1. 程式人生 > >SpringMVC框架(1)之(1.2 入門程式—SpringMVC與Mybatis整合)

SpringMVC框架(1)之(1.2 入門程式—SpringMVC與Mybatis整合)

一、整合思路:

1. jar包:

mybatis包、spring包、mybatis和spring整合包、資料庫驅動包、日誌包;

2. Spring管理:

SpringMVC中編寫的 Handler(即Controller)、Mybatis的 SqlSessionFactory、mapper;

3. 工程結構:

第一步:整合 dao、spring、mybatis;
第二步:整合 service;
第三部:整合 controller

4. 配置檔案:

1. applicationContext-dao.xml —配置資料來源、SqlSessionFactory、mapper
2. applicationContext-service.xml

—配置 service介面
3. applicationContext-transaction.xml —配置事務管理
4. springmvc.xml —配置對映器、介面卡、檢視解析器
5. SqlMapConfig.xml(mybatis的配置檔案) —別名、setting、(mapper)
6. web.xml —配置 DispatcherServlet前端控制器

5. 編寫:

dao(即mapper)、service、controller、jsp:
商品列表開發:查詢商品、根據條件查詢
【 5.1 mapper 】: 一般情況下,針對查詢 mapper需要自定義 mapper
(eg:下方 5.1 中mapper檔案:selct * from items where name like‘’ and price)
【 5.2 service】:

service可以呼叫spring容器中的dao(即mapper); 再在對應的 service.xml檔案中進行配置;
(eg:下方 5.2 中定義 service檔案,service介面中方法可以與 mapper介面中方法一致; service介面的實現類中有 mapper屬性,由 spring容器生成(applicationContext-dao.xml中的 mapper掃描器生成)mapper物件,再使用@Autowired註解注入進來; spring容器中生成 service物件要在 applicationContext-service.xml中配置才能生成;)
【 5.3 controller】:
類上使用 @Controller註解、類的方法上使用 @RequestMapping註解對映其 url、類中使用@Autowired註解注入 itemsService;

【 5.4 jsp】:jsp頁面中顯示出 controller類中 modelAndView中的 itemsList;

 

 

(專案中這些配置檔案可一起也可放在對應分類的資料夾中:)
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4.0. db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=mysql:jdbc://localhost:3306/test
jdbc.username=root
jdbc.password=12345

4.1. applicationContext-dao.xml
(配置配置資料來源、SqlSessionFactory、mapper(即 mapper介面mapper的.java 檔案))

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 1. 配置資料來源 -->
       <!-- 載入屬性檔案 -->
       <context:property-placeholder location="classpath:db.properties"/>
       <!-- 資料庫連線池 -->
       <bean id="dataSource" class="com.mchange.v2.com.mchange.v2.c3p0.ComboPooledDataSource">
    	<property name="driverClass" value="${jdbc.driver}"></property>
    	<property name="jdbcUrl" value="${jdbc.url}"></property>
    	<property name="user" value="${jdbc.username}"></property>
    	<property name="password" value="${jdbc.password}"></property>
    	<property name="maxActive" value="10"></property>
    	<property name="maxIdle" value="5"></property>
    </bean>

    <!-- 2. SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 配置資料來源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 載入mybatis的配置檔案 -->
        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property>
    </bean>
    
    <!-- 3. Mapper掃描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.asd.mapper"/>
    </bean>   
</beans>

4.2. applicationContext-service.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 商品管理的service -->
    <bean id="itemsService" class="com.asd.service.ItemsServiceImpl"></bean>
    
</beans>

4.3. applicationContext-transaction.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 1.事務管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    	<property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 2.事務通知 (即如何管理) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
    	<tx:attributes>
    		<tx:method name="save" propagation="REQUIRED"/>
    		<tx:method name="insert" propagation="REQUIRED"/>
    		<tx:method name="delete" propagation="REQUIRED"/>
    		<tx:method name="update" propagation="REQUIRED"/>
    		<tx:method name="find" propagation="SUPPORTS" read-only="true"/>
    		<tx:method name="select" propagation="SUPPORTS" read-only="true"/>
    		<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
    	</tx:attributes>
    </tx:advice>
    <!-- 3.AOP,攔截什麼方法(切入點表示式)+增強 -->
    <aop:config>
    	<aop:pointcut id="pt" expression="execution(* com.asd.ssm.service.*.*(..))"/>
    	<aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
    
</beans>

4.4. springmvc.xml

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> 
	
	<!-- (開啟spring註解掃描)3.註解開發的Handler -->
	<context:component-scan base-package="com.asd"></context:component-scan>

