SpringMVC之入门程序

SpringMVC之入门程序——使用浏览器展示商品数据

springMVC执行流程(图片来源:https://www.jianshu.com/p/8a20c547e245)

1.创建pojo（商品实体类）...

2.导包

3.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-01</display-name>
  <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>

  <!-- 前端控制器 -->
  <servlet>
          <servlet-name>springmvc</servlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
          <!-- 默认找/WEB-INF/[servlet的名称（name）]-servlet.xml -->
          <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:springmvc.xml</param-value>
          </init-param>
  </servlet>

  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <!--
          1. /* 拦截所有 jsp js png .css.... 真的全部拦截   建议不使用
          2. *.action   *.do 拦截以 do  action 结尾的请求  肯定能使用
          3. / 拦截所有(不包含jsp)(包含.js,.png,.css...) 强烈建议使用  /对静态资源放行
        -->
        <url-pattern>*.action</url-pattern>
  </servlet-mapping>
</web-app>

4.配置springmvc.xml核心配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="http://www.springframework.org/schema/beans"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-4.2.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-4.2.xsd ">

     <!-- 扫描@Controller、@Service -->
     <context:component-scan base-package="deep"></context:component-scan>

</beans>

5.创建Controller层

package deep.springmvc.controller;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

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

import deep.springmvc.pojo.Items;

/**
 * 商品管理
 * @author DeepSleeping
 *
 */
@Controller
public class ItemController {

    //入门程序(使用浏览器展示商品列表)
    @RequestMapping(value = "/item/itemlist.action")
    public ModelAndView itemList(){

        //创建页面需要显示的商品数据
        List<Items> list = new ArrayList<Items>();
        list.add(new Items(1, "1华为荣耀8", 2399f, new Date(), "质量好！ 1"));
        list.add(new Items(2, "2华为荣耀8", 2399f, new Date(), "质量好！ 2"));
        list.add(new Items(3, "3华为荣耀8", 2399f, new Date(), "质量好！ 3"));
        list.add(new Items(4, "4华为荣耀8", 2399f, new Date(), "质量好！ 4"));
        list.add(new Items(5, "5华为荣耀8", 2399f, new Date(), "质量好！ 5"));
        list.add(new Items(6, "6华为荣耀8", 2399f, new Date(), "质量好！ 6"));

        ModelAndView mav = new ModelAndView();
        //数据
        mav.addObject("itemList", list);

        mav.setViewName("/WEB-INF/jsp/itemList.jsp");
        return mav;
    }
}

6.导入jsp页面，获取数据