springmvc学习笔记1

话不多说，代码吧。

首先，需要导入的jar包有(当然根据实际需要还要添加其他的一些jar包)：见附件。其实这些jar包也没什么，主要就是spring的那些beans，core，expression，context，web，webmvc以及加上commons-logging的日志记录包即可

配置web.xml文件，如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	
	
   <!-- 编码集的过滤器(只对post请求起作用) -->
	<filter>
		<filter-name>CharacterEncodingFilter</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>
		<init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>
	</filter>
	<filter-mapping>
		<filter-name>CharacterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<!-- 在页面需要引入js，css或者图片等时，需进行如下配置 -->
	<servlet-mapping>  
        <servlet-name>default</servlet-name>  
        <url-pattern>*.css</url-pattern>  
    </servlet-mapping>  
  
    <servlet-mapping>  
        <servlet-name>default</servlet-name>  
        <url-pattern>*.gif</url-pattern>  
    </servlet-mapping>  
  
    <servlet-mapping>  
        <servlet-name>default</servlet-name>  
        <url-pattern>*.jpg</url-pattern>  
    </servlet-mapping>  
  
    <servlet-mapping>  
        <servlet-name>default</servlet-name>  
        <url-pattern>*.js</url-pattern>  
    </servlet-mapping>  
	
  <display-name>test2</display-name>
  
  <!-- 配置DispatcherServlet的映射，并在tomcat启动时启动 -->
  <servlet>
  	<servlet-name>SpringMVC</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>SpringMVC</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
  
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 配置[servlet-name的名称]-servlet.xml文件，配置如下：

<?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:p="http://www.springframework.org/schema/p"    
    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-3.0.xsd     
           http://www.springframework.org/schema/context     
           http://www.springframework.org/schema/context/spring-context-3.0.xsd    
           http://www.springframework.org/schema/mvc     
           http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
            
                <!-- 打开springmvc控制层(controller)对注解的支持（cn.bdx.controller表示是哪个包对注解的支持） -->
	<context:component-scan base-package="cn.bdx.controller"></context:component-scan>
	
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
</beans>

 其中[servlet-name的名称]即为web.xml文件中配置的DispatcherServlet类对应的servlet-name的值，在这里为"SpringMVC"。上面的web.xml文件的配置之后这个SpringMVC-servlet.xml文件必须配置在WEB-INF目录下面，如果需要更改这个配置文件(SpringMVC-servlet.xml)的位置，则需要在web.xml文件修改DispatcherServlet类映射的内容，修改后的内容如下：

<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:*-servlet.xml</param-value>
  	</init-param>
  </servlet>
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>

 这样SpringMVC-servlet.xml文件就可以配置在src目录下面了。

控制层controller层：

package cn.bdx.controller;

import java.util.List;

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

import cn.bdx.exception.ServiceException;
import cn.bdx.model.User;
import cn.bdx.service.impl.UserServiceImpl;
import cn.bdx.service.intf.UserService;

@Controller//该注解说明该类为springmvc的控制类
@RequestMapping("/user")//该类的访问路径
public class UserController {

	@RequestMapping("/add")//该方法的访问路径
	public ModelAndView add(User user,ModelMap model) {
		UserService userService = new UserServiceImpl();
		boolean flag = false;
		try {
			flag = userService.add(user);
		} catch (ServiceException e) {
			e.printStackTrace();
		}
		model.put("flag", flag);
		return new ModelAndView("addUser",model);//返回类型,addUser表示的将返回到哪个页面，model为将传递到该页面的参数
	}
	
	@RequestMapping("/query")
	public ModelAndView query(ModelMap model) {
		UserService userService = new UserServiceImpl();
		try {
			List<User> userList = userService.query();
			model.put("userList", userList);
		} catch (ServiceException e) {
			e.printStackTrace();
		}
		return new ModelAndView("queryUser", model);
	}
	
}

 项目目录：见附件

 

启动tomcat，访问：http://localhost:8080/springmvc_test2/user/add