1.导入相关的jar包
druid
mybatis
mybatis-spring
pageHelper
mysql驱动包
spring-context-support
spring-aspect
spring-jdbc 事务切面
spring-tx 事务建议
spring-web
servlet-api
jsp-api
jstl
standard
lombok
log4j
2.相关的配置文件
jdbc.propertites
applicationContext.xml
*mapper.xml
log4j.properties
3.记住一些核心类
DruidDataSource 德鲁伊的核心类
SqlSessionFactoryBean mybatis-spring变为mybatis-config.xml
DataSourceTransactionManager 事务切面
做建议 read-only
4.步骤
1.先导入jar包
2.编写核心配置文件
2.1 数据源处理
2.2 SqlSessionFactoryBean
2.3 SqlSessionTemplate
2.4 切面 DataSourceTransactionManager
2.5 AOP 关注点 execution(* com.blb.service..*(..)) 关注的都是业务层，要么都执行，要么都不执行
2.6 为当前事务设置一些建议，哪些方法要事务，哪些方法不要事务
增删改 一定要事务
查询 可加可不加
2.7 构建项目
分层设计 遵循三层的设计原则 BeanUtils用于进行多层实体类之间的数据转换
控制层 controller/action vo
业务层 biz/service bo
持久层 dao/repository
实体类 domain/pojo/dto/model/bean
3.具体实现
3.1 编写映射文件 SQL语句 mybatis讲究的是代码和SQL分离
3.2 在DAO中注入sqlSession
3.3 编写持久层代码
3.4 编写业务层代码
3.5 编写控制层代码
4.和我们的web项目做一个整合
我们必须引入spring-web的jar包 主要的用途是用来当前项目初始化就加载配置文件并生成IOC容器的
1 <?xml version="1.0" encoding="UTF-8"?>
2 <beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xmlns:p="http://www.springframework.org/schema/p"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xmlns:aop="http://www.springframework.org/schema/aop"
7 xmlns:tx="http://www.springframework.org/schema/tx"
8 xsi:schemaLocation="http://www.springframework.org/schema/beans
9 http://www.springframework.org/schema/beans/spring-beans.xsd
10 http://www.springframework.org/schema/context
11 http://www.springframework.org/schema/context/spring-context-4.1.xsd
12 http://www.springframework.org/schema/aop
13 http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
14 http://www.springframework.org/schema/tx
15 http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
16 ">
17
18 <!--启用注解-->
19 <context:annotation-config></context:annotation-config>
20 <!--引入外部的属性文件jdbc.properties-->
21 <context:property-placeholder location="classpath*:jdbc.properties"></context:property-placeholder>
22 <!--配置扫描路径-->
23 <context:component-scan base-package="com.blb"></context:component-scan>
24 <!--将druid连接池加入到IOC容器中-->
25 <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
26 <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
27 <property name="url" value="jdbc:mysql://localhost:3306/rbac2?useUnicode=true&characterEncoding=utf8&characterSetResults=utf8"></property>
28 <property name="username" value="root"></property>
29 <property name="password" value="root"></property>
30
31 </bean>
32
33 <!--分页插件-->
34 <bean id="pageHelper" class="com.github.pagehelper.PageInterceptor">
35 <property name="properties">
36 <props>
37 <prop key="helperDialect">mysql</prop>
38 </props>
39 </property>
40 </bean>
41
42
43 <!--sqlSessionFactoryBean加入到容器中-->
44 <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
45 <property name="dataSource" ref="dataSource"></property>
46 <property name="plugins">
47 <array>
48 <ref bean="pageHelper"></ref>
49 </array>
50 </property>
51 <property name="typeAliasesPackage" value="com.blb.dto"></property>
52 <property name="mapperLocations" value="classpath*:*com/blb/mapper/*.xml"></property>
53 </bean>
54 <!--sqlSessionTemplate-->
55 <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
56 <constructor-arg index="0" ref="sqlSessionFactoryBean"></constructor-arg>
57 </bean>
58 <!--配置jdbc包中切面-->
59 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
60 <property name="dataSource" ref="dataSource"></property>
61 </bean>
62 <!--配置建议规则-->
63 <tx:advice id="tx" transaction-manager="transactionManager">
64 <tx:attributes>
65 <tx:method name="get*" read-only="true"/>
66 <tx:method name="select*" read-only="true"></tx:method>
67 <tx:method name="query*" read-only="true"></tx:method>
68 <tx:method name="insert*" propagation="REQUIRED"></tx:method>
69 <tx:method name="save*" propagation="REQUIRED"></tx:method>
70 <tx:method name="update*" propagation="REQUIRED"></tx:method>
71 <tx:method name="modify*" propagation="REQUIRED"></tx:method>
72 <tx:method name="remove*" propagation="REQUIRED"></tx:method>
73 <tx:method name="delete*" propagation="REQUIRED"></tx:method>
74 </tx:attributes>
75 </tx:advice>
76
77 <!--开启切面代理-->
78 <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
79 <!--先来实现关注点-->
80 <aop:config>
81 <aop:pointcut id="service" expression="execution(* com.blb.service..*(..))"/>
82 <aop:advisor advice-ref="tx" pointcut-ref="service"></aop:advisor>
83 </aop:config>
84
85 </beans>
1 @Log4j
2 @WebServlet("/user")
3 public class UserController extends HttpServlet {
4
5 private UserService userService;
6
7
8 @Override
9 public void init() throws ServletException {
10 WebApplicationContext webcontainer = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
11 this.userService= (UserService)webcontainer.getBean("userServiceImpl");
12 //与IOC容器交互，从IOC容器里拿到userService单列
13 }
14
15
16 @Override
17 protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
18 String m = req.getParameter("m");
19 if(m.equals("save"))
20 {
21 save(req,resp);
22 }
23 else if(m.equals("update"))
24 {
25 update(req,resp);
26 }
27 else if(m.equals("delete"))
28 {
29 delete(req,resp);
30 }
31 else if(m.equals("select"))
32 {
33 select(req,resp);
34 }
35 else if(m.equals("selectAll"))
36 {
37 selectAll(req,resp);
38 }
39
40 }
1 <?xml version="1.0" encoding="UTF-8"?>
2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
5 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
6 version="3.1">
7 <!--1.告诉spring的核心配置文件叫什么名字-->
8 <context-param>
9 <param-name>contextConfigLocation</param-name>
10 <param-value>classpath*:applicationContext.xml</param-value>
11 </context-param>
12 <!--2.我给你一个监听器 监听器用来使用上面的配置，加载配置文件-->
13 <listener>
14 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
15 </listener>
16 </web-app>