需求:查詢商品列表

一.配置

1.web.xml

<!-- 啟動Web容器時,載入spring容器,自動裝配ApplicationContext.xml的配置資訊 -->
<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>
  <!-- 載入springmvc配置檔案 -->
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring/springmvc.xml</param-value>
  </init-param>
</servlet>
<!-- 配置將所有請求交給springmvc來處理 -->
<servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>
 

2.springmvc.xml

 <!-- 1.配置處理器,可以掃描controller、service、... 這裡讓掃描controller,指定controller的包 -->
<context:component-scan base-package="com.steven.ssm.controller"></context:component-scan>

<!-- 2.配置處理器對映起和處理器介面卡 -->
<!-- 使用mvc:annotation-driven配置註解對映器和註解介面卡,其預設載入很多的引數繫結方法,比如json轉換解析器等等 -->
<mvc:annotation-driven></mvc:annotation-driven>

<!-- 3.配置檢視解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
   <!-- 配置jsp路徑的字首 -->
   <property name="prefix" value="/WEB-INF/views/"/>
   <!-- 配置jsp路徑的字尾 -->
   <property name="suffix" value=".jsp"/>
</bean>
 

3.applicationContext-dao.xml

<!-- 載入db.properties -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 1.配置資料來源(c3p0資料庫連線池) -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <!-- 基礎配置 -->
    <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">
    <!-- 載入資料來源 -->
    <property name="dataSource" ref="dataSource" />
    <!-- 載入mybatis的全域性配置檔案 -->
    <property name="configLocation" value="classpath:mybatis/mybatis.xml" />
    <!--設定對映檔案位置-->
    <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
</bean>

<!-- 3.配置mapper掃描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 掃描包路徑(如果需要掃描多個包，中間使用半形逗號隔開) -->
    <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.開發步驟

1.處理器（控制器）的開發

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

    @Autowired
    private ItemsServiceImpl itemsService;
    //商品查詢列表
    @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開發

public interface ItemsService {
    //查詢商品列表
    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開發

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

<!--查詢商品列表-->
<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.檢視的開發

<%@ 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>查詢商品列表</title>
	</head>
	<body>
		<form action="" method="post">
		    商品列表：
		    <table width="100%" border=1>
		        <tr>
		            <td>商品編號</td>
		            <td>商品名稱</td>
		            <td>商品價格</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>