SpringMVC入门笔记一

SpringMVC优势
    性能比struts2好
    简单 便捷 易学
    和Spring无缝集成(使用spring ioc aop)
    约定优于配置
    能够简单进行Junit测试
    支持Restful风格
    本地化、国际化、数据验证、类型转换
    拦截器
    
   
1、导入包
 

2、配置springMVC

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    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_3_0.xsd">
  <display-name></display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

   <!--1.配置springMVC前端控制器(是总的控制中心  被拦截的url会汇聚到该servlet) -->
    <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-servlet.xml</param-value>
      </init-param>
        <load-on-startup>1</load-on-startup>  <!-- tomcat启动后立即加载 -->
   </servlet>  

      <!--配置Spring -->
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springmvc-servlet.xml</param-value>
      </context-param>

    <!--2. 配置spring拦截的url模板  以.do结尾的url-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>  

    <!--3. 注册配置文件读取器，监听spring配置文件的变化 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>   

  <!-- 指定spring配置文件位置 -->
  <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:springmvc-servlet.xml</param-value>
  </context-param>

    <!--5. 编码字符集统一为UTF-8（过滤器） -->
    <filter>
        <display-name>encodingFilter</display-name>
        <filter-name>encodingFilter</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>  

</web-app>

完整web.xml

springmvc-servlet.xml

package wym.controler;

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 FirstSpringMvc implements Controller
{

    @Override
    public ModelAndView handleRequest(HttpServletRequest arg0,
            HttpServletResponse arg1) throws Exception {
        // TODO Auto-generated method stub

        ModelAndView mv=new ModelAndView();

        mv.addObject("msg","你好。。 springmvc");///WEB-INF/jsp/hello.jsp
        mv.setViewName("hellow");
        return mv;
    }

}

FirstSpringMvc.java