SpringMVC学习（三）——基于注解配置的springMVC项目

可运行的附件地址：http://files.cnblogs.com/files/douJiangYouTiao888/springWithAnnotation.zip

项目说明：

作者环境：maven3+jdk1.8+spring4

项目结构：

父pom配置：

<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/xsd/maven-4.0.0.xsd">
    <!-- 基础组件模块，定义各种公用的组件 -->
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.wang</groupId>
    <artifactId>basicmodule</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>
    <name>basicmodule</name>
    <url>http://maven.apache.org</url>
    <!-- 常量属性 -->
    <properties>
        <!-- 编码集 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <!-- spring版本 -->
        <springframework.version>4.3.7.RELEASE</springframework.version>
    </properties>
    <!-- 模块定义 -->
    <dependencyManagement>
        <dependencies>
            <!-- spring模块 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${springframework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${springframework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${springframework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${springframework.version}</version>
            </dependency>
            <!-- servlet-api -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>3.1.0</version>
                <!-- <scope>provide</scope> -->
            </dependency>
            <!-- jstl，需要引入jstl.jar和standard.jar -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            <!-- <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>3.1.0</version>
                <scope>provide</scope>
            </dependency> -->
        </dependencies>
    </dependencyManagement>

</project>

pom配置：

<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.wang</groupId>
    <artifactId>springWithAnnotation</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>springWithAnnotation Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <!-- 父模块，基础模块 -->
    <parent>
        <groupId>com.wang</groupId>
        <artifactId>basicmodule</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <!-- servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <!-- jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
    </dependencies>
    <build>
        <finalName>springWithAnnotation</finalName>
    </build>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.0" 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_3_0.xsd">
    <!--
        源码：spring-web.jar 
        功能：字符集过滤器，设置编码集为UTF-8，解决POST的中文乱码问题。
        参数说明：
            encoding：request的编码集(request.setCharacterEncoding("UTF-8"))
            forceEncoding：默认为false设置为true，response的编码集也强制转变成UTF-8(response.setCharacterEncoding("UTF-8"))
    -->
    <filter>
        <filter-name>encodingFilter</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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 
        源码：spring-web.jar
        默认配置：/WEB-INF/${servlet-name}-servlet.xml，即/WEB-INF/springmvc.xml
        覆盖默认配置：初始化参数：contextConfigLocation，参数多个值使用逗号隔开，如：a.xml,b.xml
     -->
    <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*:conf/springmvc-annotationconfig.xml</param-value>
        </init-param>
        <!-- 容器初始化加载此servlet -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!-- 
            一般有以下写法：
            *.do    拦截固定格式的请求
            /        rest风格的写法：拦截所有资源，需要针对静态资源做单独处理
            /*        错误写法：会在处理完请求后拦截jsp导致404错误
         -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>  

springmvc核心配置文件：springmvc-annotationconfig.xml

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd  
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
    <!-- 扫描的包 -->
    <context:component-scan base-package="com.wang"></context:component-scan>
    <!-- 自动装载注解的配置HandlerMapping和HandlerAdapter -->
    <mvc:annotation-driven/>
    
    <!-- 视图解析类类 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

java类：

package com.wang.action;

import java.util.HashMap;
import java.util.Map;
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.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.wang.service.WangService;

@Controller
public class WangAction {

    @Autowired
    private WangService wangService;
    @RequestMapping("/sb.do")
    public ModelAndView doTest(@RequestParam(value="name",defaultValue="wang")String aaa,@RequestParam("age")int bbb){
        System.err.println("name:" + aaa + ",age:" + bbb);
        Map<String, Object> maps = new HashMap<String, Object>();
        String result = wangService.doTest();
        maps.put("a", result);
        return new ModelAndView("/index",maps);
    } 
}

package com.wang.service;

import org.springframework.stereotype.Service;

@Service
public class WangService {
    
    public String doTest(){
        return "wly";
    }
}

测试URL：

　　http://localhost:8088/sb.do?name=wly&age=500

OK，大功告成~