rest入门实践之二：get/post/put/delete

第一步：同样创建相应webservice工程

第二步：代码：

package com.rest.hello;

import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;

@Path("hello")
public class Hello {

    @GET  //查询
    @Path("doGet")
    public String doGet(@QueryParam("id") String id) {
        System.out.println("doGet");
        return id + "-doGet-" + "person";
    }

    @POST  //创建
    @Path("doPost/{name}")
    public Object doPost(@PathParam("name") String name) {
        System.out.println("doPost");
        return "doPost -" + "create "+ name + "person";
    }

    @DELETE
    @Path("doDelete")
    public String doDelete(@QueryParam("id") String id) {
        System.out.println("doDelete");
        return "doDelete - "+ "delete" + id + "person";
    }

    @PUT
    @Path("doPut/{newName}")
    public String doPut(@PathParam("newName") String newName) {
        System.out.println("doPut");
        return "doPut - " + "put" + "person name : " + newName;
    }
}

第三：发布服务，启动tomcat

第四步：前台：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
    <script type="text/javascript">
       var xmlhttp ;
       
       function createXMLHttp(){
           if(window.XMLHttpRequest){
               xmlhttp = new XMLHttpRequest();
           }else{
               xmlhttp = new ActiveXObject("Microsoft.xmlhttp");
           }
       };
       
       function clickChange(action,method){
           createXMLHttp();
           if(action == "doGet"){
               xmlhttp.open(method,"<%=basePath%>services/hello/"+action+"?id='mdj'",true);
           }else if(action == "doPost"){
               xmlhttp.open(method,"<%=basePath%>services/hello/"+action+"/mdj",true);
           }else if(action == "doPut"){
               xmlhttp.open(method,"<%=basePath%>services/hello/"+action+"/zyq",true);
           }else if(action == "doDelete"){
               xmlhttp.open(method,"<%=basePath%>services/hello/"+action+"?id='zyq'",true);
           }
           
           xmlhttp.onreadystatechange = clickChangeCallBack;
           xmlhttp.send(null);
       }
       
       function clickChangeCallBack(){
           if(xmlhttp.status == 200){
               if(xmlhttp.readyState == 4){
                   alert(xmlhttp.responseText);
               }
           }
       }
    
    </script>
  </head>
  
  <body>
      <a onclick="clickChange('doGet','get')">get操作</a>
      <a onclick="clickChange('doPost','post')">post操作</a>
      <a onclick="clickChange('doPut','put')">put操作</a>
      <a onclick="clickChange('doDelete','delete')">delete操作</a>
  </body>
</html>

第5步访问：http://localhost/RestPractice2/

第6步：结果如下：

TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST