SpringMVC环境搭建

淡淡的烟草味﹌ 2022-05-08 09:52 185阅读 0赞

## 使用注解 ##

1 导入jar

2 在wel.xml中配置前端控制器

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="4.0" 
    	xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee                       
    	http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd">
    	
    	<servlet>
    		<servlet-name>jqk</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>jqk</servlet-name>
    		<url-pattern>/</url-pattern>
    	</servlet-mapping>
    </web-app>

如果不配置<init-param>，会寻找/WEB-INF/<servlet-name>-servlet.xml文件

3 在src下新建springmvc.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.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd">
            
            
            <context:component-scan base-package="com.lee.controller"></context:component-scan>
            
            
                            
           	<mvc:annotation-driven></mvc:annotation-driven>
           	
           	<mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
           	<mvc:resources location="/css/" mapping="/css/**"></mvc:resources>
           	<mvc:resources location="/image/" mapping="/image/**"></mvc:resources>
           	<mvc:resources location="/WEB-INF/js/" mapping="/abc/**"></mvc:resources>
    </beans>

4 编写控制器类

@Controller
    public class DemoController {
    	@RequestMapping("demo")
    	public String demo() {
    		System.out.println("执行demo");
    		return "main.jsp";
    	}
    	
    	@RequestMapping("demo2")
    	public String demo2() {
    		System.out.println("执行demo");
    		return "main2.jsp";
    	}
    }

## 不使用注解 ##

springmvc.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"
        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">
            <bean id="demo123" class="com.lee.controller.DemoController"></bean>
            <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
            	<property name="urlMap">
            		<map>
            		
            			<entry key="demo" value-ref="demo123"></entry>        			
            		</map>        	
            	</property>
            </bean>        
            <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
            <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            	<property name="prefix" value=""></property>
            	<property name="suffix" value=".jsp"></property>
            </bean>
    </beans>

控制器类

public class DemoController implements Controller{
    
    	@Override
    	public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
    		System.out.println("执行了springmvc控制器");
    		ModelAndView mav = new ModelAndView("main");//默认为转发跳转
    		return mav;
    	}
    }