SSM框架整合

Dao

整合mybatisspring

1.需要的jar包:mybatisjar包、Mysql数据库驱动、数据库连接池、Mybatisspring的整合包、Springjar

2.配置文件:

  • mybatis的配置文件:SqlMapConfig.xml


配置内容:

<?xmlversion="1.0" encoding="UTF-8" ?>
<!DOCTYPEconfiguration
PUBLIC"-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
 
</configuration>

  • Spring的配置文件:applicationContext-dao.xml


配置内容:

a、数据源

b、数据库连接池

c、配置SqlSessionFactorymybatisspring整合包中的)

d、配置mapper文件的扫描器。

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

	<!-- 数据库连接池 -->
	<!-- 加载配置文件 -->
	<context:property-placeholder location="classpath:properties/*.properties" />
	<!-- 数据库连接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		destroy-method="close">
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="maxActive" value="10" />
		<property name="minIdle" value="5" />
	</bean>
	<!-- 让spring管理sqlsessionfactory. 使用mybatis和spring整合包中的 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 数据库连接池 -->
		<property name="dataSource" ref="dataSource" />
		<!-- 加载mybatis的全局配置文件 -->
		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
	</bean>
	          <!--配置mapper文件的扫描器。-->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.taotao.mapper" />
	</bean>
</beans>


 

  • 数据库连接


配置内容:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/taotao?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root


 

Service 

  • 需要的jar包:springjar包。
  • 配置文件:applicationContext-service.xml

配置内容:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

	<!-- 包扫描器,扫描带@Service注解的类 -->
	<context:component-scan base-package="com.taotao.service"></context:component-scan>
</beans>


  • 置文件:applicationContext-trans.xml

配置内容:

1、配置一个事务管理器

2、配置tx

3、配置切面,切service

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	
	<!-- 事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 通知 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- 传播行为 -->
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="create*" 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>
	<!-- 切面 -->
	<aop:config>
		<aop:advisor advice-ref="txAdvice"
			pointcut="execution(* com.taotao.service.*.*(..))" />
	</aop:config>
</beans>

propagation="REQUIRED",如果当前方法运行的时候有事务开启,就在当前事务中执行,如果没有事务就开启一个新的事务,用于添加修改删除)

propagation="SUPPORTS"如果当前方法运行的时候有事务开启,就在当前事务中执行,如果没有事务不开启事务,用于查询

 

表现层

  • 需要的jar包:使用springmvc,需要使用springmvcspringjar包。
  • 配置文件:springmvc.xml

配置内容:

1、配置注解驱动

2、配置一个视图解析器。

3、包扫描器,@Controller注解

<?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.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.xsd">
   
    <!-- 配置包扫描器 -->   
    <context:component-scan base-package="com.taotao.controller"></context:component-scan>
    <!-- 配置注解驱动 -->
    <mvc:annotation-driven/>
    <!-- 视图解析器 -->
    <bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>     

  • 配置文件:Web.xml

配置内容:

1、配置springmvc的前端控制器

2Spring容器初始化的listener

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="taotao" version="2.5">
	<display-name>taotao-manager</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	
	<!-- 初始化spring容器 -->
	<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>

	<!-- 解决post乱码 -->
	<filter>
		<filter-name>CharacterEncodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>utf-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>CharacterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>


	<!-- springmvc的前端控制器 -->
	<servlet>
		<servlet-name>taotao-manager</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
		<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>taotao-manager</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
</web-app>



逆向工程

generatorSqlmapCustom导入到项目中,更改generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
  PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
  "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
	<context id="testTables" targetRuntime="MyBatis3">
		<commentGenerator>
			<!-- 是否去除自动生成的注释 true:是 : false:否 -->
			<property name="suppressAllComments" value="true" />
		</commentGenerator>
		<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
		<jdbcConnection driverClass="com.mysql.jdbc.Driver"
			connectionURL="jdbc:mysql://localhost:3306/taotao" userId="root"
			password="root">
		</jdbcConnection>
		<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和 
			NUMERIC 类型解析为java.math.BigDecimal -->
		<javaTypeResolver>
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>

		<!-- targetProject:生成PO类的位置 -->
		<javaModelGenerator targetPackage="com.taotao.pojo"
			targetProject=".\src">
			<!-- enableSubPackages:是否让schema作为包的后缀 -->
			<property name="enableSubPackages" value="false" />
			<!-- 从数据库返回的值被清理前后的空格 -->
			<property name="trimStrings" value="true" />
		</javaModelGenerator>
        <!-- targetProject:mapper映射文件生成的位置 -->
		<sqlMapGenerator targetPackage="com.taotao.mapper" 
			targetProject=".\src">
			<!-- enableSubPackages:是否让schema作为包的后缀 -->
			<property name="enableSubPackages" value="false" />
		</sqlMapGenerator>
		<!-- targetPackage:mapper接口生成的位置 -->
		<javaClientGenerator type="XMLMAPPER"
			targetPackage="com.taotao.mapper" 
			targetProject=".\src">
			<!-- enableSubPackages:是否让schema作为包的后缀 -->
			<property name="enableSubPackages" value="false" />
		</javaClientGenerator>
		<!-- 指定数据库表 -->
		<table schema="" tableName="tb_content" />
		<table schema="" tableName="tb_content_category" />
		<table schema="" tableName="tb_item" />
		<table schema="" tableName="tb_item_cat" />
		<table schema="" tableName="tb_item_desc" />
		<table schema="" tableName="tb_item_param" />
		<table schema="" tableName="tb_item_param_item" />
		<table schema="" tableName="tb_order" />
		<table schema="" tableName="tb_order_item" />
		<table schema="" tableName="tb_order_shipping" />
		<table schema="" tableName="tb_user" />
	</context>
</generatorConfiguration>

然后运行GeneratorSqlmap,就会生成两个包com.taotao.mappercom.taotao.pojo,把这两个生成的包分别放入daopojo

 

测试整合框架

需求:根据商品id查询商品信息,返回json数据。


Dao层:查询的表tb_item,根据商品id查询。可以使用逆向工程生成的代码。


Service层:接收商品id,调用mapper查询商品信息。返回商品的pojo

参数:Long itemId

返回值:TbItem

@Service
public class ItemServiceImpl implements ItemService {
 
	@Autowired
	private TbItemMapper itemMapper;
	@Override
	public TbItem getItemById(Long itemId) {
		//TbItem item = itemMapper.selectByPrimaryKey(itemId);
		TbItemExample example = new TbItemExample();
		//创建查询条件
		Criteria criteria = example.createCriteria();
		criteria.andIdEqualTo(itemId);
		List<TbItem> list = itemMapper.selectByExample(example);
		//判断list中是否为空
		TbItem item = null;
		if (list != null && list.size() > 0) {
			item = list.get(0);
		}
		return item;
	}
 
}


Controller层:接收商品id,调用Service返回一个商品的pojo,直接响应pojo。需要返回json数据,使用@ResponseBody

注意:使用@ResponseBody时候一定要把Jackson包添加到工程中。

Url/item/{itemId}

响应:TbItem

@Controller
public class ItemController {
 
	@Autowired
	private ItemService itemService;
	@RequestMapping("/item/{itemId}")
	@ResponseBody
	private TbItem getItemById(@PathVariable Long itemId) {
		TbItem item = itemService.getItemById(itemId);
		return item;
	}
}


解决mapper映射文件不拷贝的问题:需要修改taotao-manager-dao工程的pom文件。添加如下内容:

!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
	<build>
		<resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
	</build>


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