接收傳來的引數
String name = request.getParameter("name");
String gender = request.getParameter("gender");
try{
boolean flag = "業務處理";
if(失敗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();
}
}
//我們呼叫別人的介面
public boolean IUseOthers(String name,String gender){
HttpClient client = new HttpClient();
PostMethod postMethod = new PostMethod("
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);
//獲取返回資訊
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;
}
}