<style>
*{
   font-size:18px;
}
table.t2{
   border-collapse:collapse;
}
td{
  text-align:left;
}

</style>
 
<table class="t2" border="1" width="100%">
   <tr>
      <td ></td>
      <td colspan="2" >传统风格</td>
      <td colspan="2">Restful风格</td>
   </tr>
    <tr>
      <td ></td>
      <td  width="380px" >url</td>
      <td  >method</td>
      <td  >url</td>
      <td  >method</td>
   </tr> 
   <tr>
      <td >增加</td>
      <td >/addCategory?name=xxx</td>
      <td >POST</td>
      <td >/categories</td>     
      <td >POST</td>
   </tr>
    <tr>
      <td >删除</td>
      <td >/deleteCategory?id=123</td>
      <td >GET</td>
      <td >/categories/123</td>     
      <td >DELETE</td>
   </tr>
     <tr>
      <td >修改</td>
      <td >/updateCategory?id=123&name=yyy</td>
      <td >POST</td>
      <td >/categories/123</td>     
      <td >PUT</td>
   </tr>
     <tr>
      <td >获取</td>
      <td >/getCategory?id=123</td>
      <td >GET</td>
      <td >/categories/123</td>     
      <td >GET</td>
   </tr>
   <tr>
      <td >查询</td>
      <td >/listCategory</td>
      <td >GET</td>
      <td >/categories</td>     
      <td >GET</td>
   </tr>    
</table>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xmlns="http://java.sun.com/xml/ns/javaee" 
         xmlns:web="http://java.sun.com/xml/ns/javaee" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
	
	<!-- spring的配置文件-->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<filter>
	   <filter-name>HiddenHttpMethodFilter</filter-name>
	   <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
	</filter>
	<filter-mapping>
	   <filter-name>HiddenHttpMethodFilter</filter-name>
	   <url-pattern>/*</url-pattern>
	</filter-mapping>
		
	<filter>  
        <filter-name>CharacterEncodingFilter</filter-name>  
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
        <init-param>  
            <param-name>encoding</param-name>  
            <param-value>utf-8</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>CharacterEncodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>     
    	
	<!-- spring mvc核心：分发servlet -->
	<servlet>
		<servlet-name>mvc-dispatcher</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- spring mvc的配置文件 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:springMVC.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>mvc-dispatcher</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
</web-app>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
 <script type="text/javascript" src="js/jquery.min.js"></script>
 
    <script type="text/javascript">
       /*将post method 改变为delete*/
      $(function(){                     
    	   $(".delete").click(function(){
    		   var href=$(this).attr("href");
    		   $("#formdelete").attr("action",href).submit();
    		   return false;
    	   })
       }) 
   </script>
   
 <div style="width:500px;margin:0px auto;text-align:center">
	<table align='center' border='1' cellspacing='0'>
	    <tr>
	        <td>id</td>
	        <td>name</td>
	        <td>编辑</td>
	        <td>删除</td>
	    </tr>
	    <c:forEach items="${cs}" var="c" varStatus="st">
	        <tr>
	            <td>${c.id}</td>
	            <td>${c.name}</td>
	            <td><a href="categories/${c.id}">编辑</a></td>
	            <td><a class="delete" href="categories/${c.id}">删除</a></td>
	        </tr>
	    </c:forEach>
	</table>
	<div style="text-align:center">
		<a href="?start=0">首  页</a>
		<a href="?start=${page.start-page.count}">上一页</a>
		<a href="?start=${page.start+page.count}">下一页</a>
		<a href="?start=${page.last}">末  页</a>
	</div>
	
	<div style="text-align:center;margin-top:40px">
		<form method="POST" action="categories">
				分类名称： <input name="name" value="" type="text"> <br><br>
				<input type="submit" value="增加分类">
		</form>
	</div>	
 </div>

    <form id="formdelete" action="" method="POST" >
       <input type="hidden" name="_method" value="DELETE">
   </form>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
 <div style="width:500px;margin:0px auto;text-align:center">
	<div style="text-align:center;margin-top:40px">
		<form method="post" action="../categories/${c.id}">
			<input type="hidden" name="_method" value="PUT">
			分类名称： <input name="name" value="${c.name}" type="text"> <br><br>
			<input type="submit" value="修改分类">
		</form>

	</div>	
 </div>

package com.how2java.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.how2java.pojo.Category;
import com.how2java.service.CategoryService;
import com.how2java.util.Page;

// 告诉spring mvc这是一个控制器类
@Controller
@RequestMapping("")
public class CategoryController {
	@Autowired
	CategoryService categoryService;

	@RequestMapping(value="/categories",method=RequestMethod.GET)
	public ModelAndView listCategory(Page page){
	
		ModelAndView mav = new ModelAndView();
		List<Category> cs= categoryService.list(page);
		int total = categoryService.total();
		
		page.caculateLast(total);
		
		// 放入转发参数
		mav.addObject("cs", cs);
		// 放入jsp路径
		mav.setViewName("listCategory");
		return mav;
	}
	
	@RequestMapping(value="/categories",method=RequestMethod.POST)
	public ModelAndView addCategory(Category category){
		System.out.println("category.getName():"+category.getName());
		categoryService.add(category);
		ModelAndView mav = new ModelAndView("redirect:/categories");
	    return mav;
	}	
	
	@RequestMapping(value="/categories/{id}",method=RequestMethod.DELETE)
	public ModelAndView deleteCategory(Category category){
		categoryService.delete(category);
		ModelAndView mav = new ModelAndView("redirect:/categories");
		return mav;
	}	
	@RequestMapping(value="/categories/{id}",method=RequestMethod.GET)
	public ModelAndView editCategory(Category category){
		Category c= categoryService.get(category.getId());
		ModelAndView mav = new ModelAndView("editCategory");
		mav.addObject("c", c);
		return mav;
	}	
	@RequestMapping(value="/categories/{id}",method=RequestMethod.PUT)
	public ModelAndView updateCategory(Category category){
		categoryService.update(category);
		ModelAndView mav = new ModelAndView("redirect:/categories");
		return mav;
	}	

}