	<!-- 1.註解對映器 -->  
	<bean name="" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingInfoHandlerMapping">
	</bean>

	<!-- 2.註解介面卡 --> 
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>

	<!-- 4.檢視解析器 --> 
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
</beans>

4.5. SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
       
<configuration>
    <typeAliase> 
        <package name="com.iotek.po"/>
    </typeAliase>
</configuration>

4.6. web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
		  http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"
         version="3.0">
         
         <!-- 1.配置DiapatcherServlet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:spring/springmvc.xml</param-value>
	        </init-param>
	        <load-on-startup>1</load-on-startup> 
         </servlet>
         <servlet-mapping>
         	<servlet-name>springmvc</servlet-name>
         	<url-pattern>*.action</url-pattern> 
         </servlet-mapping>
         
         <!-- 2.載入啟動Spring框架 -->
         <context-param> // 載入spring容器
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext-*.xml</param-value>
         </context-param>
         <listener> // 載入監聽
             <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
         </listener>

         <welcome-file-list>         	
         </welcome-file-list>
</web-app>

 

 

【 5.1 開發mapper即 dao層:】
5.1.1 ItemsCustomMapper.xml(mapper對映檔案)
(mpper的 namespace是 對應mapper介面的全限定名; < sql >片段中從 parameterType輸入型別 itemsQueryVo中拿 itemsCustom,)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
           
<mapper namespace="com.asd.mapper.ItemsCustomMapper">
    <!-- 商品查詢的sql片段,建議:以單表為單位 -->
    <sql id="query_items_where">
    	<if test="itemsCustom!=null">
    		<if test="itemsCustom.name!=null and itemsCustom.name!=''">
    			and name like '%${itemsCustom.name}%'
    		</if>
    		<if test="itemsCustom.id!=null">
    			and id=#{itemsCustom.id}
    		</if>
    	</if>
    </sql>
    <!-- 根據條件查詢 -->
    <select id="findItemsList" parameterType="itemsQueryVo"  resultType="itemsCustom">
        select * from items 
        <where>
        	<include refid="query_items_where"/>
        </where>
    </select> 
    
</mapper>

5.1.1’ ItemsCustomMapper.java(mapper介面)

public interface ItemsCustomMapper{
	public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception;
}

5.1.2 ItemsCustom.java

// Items擴充套件類
public class ItemsCustom extends Items{
}

5.1.3 com.asd.po包中有:Items.java、ItemsQueryVo.java
ItemsQueryVo.java

// 商品的包裝類
public class ItemsQueryVo{
	private ItemsCustom itemsCustom;
	set、get();
}

5.1.4 com.asd.mapper包中有:ItemsMapper.xml、ItemsMapper.java

 

【 5.2 開發 service:】

5.2.1 ItemsService.java
(介面,與 mapper介面中方法可保持一致;)

// 商品列表的service
public interface ItemsService{
	public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception;
}

5.2.1’ ItemsServiceImpl.java
(商品列表的service的實現類; 再在 applicationContext-service.xml中進行配置。)

public class ItemsServiceImpl implements ItemsService{
	@Autowired //注入mapper
	private ItemsCustomMapper itemsCustomMapper;

	public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception{
		return itemsCustomMapper.findItemsList(itemsQueryVo);
	}
}

 

【 5.3 開發 controller:】

5.3.1 ItemsController.java
(Controller上有 @Controller註解;類中的方法上使用 @RequestMapping註解對映其 url; 方法中要呼叫 service查詢出商品,要使用到 itemsService,使用@Autowired註解注入 itemsService;)

@Controller
public class ItemsController{
	@Autowired
	private ItemsService itemsService;

	@RequestMapping("/queryItems")
	public ModelAndView queryItems() throws Exception{
		//呼叫service查詢出的商品,要用到itemsService
		List<ItemsCustom> itemList=itemsService.findItemsList(null);
		ModelAndView modelAndView=new ModelAndView();
		modelAndView.addObject("items",itemsList);
		modelAndView.setViewName("itemsList");
		return modelAndView;
	}
}

 

【 5.4 開發 jsp:】

5.4.1 items.jsp
(< c:foreach>顯示要用到 jstl標籤,所以文字頭要新增一行:)

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<body>
	<table width="100%" border="1">
		<tr><td>商品名稱</td><td>商品價格</td><td>商品詳情</td></tr>
		<c:foreach items="${items}" var="item">
			<tr><td>${item.name}</td><td>${item.price}</td><td>${item.detail}</td></tr>
		</c:foreach>
	</table>
</body>