3.ssm整合(传智播客)

需求:查询商品列表

一.配置

1.web.xml

<!-- 启动Web容器时,加载spring容器,自动装配ApplicationContext.xml的配置信息 -->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:spring/applicationContext-*.xml</param-value>
</context-param>
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <!-- 加载springmvc配置文件 -->
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring/springmvc.xml</param-value>
  </init-param>
</servlet>
<!-- 配置将所有请求交给springmvc来处理 -->
<servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

2.springmvc.xml

 <!-- 1.配置处理器,可以扫描controller、service、... 这里让扫描controller,指定controller的包 -->
<context:component-scan base-package="com.steven.ssm.controller"></context:component-scan>

<!-- 2.配置处理器映射起和处理器适配器 -->
<!-- 使用mvc:annotation-driven配置注解映射器和注解适配器,其默认加载很多的参数绑定方法,比如json转换解析器等等 -->
<mvc:annotation-driven></mvc:annotation-driven>

<!-- 3.配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
   <!-- 配置jsp路径的前缀 -->
   <property name="prefix" value="/WEB-INF/views/"/>
   <!-- 配置jsp路径的后缀 -->
   <property name="suffix" value=".jsp"/>
</bean>

3.applicationContext-dao.xml

<!-- 加载db.properties -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 1.配置数据源(c3p0数据库连接池) -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <!-- 基础配置 -->
    <property name="jdbcUrl" value="${jdbc.url}"/>
    <property name="driverClass" value="${jdbc.driver}"/>
    <property name="user" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
</bean>

<!-- 2.配置sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <!-- 加载数据源 -->
    <property name="dataSource" ref="dataSource" />
    <!-- 加载mybatis的全局配置文件 -->
    <property name="configLocation" value="classpath:mybatis/mybatis.xml" />
    <!--设置映射文件位置-->
    <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
</bean>

<!-- 3.配置mapper扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 扫描包路径(如果需要扫描多个包，中间使用半角逗号隔开) -->
    <property name="basePackage" value="com.steven.ssm.mapper"/>
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>

4.applicationContext-service.xml

<bean id="itemsService" class="com.steven.ssm.service.impl.ItemsServiceImpl"/>

二.开发步骤

1.处理器（控制器）的开发

@Controller
@RequestMapping("/items")
public class ItemsController {
    private static final Logger log = Logger.getLogger(Logger.class);

    @Autowired
    private ItemsServiceImpl itemsService;
    //商品查询列表
    @RequestMapping("/queryItems")
    public ModelAndView queryItems() throws Exception{
        List<Items> itemsList = itemsService.getItemsList();
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("itemsList",itemsList);
        modelAndView.setViewName("items/queryItems");
        log.info("itemList:"+itemsList);
        return modelAndView;
    }
}

2.service开发

public interface ItemsService {
    //查询商品列表
    List<Items> getItemsList() throws Exception;
}

@Service
public class ItemsServiceImpl implements ItemsService {
    @Autowired
    private ItemsMapperCustom itemsMapperCustom;

    @Override
    public List<Items> getItemsList() throws Exception {
        return itemsMapperCustom.getItemsList();
    }
}

3.dao开发

public interface ItemsMapperCustom {
    //查询商品列表
    List<Items> getItemsList()throws Exception;
}

<!--查询商品列表-->
<select id="getItemsList" resultMap="queryItems">
    SELECT * FROM item
</select>
<resultMap id="queryItems" type="Items">
    <id column="item_id" property="itemId"/>
    <result column="item_id" property="itemId"/>
    <result column="item_name" property="itemName"/>
    <result column="item_price" property="itemPrice"/>
    <result column="item_detail" property="itemDetail"/>
    <result column="item_createDate" property="itemCreateDate"/>
</resultMap>

4.视图的开发

<%@ 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="" method="post">
		    商品列表：
		    <table width="100%" border=1>
		        <tr>
		            <td>商品编号</td>
		            <td>商品名称</td>
		            <td>商品价格</td>
		            <td>商品描述</td>
		        </tr>
		        <c:forEach items="${itemsList }" var="item">
		            <tr>
		                <td>${item.id}</td>
		                <td>${item.name}</td>
		                <td>${item.price }</td>
		                <td>${item.detail }</td>
		            </tr>
		        </c:forEach>
		    </table>
		</form>
	</body>
</html>