springMVC(7) springMVC注解启用

最新推荐文章于 2022-11-12 18:53:04 发布

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最新推荐文章于 2022-11-12 18:53:04 发布

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分类专栏： SpringMVC学习笔记

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本文详细介绍了在Spring MVC中使用注解进行控制器配置的方法，包括如何配置注解适配器和映射器，以及如何在页面上显示通过注解处理的请求结果。同时，展示了GET和POST请求方式的示例。

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在spring-annotation中如下配置：

【注意】：

在spring3.1之前使用org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping注解映射器。

在spring3.1之后使用org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping注解映射器。

在spring3.1之前使用org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter注解适配器。

在spring3.1之后使用org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter注解适配器。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans    
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    
      http://www.springframework.org/schema/context    
      http://www.springframework.org/schema/context/spring-context.xsd    
      http://www.springframework.org/schema/mvc    
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
      
	<context:component-scan base-package="com.xdy.controller.annotation"></context:component-scan>

	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
	<!-- 配置解析器 -->
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

Web.xml里配置初始参数文件名：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  
  <servlet>
  	<servlet-name>springMVC</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath*:config/spring-annotation.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>springMVC</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

UserController里添加注解：

package com.xdy.controller.annotation;

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 org.springframework.web.servlet.mvc.multiaction.MultiActionController;

@Controller
public class UserController extends MultiActionController{
	
	@RequestMapping(value="/user/addUser",method=RequestMethod.GET)
	public ModelAndView addUser(){
		String result = "The method is addUser.";
		return new ModelAndView("/annotation", "result", result);
	}
	

	@RequestMapping(value="/user/delUser",method=RequestMethod.GET)
	public ModelAndView delUser(){
		String result = "The method is delUser.";
		return new ModelAndView("/annotation", "result", result);
	}
}

页面输出其结果：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>springMVC开启注解</title>
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
  </head>
  <body>
    <h1>springMVC开启注解</h1>
    <div>
    	${result }
    </div>
  </body>
</html>

访问结果：

Post方式提交注解示例

@RequestMapping(value="/user/addUser",method=RequestMethod.POST)
	public ModelAndView addUser(){
		String result = "The method is addUser.";
		return new ModelAndView("/annotation", "result", result);
	}

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>springMVC开启注解</title>
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
  </head>
  <body>
    <h1>springMVC开启注解</h1>
    <form action="/springMvc4/user/addUser" method="post">
	    <div>
	    	${result }
	    </div>
	    <input type="submit" value="post提交">
    </form>
  </body>
</html>