7.1 KiB
7.1 KiB
spring 整合 mybatis（xml配置方式）
一、说明
1.1 项目结构
1.2 项目依赖
除了spring相关依赖外，还需要导入数据库驱动和对应的mybatis依赖包
<!--jdbc 相关依赖包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3.0</version>
</dependency>
<!--mybatis 依赖包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
二、spring 整合 mybatis
2.1 在resources文件夹下新建数据库配置文件jdbc.properties及其映射类
# mysql 数据库配置
mysql.driverClassName=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql://localhost:3306/mysql
mysql.username=root
mysql.password=root
# oracle 数据库配置
oracle.driverClassName=oracle.jdbc.driver.OracleDriver
oracle.url=jdbc:oracle:thin:@//IP地址:端口号/数据库实例名
oracle.username=用户名
oracle.password=密码
@Configuration
@PropertySource(value = "classpath:mysql.properties")
@Data
public class DataSourceConfig {
@Value("${mysql.driverClassName}")
private String driverClassName;
@Value("${mysql.url}")
private String url;
@Value("${mysql.username}")
private String username;
@Value("${mysql.password}")
private String password;
}
2.2 配置数据源和mybatis会话工厂、定义事务管理器
/**
* @author : heibaiying
*/
@Configuration
@EnableTransactionManagement // 开启声明式事务处理 等价于xml中<tx:annotation-driven/>
@ComponentScan(basePackages = {"com.heibaiying.*"})
public class DatabaseConfig {
/* @Autowired
* private DataSourceConfig sourceConfig;
* 不要采用这种方式注入DataSourceConfig,由于类的加载顺序影响会报空指针异常
* 最好的方式是在DriverManagerDataSource构造中采用参数注入
*/
/**
* 配置数据源
*/
@Bean
public DriverManagerDataSource dataSource(DataSourceConfig sourceConfig) {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(sourceConfig.getDriverClassName());
dataSource.setUrl(sourceConfig.getUrl());
dataSource.setUsername(sourceConfig.getUsername());
dataSource.setPassword(sourceConfig.getPassword());
return dataSource;
}
/**
* 配置mybatis 会话工厂
*
* @param dataSource 这个参数的名称需要保持和上面方法名一致 才能自动注入,因为
* 采用@Bean注解生成的bean 默认采用方法名为名称，当然也可以在使用@Bean时指定name属性
*/
@Bean
public SqlSessionFactoryBean sessionFactoryBean(DriverManagerDataSource dataSource) throws IOException {
SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource);
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
sessionFactoryBean.setMapperLocations(resolver.getResources("classpath*:/mappers/**/*.xml"));
sessionFactoryBean.setConfigLocation(resolver.getResource("classpath:mybatisConfig.xml"));
return sessionFactoryBean;
}
/**
* 配置mybatis 会话工厂
*/
@Bean
public MapperScannerConfigurer MapperScannerConfigurer() {
MapperScannerConfigurer configurer = new MapperScannerConfigurer();
configurer.setSqlSessionFactoryBeanName("sessionFactoryBean");
configurer.setBasePackage("com.heibaiying.dao");
return configurer;
}
/**
* 定义事务管理器
*/
@Bean
public DataSourceTransactionManager transactionManager(DriverManagerDataSource dataSource) {
DataSourceTransactionManager manager = new DataSourceTransactionManager();
manager.setDataSource(dataSource);
return manager;
}
}
2.3 新建mybtais配置文件，按照需求配置额外参数， 更多settings配置项可以参考官方文档
<?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">
<!-- mybatis 配置文件 -->
<configuration>
<settings>
<!-- 开启驼峰命名 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!-- 打印查询sql -->
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
</configuration>
<!--更多settings配置项可以参考官方文档: <a href="http://www.mybatis.org/mybatis-3/zh/configuration.html"/>-->
2.4 新建查询接口及其对应的mapper文件
public interface MysqlDao {
List<Relation> get();
}
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.heibaiying.dao.MysqlDao">
<select id="queryById" resultType="com.heibaiying.bean.Relation">
SELECT help_keyword_id AS id,name
FROM HELP_KEYWORD
WHERE HELP_KEYWORD_ID = #{id}
</select>
</mapper>
public interface OracleDao {
List<Flow> queryById(long id);
}
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.heibaiying.dao.OracleDao">
<select id="queryById" resultType="com.heibaiying.bean.Flow">
select * from APEX_030200.WWV_FLOW_CALS where ID = #{id}
</select>
</mapper>
2.5 新建测试类进行测试
@RunWith(SpringRunner.class)
@ContextConfiguration(classes = {DatabaseConfig.class})
public class MysqlDaoTest {
@Autowired
private MysqlDao mysqlDao;
@Test
public void get() {
List<Relation> relations = mysqlDao.queryById("691");
if (relations != null) {
for (Relation relation : relations) {
System.out.println(relation.getId() + " " + relation.getName());
}
}
}
}
@RunWith(SpringRunner.class)
@ContextConfiguration(classes = {DatabaseConfig.class})
public class OracleDaoTest {
@Autowired
private OracleDao oracleDao;
@Test
public void get() {
List<Flow> flows = oracleDao.queryById(217584603977429772L);
if (flows != null) {
for (Flow flow : flows) {
System.out.println(flow.getId() + " " + flow.getPlugId());
}
}
}
}