全注解方式整合spring+mybatis模拟springboot整合

实习工作中的项目使用到了springboot。虽然springboot使用简单但是默认配置和注解挺多。如果boot想使用熟练前提要对ssm整合比较熟悉。以前开发习惯使用xml配置文件，但是使用boot后才发现注解才是王道。现在将spring+mybatis使用全注解完成整合，并且配置事务。文件中的注解与Xml进行了比对。直接上代码。

@Repositorypublic interface EmpDao {Emp selectById(String id);void addSalary(String id);void updateSalary(String id);}

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!-- EmpMapper.xml --><mapper namespace="cn.rjx.spring.smanno.EmpDao"><select id="selectById"  resultType="cn.rjx.spring.smanno.Emp">select * from emp where id=#{id}</select><update id="addSalary">update emp set salary='6000' where id=#{id}</update><update id="updateSalary">update emp set salary='4000' where id=#{id}</update></mapper>

@Servicepublic class EmpService {@AutowiredEmpDao empDao;public Emp selectById(String id){return empDao.selectById(id);}@Transactional()public void accountChange() {empDao.addSalary("1");int a= 10/0;empDao.updateSalary("2");}}

@MapperScan(basePackages="cn.rjx.spring.smanno")/** * 替代：<!-- 配置扫描器 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">    <!-- 扫描me.gacl.dao这个包以及它的子包下的所有映射接口类 -->    <property name="basePackage" value="cn.rjx.spring.sm" />    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /></bean> * */@EnableTransactionManagement/** 替代： * <tx:annotation-driven transaction-manager="transactionManager" />  */@Configurationpublic class MybatisConfig {/**  替代 * <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">        <property name="url" value="jdbc:mysql://localhost:3306/test" />        <property name="username" value="root" />        <property name="password" value="123456" />        </bean> */@Beanpublic DruidDataSource dataSource(){DruidDataSource dataSource=new DruidDataSource();dataSource.setUrl("jdbc:mysql://localhost:3306/test");dataSource.setUsername("root");dataSource.setPassword("123456");return dataSource;}/** <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->        <property name="dataSource" ref="dataSource" />        <property name="mapperLocations" value="classpath:cn/rjx/spring/sm/*Mapper.xml" />    </bean> */@Beanpublic SqlSessionFactory sqlSessionFactory() throws Exception{final SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();sqlSessionFactory.setDataSource(dataSource());sqlSessionFactory.setMapperLocations(getResource("", "cn/rjx/spring/smanno/*Mapper.xml"));return sqlSessionFactory.getObject();}/** * 替代：<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean> */@Beanpublic PlatformTransactionManager transactionManager(){return new DataSourceTransactionManager(dataSource());}public Resource[] getResource(String basePackage, String pattern) throws IOException {String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + ClassUtils.convertClassNameToResourcePath(new StandardEnvironment().resolveRequiredPlaceholders(basePackage)) + "/" + pattern;Resource[] resources = new PathMatchingResourcePatternResolver().getResources(packageSearchPath);return resources;}}

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations={"classpath:cn/rjx/spring/smanno/bean.xml"}) //加载配置文件   @Component@ComponentScan(basePackages="cn.rjx.spring.smanno")/**替代： * <context:component-scan base-package="cn.rjx.spring.sm"></context:component-scan> */public class EmpAction {@AutowiredEmpService service;@Testpublic void test01(){Emp emp = service.selectById("1");System.out.println(emp);}@Testpublic void test02(){System.out.println("------");service.accountChange();}}

我的bean.xml只加入了测试的那个类，作为spring加载的入口

<bean id="empAction" class="cn.rjx.spring.smanno.EmpAction"></bean>

测试查询方法可用.事务可用！pom文件。

<dependencies><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-context</artifactId>    <version>5.0.0.RELEASE</version></dependency>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>3.8.1</version>      <scope>test</scope>    </dependency>    <!-- https://mvnrepository.com/artifact/org.springframework/spring-test --> <dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-test</artifactId>    <version>5.0.0.RELEASE</version>    <scope>test</scope></dependency> <!-- springAop --> <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-aspects</artifactId>    <version>5.0.0.RELEASE</version></dependency><!-- spring事务 --><!-- https://mvnrepository.com/artifact/org.springframework/spring-tx --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-tx</artifactId>    <version>5.0.0.RELEASE</version></dependency><!-- spring整合mybatis --><!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --><dependency>    <groupId>org.mybatis</groupId>    <artifactId>mybatis-spring</artifactId>    <version>1.3.1</version></dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --><dependency>    <groupId>org.mybatis</groupId>    <artifactId>mybatis</artifactId>    <version>3.4.5</version></dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --><dependency>    <groupId>mysql</groupId>    <artifactId>mysql-connector-java</artifactId>    <version>3.1.14</version></dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/druid --><dependency>    <groupId>com.alibaba</groupId>    <artifactId>druid</artifactId>    <version>1.1.4</version></dependency><!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc  配置数据源需要--><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-jdbc</artifactId>    <version>5.0.0.RELEASE</version></dependency>      </dependencies>