springmvc入门实例

时间 2020-08-10 标签 springmvc 入门实例

代码执行流程：

浏览器中访问路径为http://localhost:8080/itemList/itemList.actionhtml

.action被web.xml中配置的*.action拦截java

*.action这个url-pattern对应servlet-name为springmvcweb

springmvc对应的servlet-class中配置了springmvc.xml这个配置文件spring

在springmvc.xml配置文件中配置了controller包json

包中的controller类加了@Controller注解，因此会扫描这个类浏览器

类中的hello方法配置的@RequestMapping为itemList,与地址栏访问的一致 spring-mvc

代码

jar:架构

pojo: mvc

public class Item {

	/** 商品id */
	private Integer id;
	/** 商品名称 */
	private String name;
	/** 商品建立时间 */
	private Date createtime;
	/** 商品价格 */
	private Double price;
	/** 商品描述 */
	private String detail;
	
	public Item() {
	}

	public Item(Integer id, String name, Date createtime, String detail) {
		this.id = id;
		this.name = name;
		this.createtime = createtime;
		this.detail = detail;
	}

	
	public Double getPrice() {
		return price;
	}

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

	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;
	}

	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;
	}
}

jsp:app

<%@ 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="${pageContext.request.contextPath }/queryItem.action" method="post">
查询条件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
	<td>商品名称</td>
	<td>商品价格</td>
	<td>生产日期</td>
	<td>商品描述</td>
	<td>操做</td>
</tr>
<c:forEach items="${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>

controller:

@Controller
public class ItemControll {

	@RequestMapping("itemList")
	public ModelAndView hello(){
	
		ModelAndView modelAndView = new ModelAndView();
		
		List<Item> list = Arrays.asList(new Item(1, "海尔", new Date(), "海尔制冷冰箱"),
										new Item(1, "格力", new Date(), "格力变频空调"),
										new Item(1, "美的", new Date(), "美的洗衣机"),
										new Item(1, "老板", new Date(), "老板吸油烟机"));
		modelAndView.addObject("itemList", list);
		//modelAndView.setViewName("/WEB-INF/jsp/itemList.jsp");
		//springmvc.xml中配置视图解析器后这里就不须要前缀和后缀
		modelAndView.setViewName("itemList");
		
		return modelAndView;
	}
	
}

springmvc.xml配置文件

<?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">

        <!-- 配置controller的扫描包 -->
        <context:component-scan base-package="controller"/>
        
        <!-- 配置处理器映射器 -->
        <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
        
        <!-- 配置处理器适配器 -->
        <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
        
        <!-- 配置注解驱动，至关于同时使用最新处理器映射器和处理器适配器,对json数据的响应提供支持-->
		<mvc:annotation-driven/>
		
		<!-- 配置视图解析器 -->
		<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
			<property name="prefix" value="/WEB-INF/jsp/"></property>
			<property name="suffix" value=".jsp"></property>
		</bean>
</beans>

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">
  <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>

springmvc入门实例

代码执行流程：

代码

springmvc架构