springMVC初步學習（3）

1.    3.0版本中替換讀取註解的兩個類，使用mvc標籤，如下：

        <!-- 註解掃描包 -->
	<context:component-scan base-package="com.study.controller.annotation"></context:component-scan>
	<!-- 開啓註解 -->
	<mvc:annotation-driven/>  <!-- 3.0版本後纔有 --> 
	
	<!--<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"></bean>
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> -->

      2.   在類上同樣能夠配置@RequestMaping，如下：

 

package com.study.controller.annotation;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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;


		/*
		 * @RequestMapping中的value值必須唯一
		 * 
		 * */

@Controller
@RequestMapping(value="/user")
public class UserController  {
					//可省略value不寫   	//刪除method值，則默認get、post都行
	@RequestMapping(value="/addUser",method=RequestMethod.GET)// http://localhost:8080/springMVC2/user/addUser
	public ModelAndView addUser(){
		
		return new ModelAndView("/welcome","result","addUser");
	}
	
	@RequestMapping(value="/delUser",method=RequestMethod.GET)// http://localhost:8080/springMVC2/user/delUser
	public ModelAndView delUser() {
		return new ModelAndView("/welcome","result","delUser");
	}
	
	// 可以使用String代替ModelAndView
	@RequestMapping("/goodUser")
	public String goodUser(HttpServletRequest request,HttpServletResponse response){
		request.setAttribute("result", "goodUser");
		return "/welcome";
	}
		

}

注：goodUser()方法的配置算是一種較爲理想的配置，所寫代碼非常少，而且簡單。