SpringMVC整合Servlet3.0

Z时代
2024-01-10
分类：综合

工程目录结构

MyWebApplicationInitializer.class


/**
 * web容器启动的时候创建对象，调用方法来初始化容器的前端控制器
 */
public class MyWebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    /**
     * 获取根容器的配置类（Spring的配置文件）父容器
     */
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{RootConfig.class};
    }
    /**
     * 获取web容器的配置类（SpringMVC的配置文件）子容器
     */
    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{AppConfig.class};
    }
    /**
     * 获取DispatcherServlet的映射信息
     * 拦截所有请求，包括静态资源xx.js,xx.jpg...，但是不包括*.jsp
     * /*拦截所有请求，连*.jsp都会拦截，jsp页面是tomcat的引擎解析的
     * 写成/就行
     */
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

AppConfig.class


/**
 * springmvc只扫描Controller，子容器
 * useDefaultFilters = false，禁用默认的过滤规则
 */
@ComponentScan(value = "com.lun", includeFilters = {
        @Filter(type = FilterType.ANNOTATION, value = {Controller.class})
}, useDefaultFilters = false)
@Configuration
public class AppConfig {
}

RootConfig

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

HelloController.class


@Controller
public class HelloController {
    @Autowired
    private HelloService helloService;
    @ResponseBody
    @RequestMapping("hello")
    public String hello() {
        helloService.sayHello("world");
        return "success";
    }
}

HelloService.class

@Service
public class HelloService {
    public void sayHello(String name) {
        System.out.println("hello," + name);
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.lun</groupId>
    <artifactId>springmvc-annotation</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.23.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>