SpringMVC框架(1)之(1.2 入门程序—SpringMVC与Mybatis整合)

一、整合思路:

1. jar包:

mybatis包、spring包、mybatis和spring整合包、数据库驱动包、日志包;

2. Spring管理:

SpringMVC中编写的 Handler(即Controller)、Mybatis的 SqlSessionFactory、mapper;

3. 工程结构:

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

4. 配置文件:

1. applicationContext-dao.xml —配置数据源、SqlSessionFactory、mapper
2. applicationContext-service.xml —配置 service接口
3. applicationContext-transaction.xml —配置事务管理
4. springmvc.xml —配置映射器、适配器、视图解析器
5. SqlMapConfig.xml(mybatis的配置文件) —别名、setting、(mapper)
6. web.xml —配置 DispatcherServlet前端控制器

5. 编写:

dao(即mapper)、service、controller、jsp:
商品列表开发:查询商品、根据条件查询
【 5.1 mapper 】: 一般情况下,针对查询 mapper需要自定义 mapper
(eg:下方 5.1 中mapper文件:selct * from items where name like‘’ and price)
【 5.2 service】:service可以调用spring容器中的dao(即mapper); 再在对应的 service.xml文件中进行配置;
(eg:下方 5.2 中定义 service文件,service接口中方法可以与 mapper接口中方法一致; service接口的实现类中有 mapper属性,由 spring容器生成(applicationContext-dao.xml中的 mapper扫描器生成)mapper对象,再使用@Autowired注解注入进来; spring容器中生成 service对象要在 applicationContext-service.xml中配置才能生成;)
【 5.3 controller】:类上使用 @Controller注解、类的方法上使用 @RequestMapping注解映射其 url、类中使用@Autowired注解注入 itemsService;
【 5.4 jsp】:jsp页面中显示出 controller类中 modelAndView中的 itemsList;

(项目中这些配置文件可一起也可放在对应分类的文件夹中:)
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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
(配置配置数据源、SqlSessionFactory、mapper(即 mapper接口mapper的.java 文件))

<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. 配置数据源 -->
       <!-- 加载属性文件 -->
       <context:property-placeholder location="classpath:db.properties"/>
       <!-- 数据库连接池 -->
       <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">
        <!-- 配置数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 加载mybatis的配置文件 -->
        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property>
    </bean>
    
    <!-- 3. Mapper扫描器 -->
    <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

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<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.事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    	<property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 2.事务通知 (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,拦截什么方法(切入点表达式)+增强 -->
    <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"> 
	
	<!-- (开启spring注解扫描)3.注解开发的Handler -->
	<context:component-scan base-package="com.asd"></context:component-scan>

	<!-- 1.注解映射器 -->  
	<bean name="" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingInfoHandlerMapping">
	</bean>

	<!-- 2.注解适配器 --> 
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>

	<!-- 4.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>

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.加载启动Spring框架 -->
         <context-param> // 加载spring容器
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext-*.xml</param-value>
         </context-param>
         <listener> // 加载监听
             <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
         </listener>

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

【 5.1 开发mapper即 dao层:】
5.1.1 ItemsCustomMapper.xml(mapper映射文件)
(mpper的 namespace是 对应mapper接口的全限定名; < sql >片段中从 parameterType输入类型 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">
    <!-- 商品查询的sql片段,建议:以单表为单位 -->
    <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>
    <!-- 根据条件查找 -->
    <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接口)

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

5.1.2 ItemsCustom.java

// Items扩展类
public class ItemsCustom extends Items{
}

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

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

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

【 5.2 开发 service:】

5.2.1 ItemsService.java
(接口,与 mapper接口中方法可保持一致;)

// 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的实现类; 再在 applicationContext-service.xml中进行配置。)

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 开发 controller:】

5.3.1 ItemsController.java
(Controller上有 @Controller注解;类中的方法上使用 @RequestMapping注解映射其 url; 方法中要调用 service查询出商品,要使用到 itemsService,使用@Autowired注解注入 itemsService;)

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

	@RequestMapping("/queryItems")
	public ModelAndView queryItems() throws Exception{
		//调用service查询出的商品,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 开发 jsp:】

5.4.1 items.jsp
(< c:foreach>显示要用到 jstl标签,所以文本头要添加一行:)

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<body>
	<table width="100%" border="1">
		<tr><td>商品名称</td><td>商品价格</td><td>商品详情</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>

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转载自blog.csdn.net/qq_41029923/article/details/84587924