初试Spring MVC

时间: 2020-09-19｜60次围观｜0 条评论

新建SpringMVC工程

初试Spring MVC插图

初试Spring MVC插图1

初试Spring MVC插图2

目录结构

初试Spring MVC插图3

操作流程

pom.xml

<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.springapp</groupId>
    <artifactId>DemoSpringMVC</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>DemoSpringMVC</name>

    <properties>
        <spring.version>3.2.0.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.8.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>DemoSpringMVC</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <includes>
                        <include>**/*Tests.java</include>
                    </includes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Spring MVC Application</display-name>

    <!--注册SpringMVC的核心控制器-->
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- 回去寻找/WEB-INF/<servlet-name>-servlet.xml文件 -->
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
       <!--<url-pattern>/</url-pattern>-->
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>

</web-app>

初试Spring MVC插图4

mvc-dispatcher-servlet.xml

<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" 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.xsd">

    <!-- 注册Action class表示处理类的全路径 name表示请求路径 -->
    <bean name="/hello.action" class="com.springapp.mvc.HelloController"></bean>

</beans>

hello.jsp

<%@ page language="java" pageEncoding="UTF-8" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <body>
        hello.jsp<br/>
        成功<br/>
        request:${requestScope.massage}<br/>
        request:${requestScope.hello}
    </body>
</html>

HelloController.java

package com.springapp.mvc;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/** * 控制器Action * 处理器Action * Created by liguodong on 2015/11/16. */
public class HelloController implements Controller {

    static int num = 0;
    public HelloController(){
        System.out.println("这是一个单例，只会创建一次。HelloController的hashCode是："+this.hashCode());
    }


    /** * 业务方法 * @param httpServletRequest * @param httpServletResponse * @return * @throws Exception */
    @Override
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest,
                                      HttpServletResponse httpServletResponse)
            throws Exception {
        /** * ModelAndView表示向视图封装数据和路径 */
        ModelAndView modelAndView = new ModelAndView();

        modelAndView.addObject("hello","hello");
        modelAndView.addObject("massage","心好累，弄了半天。。。");


        System.out.println("第"+ (++num) +"请求。。。");

        //modelAndView.setViewName("redirect:/WEB-INF/pages/hello.jsp");
        //modelAndView.setViewName("forward:/hello");


        //modelAndView.setViewName("hello");
        modelAndView.setViewName("/WEB-INF/pages/hello.jsp");

        return modelAndView;
    }
}

执行结果

后端服务器

初试Spring MVC插图5

前端页面

初试Spring MVC插图6

配置映射器，适配器，视图解析器
mvc-dispatcher-servlet.xml


<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" 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.xsd">

    <!-- 注册Action class表示处理类的全路径 name表示请求路径 必选 -->
    <bean name="/hello.action" class="com.springapp.mvc.HelloController"></bean>

    <!-- 映射器 BeanNameUrlHandlerMapping表示将bean标签的name属性当做URL请求 可选 -->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>


    <!-- 适配器 SimpleControllerHandlerAdapter表示用于寻找实现了Controller接口的Action类 可选 -->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>

    <!-- 视图解析器 InternalResourceViewResolver表示通过ModelAndView对象中封装的视图名找到真正的页面 可选 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>

</beans>

原文链接：https://blog.csdn.net/scgaliguodong123_/article/details/49869695

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