Java-springMVC框架:springMVC简单搭建一

小咪咪 2022-07-13 12:10 265阅读 0赞

一个简单的MVC框架，基本要熟悉以下步骤

1：定义一个Controller类
    2：配置如何配置
    3：如何定义url地址 进入方法
    4：如何将查询的数据放入作用域(拿到request,response对象)
    5：如何返回页面，转发/重定向

springmvc的配置：

1: 引入jar包

commons-beanutils-1.8.0.jar
    	commons-fileupload-1.2.1.jar
    	commons-io-2.0.1.jar
    	commons-lang3-3.1.jar
    	commons-logging-1.1.3.jar
    	commons-pool-1.2.jar
    	spring-aop-4.1.5.RELEASE.jar
    	spring-aspects-4.1.5.RELEASE.jar
    	spring-beans-4.1.5.RELEASE.jar
    	spring-context-4.1.5.RELEASE.jar
    	spring-context-support-4.1.5.RELEASE.jar
    	spring-core-4.1.5.RELEASE.jar
    	spring-expression-4.1.5.RELEASE.jar
    	spring-web-4.1.5.RELEASE.jar
    	spring-webmvc-4.1.5.RELEASE.jar
    	spring-webmvc-portlet-4.1.5.RELEASE.jar

2：在web.xml定义Springmvc的核心类Servlet类

springmvc的配置和applicationContext.xml是一种父子关系	
    	 在web-inf下建立一个叫："servlet-name"-servlet.xml文件  zpupload-servlet.xml
    	 如果想改变名称：在servlet核心类中加入：
    	 <init-param>
    		<param-name>namespace</param-name>
    		<param-value>fylupload</param-value>
    	</init-param>
    	web.xml中所有代码如下：
    
    	
    <display-name>zpupload</display-name>
      <welcome-file-list>
      	<welcome-file>index.jsp</welcome-file>
      </welcome-file-list>
      
      
      <context-param>
      	<param-name>contextConfigLocation</param-name>
      	<param-value>classpath:applicationContext.xml</param-value>
      </context-param>
      
      <listener>
      	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
      
      <servlet>
      	<servlet-name>zpupload</servlet-name>
      	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      	<init-param>
      		<param-name>namespace</param-name>
      		<param-value>fylupload</param-value>
      	</init-param>
      </servlet>
      <servlet-mapping>
      	<servlet-name>zpupload</servlet-name>
      	<url-pattern>*.html</url-pattern>
      </servlet-mapping>
       
       
       
       <filter>
       	<filter-name>encoding</filter-name>
       	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
       	<init-param>
       		<param-name>encoding</param-name>
       		<param-value>UTF-8</param-value>
       	</init-param>
       </filter>
       <filter-mapping>
       	<filter-name>encoding</filter-name>
       	<url-pattern>/*</url-pattern>
       </filter-mapping>

3：配置fylupload.xml

<context:component-scan base-package="com.zp.upload"></context:component-scan>
         
         
         <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         	
         	<property name="prefix" value="/WEB-INF/pages/"></property>
         	
         	<property name="suffix" value=".jsp"></property>
         </bean>

4：定义一个类IndexController测试

package com.zp.upload;
    
    import java.util.HashMap;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    
    @Controller
    @RequestMapping("/upload")
    public class IndexController {
    
    	@RequestMapping("/test")
    	public String test() {
    		System.out.println("进来了嘛？？");
    		return null;
    	}
    
    	// http://localhost:8080/zpupload/upload/index1.html
    	@RequestMapping("/index1")
    	public String index1(HttpServletRequest request, HttpServletResponse response, HttpSession session) {
    		HashMap<String, Object> map = new HashMap<>();
    		map.put("name", "MM-index1");
    		map.put("age", "17");
    		// 把map放入作用域，jsp用EL表达式取值
    		request.setAttribute("map", map);
    		// 返回page，路径为视图渲染配种中的
    		// name="prefix"+@RequestMapping("/upload")+@RequestMapping("/index1")+name="suffix"
    		// 当我们访问 http://localhost:8080/zpupload/upload/index1.html 他实际找的jsp文件为
    		// /WEB-INF/pages/upload/index1.jsp
    		return "index1";
    	}
    
    	@RequestMapping("index2")
    	public ModelAndView index2() {
    		ModelAndView modelAndView = new ModelAndView();
    		HashMap<String, Object> map = new HashMap<>();
    		map.put("name", "MM-index2-ModelAndView");
    		map.put("age", "18");
    		modelAndView.addObject("map", map);// request.setAttribute("map", map);
    		modelAndView.setViewName("upload/index2");// return "index1";
    		return modelAndView;
    	}
    
    	// 带参数的get访问
    	// http://localhost:8080/zpupload/upload/index3.html?username=你好
    	@RequestMapping("index3")
    	public String index3(HttpServletRequest request, HttpServletResponse response, HttpSession session) {
    		String username = request.getParameter("username");
    		System.out.println("username========>" + username);
    		HashMap<String, Object> map = new HashMap<>();
    		map.put("name", "MM-index3-Parameter");
    		map.put("age", "18");
    		request.setAttribute("map", map);
    		return "index3";
    	}
    
    	// 重定向：http://localhost:8080/zpupload/upload/index4.html?username=你好
    	@RequestMapping("index4")
    	public String index4(HttpServletRequest request) {
    		String username = request.getParameter("username");
    		System.out.println("username========>" + username);
    		HashMap<String, Object> map = new HashMap<>();
    		map.put("name", "MM-index4-redirect");
    		map.put("age", "18");
    		request.setAttribute("map", map);
    //		return "redirect:success.html?username=mm";
    //		return "redirect:/success.jsp";
    		return "forward:/success.jsp";
    		/**
    		 * return "redirect:/success.jsp";时
    		 * 会跳转 http://localhost:8080/zpupload/success.jsp
    		 * 访问WebContent下的success.jsp文件
    		 *  return "redirect:success.jsp";  --->  不加/
    		 * 是基于命名空间@RequestMapping("/upload")，会跳转/zpupload/upload/success.jsp
    		 * 重定向(不走视图解析，不会拼接路径)一定是webroot下面的页面或者是requestMapping路径,
    		 * WEB-INF下的文件不允许直接访问，需要借助中间跳转 
    		 * return "redirect:/success.html"; 时
    		 * 会跳转 http://localhost:8080/zpupload/upload/success.html
    		 * 被@RequestMapping("/success")拦截 访问return "common/success";
    		 * 访问 /WEB-INF/pages/common/success.jsp 文件
    		 * 
    		 * return "forward:/success.jsp";
    		 * 转发也会跳过视图解析，不拼接路径，访问WebContent下的success.jsp文件
    		 */
    
    	}
    
    	@RequestMapping("/success")
    	public String success() {
    		return "common/success";
    	}
    }

代码详见

http://download.csdn.net/detail/u013820054/9732369