【Java学习20170524】SpringMVC

最新推荐文章于 2024-10-18 17:04:14 发布

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#servlet #spring mvc #web.xml #java web #java

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SpringMVC总结

SpringMVC
1、配置web.xml，用一个servlet拦截所有请求【.do】,如果需要设置配置文件的位置及名称
2、创建springMVC的配置文件
1）、将uri连接对应的控制器
HandlerMapping
HandlerAdapter
2）、给控制器设置资源视图的位置【前缀，后缀】

SpringMVC_1

配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">
	<display-name>SpringMVC_1</display-name>
	
	<servlet>
		<!-- 名字要配置为项目名 -->
		<servlet-name>SpringMVC_1</servlet-name>
		<!-- DispatcherServlet:是Spring提供的servlet
		DispatcherServlet是Spring的前端控制器 -->
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<!-- SpringMVC_1:项目名 -->
		<servlet-name>SpringMVC_1</servlet-name>
		<!-- 决定哪些网络请求交给springMVC控制器来处理，“/” 是用来定义默认servlet映射的。也可以如“*.html”表示拦截所有以html为扩展名的请求。 -->
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

配置SpringMVC_1-servlet.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-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

	<!-- 下面两段配置是固定格式 -->
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

	
	<!-- 配置控制器的Bean节点(在spring的配置文件中，注册自己定义的控制器).
	     name:控制器的路径， class:控制器的包名与类名 -->
	<bean name="/HelloWord.do" class="com.share.controller.MyController"/>
	
	<!-- 这里的class属性是固定写法 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!--JstlView表示JSP模板页面需要使用JSTL标签库，classpath中必须包含jstl的相关jar包 -->
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
		
		<!-- 查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀），比如传进来的逻辑 视图名为hello，则该jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp” -->
		<property name="prefix" value="/page/" />
		<property name="suffix" value=".jsp" />
	</bean>


</beans>

controller

package com.share.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class MyController implements Controller{

	@Override
	public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
		// TODO Auto-generated method stub
		//ModelAndView view = new ModelAndView();
		//setViewName():相当于请求转发， 这是转发到helloword中
		// /WEB-INF/jsp/helloword.jsp
		//view.setViewName("helloword");
		
		ModelAndView view = new ModelAndView("helloword");
		return view;
	}

}

SpringMVC_2

配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>SpringMVC_2</display-name>
  <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:config/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

配置spring-mvc.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-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

	<!-- 下面两段配置是固定格式 -->
	<!-- <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" /> -->
	
	<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<!-- 控制器的访问路径, HelloWord.do:控制器的名称 -->
				<prop key="/hello.do">abc</prop>
				<prop key="/second">second</prop>
			</props>
		</property>
	</bean>

	<!-- 配置控制器的Bean节点(在spring的配置文件中，注册自己定义的控制器).
	     name:控制器的路径， class:控制器的包名与类名 -->
	<bean name="abc" class="com.share.controller.MyController"/>
	<bean name="second" class="com.share.controller.Second"/>
	
	
	<!-- 这里的class属性是固定写法 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!--JstlView表示JSP模板页面需要使用JSTL标签库，classpath中必须包含jstl的相关jar包 -->
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
		
		<!-- 查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀），比如传进来的逻辑 视图名为hello，则该jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp” -->
		<property name="prefix" value="/page/" />
		<property name="suffix" value=".jsp" />
	</bean>


</beans>

controller

package com.share.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class MyController implements Controller{

	@Override
	public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
		// TODO Auto-generated method stub
		//ModelAndView view = new ModelAndView();
		//setViewName():相当于请求转发， 这是转发到helloword中
		// /WEB-INF/jsp/helloword.jsp
		//view.setViewName("helloword");
		
		ModelAndView view = new ModelAndView("helloword");
		return view;
	}
}

package com.share.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class Second implements Controller {

	@Override
	public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
		ModelAndView view = new ModelAndView();
		view.setViewName("second");
		return view;
	}

}

SpringMVC_3 注解配置

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>SpringMVC_3</display-name>
  
  <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
    	<!-- contextConfigLocation:不能修改 -->
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:config/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

spring-mvc.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-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

	<!-- base-package="com.share.controller"为设置需要进行注解扫描的包-->
	<context:component-scan base-package="com.share.controller" />
	
	<!-- 开启Spring的注解 -->
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />



	<!-- 这里的class属性是固定写法 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!--JstlView表示JSP模板页面需要使用JSTL标签库，classpath中必须包含jstl的相关jar包 -->
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />

		<!-- 查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀），比如传进来的逻辑 视图名为hello，则该jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp” -->
		<property name="prefix" value="/page/" />
		<property name="suffix" value=".jsp" />
	</bean>


</beans>

controller

package com.share.controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

/**
 * @Controller：当前类是控制器
 * */
@Controller
public class MyController {
	/**
	 * @RequestMapping:设置控制器的访问路径
	 * 浏览器通过/hello直接可访问
	 * */
	@RequestMapping(value = "/hello")
	public ModelAndView abc(){
		System.out.println("这是注解的控制器");
		ModelAndView view = new ModelAndView();
		//转发到first
		view.setViewName("first");
		return view;
	}
	/**
	 * 通过浏览器直接访问/second
	 * */
	@RequestMapping(value = "/second")
	public ModelAndView bcd(){
		ModelAndView view = new ModelAndView();
		view.setViewName("sencond");
		System.out.println("第二个页面");
		return view;
	}
}