SpringMVC框架一：搭建测试

这里做一个Demo：展示商品列表

新建Dynamic Web Project：

导入jar包，放在lib下：

 

放入Lib文件夹之后，会自动build path

接下来配置web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>springMVC</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>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
</web-app>

简单写一个商品列表的jsp页面：itemList.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询商品列表</title>
</head>
<body> 
<form action="${pageContext.request.contextPath }/item/queryitem.action" method="post">
查询条件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
    <td>商品名称</td>
    <td>商品价格</td>
    <td>生产日期</td>
    <td>商品描述</td>
    <td>操作</td>
</tr>
<c:forEach items="${itemList }" var="item">
<tr>
    <td>${item.name }</td>
    <td>${item.price }</td>
    <td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>
    <td>${item.detail }</td>
    
    <td><a href="${pageContext.request.contextPath }/itemEdit.action?id=${item.id}">修改</a></td>

</tr>
</c:forEach>

</table>
</form>
</body>

</html>

 商品Items的POJO类：

package org.dreamtech.springmvc.pojo;

import java.util.Date;

public class Items {

    public Items(Integer id, String name, Float price, Date createtime, String detail) {
        super();
        this.id = id;
        this.name = name;
        this.price = price;
        this.createtime = createtime;
        this.detail = detail;
    }

    private Integer id;

    private String name;

    private Float price;

    private String pic;

    private Date createtime;

    private String detail;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name == null ? null : name.trim();
    }

    public Float getPrice() {
        return price;
    }

    public void setPrice(Float price) {
        this.price = price;
    }

    public String getPic() {
        return pic;
    }

    public void setPic(String pic) {
        this.pic = pic == null ? null : pic.trim();
    }

    public Date getCreatetime() {
        return createtime;
    }

    public void setCreatetime(Date createtime) {
        this.createtime = createtime;
    }

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail == null ? null : detail.trim();
    }
}
View Code

springmvc配置文件：SpringMVC.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: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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 扫描@Controler @Service -->
    <context:component-scan base-package="org.dreamtech" />


</beans>

ItemController:

package org.dreamtech.springmvc.controller;

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

import org.dreamtech.springmvc.pojo.Items;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class ItemController {

    @RequestMapping(value = "/item/itemlist.action")
    public ModelAndView itemList() {

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

        ModelAndView mav = new ModelAndView();
        mav.addObject("itemList", list);
        mav.setViewName("/WEB-INF/jsp/itemList.jsp");
        return mav;
    }
}

这里返回的是ModelAndView：这种是最全的返回类型

另外可以返回：String，直接返回视图名即可，如果要传参，带个Model，model.addAttribute()即可

这种方式推荐使用：

重定向：返回"redirect:/xx/xxx"：用于修改完信息后

转发：返回"forward:/xx/xxx"

最后一种返回voic：适用于无返回视图的情况：JSON，如果强行返回或者传参，需要servlet原生方法

启动Tomcat：

访问：http://localhost:8080/springMVC/item/itemlist.action

看到页面和数据：

到这里，第一个小案例就完成了

后边会仔细介绍SpringMVC

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原文地址：https://www.cnblogs.com/xuyiqing/p/9417353.html