SpringMVC框架初步

需要节点：

<dependencies>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>3.8.1</version>
    <scope>test</scope>
  </dependency>
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>
  <!--beans  自动将依赖的core引入了-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.2.3.RELEASE</version>
  </dependency>
  <!--context 依赖N个-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.2.0.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
  </dependency>
  <!--织入的依赖-->
  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.8.7</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>
  <!--Servlet API-->
  <dependency>
    <groupId>javaee</groupId>
    <artifactId>javaee-api</artifactId>
    <version>5</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.10.RELEASE</version>
  </dependency>
</dependencies>
<build>
  <resources>
    <resource>
      <directory>src/main/java</directory>
      <includes>
        <include>**/*.xml</include>
      </includes>
    </resource>
  </resources>
</build>

web.xml配置

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <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:springMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--对静态资源访问方式二-->
    <!--<servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.jpg</url-pattern>
    </servlet-mapping>-->
</web-app>

FirstController 类

public class FirstController implements Controller {
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView mv=new ModelAndView();
        mv.addObject("uname","小仙女");
        mv.setViewName("/index");
        return mv;
    }
}

springMVC.xml

<bean id="test01" class="cn.ljl.controller.FirstController"></bean>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/"/>
    <property name="suffix" value=".jsp"/>
</bean>
<!--对静态资源访问方式一-->
<!-- <mvc:default-servlet-handler/>-->
<!--对静态资源访问方式三-->
<mvc:resources location="/img/" mapping="/img/**"></mvc:resources>

<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>

<!---->
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <!--<property name="mappings">
        <props>
            <prop key="/hello">test01</prop>
            <prop key="/ljl">test01</prop>
        </props>
    </property>-->
    <property name="urlMap">
        <map>
            <entry key="/hello" value="test01"></entry>
            <entry key="/haha" value="test01"></entry>
        </map>
    </property>
</bean>

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<body>
<h2>我还是很喜欢你 像风走了八千里 不问归期</h2>
<h3>${uname}</h3>
<img src="img/01.jpg"/>
</body>
</html>

在换另一个配置时，在web.xml中更改

<init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springMVC02hander.xml</param-value>
        </init-param>

在类中更改：

public class SecondController extends AbstractController{
    protected ModelAndView handleRequestInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView mv=new ModelAndView();
        mv.addObject("uname","你是不是傻");
        mv.setViewName("/index");
        return mv;
    }
}