2.Spring MVC实现代码

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.my.dailyUtils</groupId>
    <artifactId>dailyUtils</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>dailyUtils</name>
    <url>http://maven.apache.org</url>
    <build>
        <finalName>dailyUtils</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <properties>
        <spring.version>4.2.5.RELEASE</spring.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version} </version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--使用AspectJ方式注解需要相应的包 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.11</version>
        </dependency>
        <!--使用AspectJ方式注解需要相应的包 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.11</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

<?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"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>Daily Utils Application</display-name>
    
  <!--1. 配置前端控制器DispatcherServlet -->
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--springmvc.xml 是自己创建的SpringMVC全局配置文件，用contextConfigLocation作为参数名来加载
        如果不配置 contextConfigLocation，那么默认加载的是/WEB-INF/servlet名称-servlet.xml，在这里也就是 springmvc-servlet.xml
      -->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:config/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
 
 <!-- 配置要拦截的URL -->
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <!--第一种配置：*.do,还可以写*.action等等，表示以.do结尾的或者以.action结尾的URL都由前端控制器DispatcherServlet来解析
        第二种配置：/,所有访问的 URL 都由DispatcherServlet来解析，但是这里最好配置静态文件不由DispatcherServlet来解析
        错误配置：/*,注意这里是不能这样配置的，应为如果这样写，最后转发到 jsp 页面的时候，仍然会由DispatcherServlet进行解析，
                    而这时候会找不到对应的Handler，从而报错！！！
      -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>    

    <!--2. spring context 配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:config/app-context.xml</param-value>
    </context-param>

    <!-- 3.spring 监听器配置 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
    <!--spring 防内存溢出监听器 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    
    <!-- 5.公共界面配置 -->
    <welcome-file-list>
        <welcome-file>/welcome.jsp</welcome-file>
    </welcome-file-list>
     
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
    <!--注解处理器映射器 -->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean> -->

    <!--注解处理器适配器-->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean> -->

    <!--使用mvc:annotation-driven可以代替上面的映射器和适配器
        这里面会默认加载很多参数绑定方法，比如json转换解析器就默认加载，所以优先使用下面的配置
      -->
      
    <mvc:annotation-driven />
    <context:annotation-config />
    <mvc:default-servlet-handler />

    <!--单个配置Handler -->
    <!-- <bean class="com.my.controller.UserController"></bean> -->

    <!--批量配置Handler,指定扫描的包全称 -->
    <!--添加component扫描，使package下面的注解生效 -->
    <context:component-scan base-package="com.my.controller" />

    <!--添加页面视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/js/" />
        <property name="suffix" value=".jsp" />
        <property name="contentType" value="text/html;charset=UTF-8" />
    </bean>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context-4.2.xsd
            http://www.springframework.org/schema/mvc 
            http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
            http://www.springframework.org/schema/aop 
            http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context-4.2.xsd">
    <context:annotation-config />    
    
    <bean id="bird" class="com.my.entity.Bird" scope="singleton"
        init-method="initBean" destroy-method="destroy" autowire="byName">
        <property name="bridName" value="&lt;&gt;" />
        <property name="color">
            <value><![CDATA[<Blue>]]></value>
        </property>
    </bean>
</beans>

package com.my.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping(value = "/next")
public class ModelController {
    
    @RequestMapping(value="/more")
    public ModelAndView returnModel(){
        ModelAndView model = new ModelAndView();
        model.setViewName("index"); 
　　　　 model.addObject("message", "This is a test!");       
        return model;
    }

}

package com.my.controller;

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping(value = "/user")
public class UserController {
    @RequestMapping(value = "/test")
    public String recruitdemand(final HttpServletRequest request, final HttpServletResponse response) {
        request.setAttribute("message", "This is a test!");return "index";
    }

}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>index</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>