搭建SpringMVC (Java配置)

来源：互联网发布：门徒知乎编辑：程序博客网时间：2024/06/04 08:03

配置DispatcherServlet

DispatcherServlet的是SpringMVC的核心。在这里请求会第一次接触都框架，它要负责将请求路由到其他的组件之中。

使用Java配置将DispatcherServlet配置在Servlet容器中。

WebAppInitializer.java

/** * 配置DispatcherServlet *  * @author wxz * */public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{    /**     * 此方法返回的带有@Configuration注解的类将会用来配置ContextLoaderListener创建的应用上下文中的Bean     */    @Override    protected Class<?>[] getRootConfigClasses() {        return new Class<?>[] {RootConfig.class};    }    /**     * 当DispatcherServlet启动的时候，它会创建Spring应用上下文，并加载配置文件或配置类中所声明的Bean。     * DispatcherServlet加载应用上下文时，使用定义在WebConfig配置类中的Bean     *      */    @Override    protected Class<?>[] getServletConfigClasses() {        return new Class<?>[] {WebConfig.class}; // 指定配置类    }    /**     * 将一个或多个路径映射到DispatcherServlet上     */    @Override    protected String[] getServletMappings() {        return new String[] {"/"}; // 将dispatcherServlet映射到“/”    }}

启用SpringMVC

WebConfig.java

@Configuration@EnableWebMvc // 启用SpringMVC@ComponentScan("com.sosweet") // 启用组件扫描public class WebConfig extends WebMvcConfigurerAdapter{    /** 视图解析器 */    @Bean    public InternalResourceViewResolver viewResolver(){        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();        viewResolver.setPrefix("/WEB-INF/classes/views/"); // 运行时的目录结构        viewResolver.setSuffix(".jsp");        viewResolver.setViewClass(JstlView.class);        return viewResolver;    }    /** 配置静态资源的处理 */    @Override    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer){        configurer.enable();    }}

RootConfig.java

@Configuration@ComponentScan(basePackages={"com.sosweet"}, excludeFilters={        @Filter(type=FilterType.ANNOTATION, value=EnableWebMvc.class)})public class RootConfig {}

web.xml 的Schema必须是3.0+的

<?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"    id="WebApp_ID" version="3.0">  <display-name>Archetype Created Web Application</display-name></web-app>

完整的项目目录结构：

这里写图片描述

pom.xml

        <!-- Spring 4.3.3 -->        <!-- Core Container 核心容器 -->        <!-- 核心工具类，Spring其它模块大量使用Spring-core -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 运行时Spring容器 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- Spring容器对第三方包的集成 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context-support</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- Spring定义Bean的支持 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 使用表达式语言在运行时查询和操作对象 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-expression</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- End Core Container 核心容器 -->        <!-- AOP -->        <!-- 基于代理的AOP支持 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aop</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 基于AspectJ的AOP支持 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aspects</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- aspectj -->        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjrt</artifactId>            <version>1.8.5</version>        </dependency>        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjweaver</artifactId>            <version>1.8.5</version>        </dependency>        <!-- End AOP -->        <!-- web -->        <!-- 提供基础的web集成的功能，在web项目中提供Spring容器 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 提供基于Servlet的SpringMVC -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 提供WebSocket功能 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-websocket</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- 提供Portlet环境支持 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc-portlet</artifactId>            <version>4.3.3.RELEASE</version>        </dependency>        <!-- End web -->        <!-- End Spring 4.0 -->        <dependency>            <groupId>commons-io</groupId>            <artifactId>commons-io</artifactId>            <version>2.3</version>        </dependency>        <!-- javax -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>        </dependency>

        <plugins>            <plugin>                <artifactId>maven-compiler-plugin</artifactId>                <version>2.3.2</version>                <configuration>                    <source>1.8</source>                    <target>1.8</target>                    <encoding>UTF-8</encoding>                </configuration>            </plugin>        </plugins>

添加Servlet、Filter、Listener

想往Web容器中注册其他组件的话，只需创建一个新的初始化器就可以了。最简单的方式就是实现Spring的WebApplicationInitializer接口。

public class MyServletInitializer implements WebApplicationInitializer{    @Override    public void onStartup(ServletContext servletContext) throws ServletException {        // TODO Auto-generated method stub    }}

添加Servlet

public class MyServletInitializer implements WebApplicationInitializer{    @Override    public void onStartup(ServletContext servletContext) throws ServletException {        ServletRegistration.Dynamic myServlet = servletContext.addServlet("myServlet", MyServlet.class); // 注册Servlet        myServlet.addMapping("/custom/**"); // 映射Servlet    }}

添加Filter

public class MyServletInitializer implements WebApplicationInitializer{    @Override    public void onStartup(ServletContext servletContext) throws ServletException {        /** 注册Servlet */        ServletRegistration.Dynamic myServlet = servletContext.addServlet("myServlet", MyServlet.class); // 注册Servlet        myServlet.addMapping("/custom/**"); // 映射Servlet        /** 注册Filter */        FilterRegistration.Dynamic myFilter = servletContext.addFilter("myFilter", MyFilter.class); // 注册Filter        myFilter.addMappingForUrlPatterns(null, false, "/custom/**"); // 添加Filter的映射路径    }}

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