springboot整合mybatis与oracle

 之前一直没有时间写点总结，对于一些细节总是查阅资料把握不够，今天梳理下，完善下方便后续快速迭代。

准备工作。创建一张表

--单表操作 CREATE TABLE tb_user ( 
userid number(4) NOT NULL primary key,
 user_name varchar2(100) unique not null,
 pwd varchar2(100), 
 age number(3) , 
 sex varchar(2), 
 birthday date
 );
 create sequence seq_user; --插入测试数据 
 insert into tb_user(userid,user_name,pwd,age,sex,birthday) values(seq_user.nextval,'张三','123456',10,'男',sysdate);
 insert into tb_user(userid,user_name,pwd,age,sex,birthday) values(seq_user.nextval,'李四','123456',10,'男',sysdate); 
 insert into tb_user(userid,user_name,pwd,age,sex,birthday) values(seq_user.nextval,'王五','123456',10,'男',sysdate); 
 insert into tb_user(userid,user_name,pwd,age,sex,birthday) values(seq_user.nextval,'赵六','123456',10,'男',sysdate); 
 select * from tb_user;

既然是springboot整合mybatis + oracle

0 添加环境信息，贴上application.properties

spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl
spring.datasource.username=scott
spring.datasource.password=****

mybatis.mapper-locations=classpath:mapper/*Mapper.xml
mybatis.type-aliases-package=com.pian.dto

1 贴上pom依赖 ，oracle使用此版本可以直接maven下载。

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
  </parent>


    <dependency>
          <groupId>org.mybatis.spring.boot</groupId>
          <artifactId>mybatis-spring-boot-starter</artifactId>
          <version>1.3.2</version>
      </dependency>
      <dependency>
          <groupId>com.oracle</groupId>
          <artifactId>ojdbc6</artifactId>
          <version>11.2.0.3</version>
      </dependency>

2  创建dto实体

@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class User implements Serializable {
    private int userid ;
    private String userName;
    private String pwd ;
    private int age;
    private String sex;
    private Date birthday;
}

3 创建dao层，使用mapper注解，springboot会自动创建实体类

/**
 * @Auther: Administrator
 * @Date: 2020/2/8 0008 20:43
 * @Description:
        */
@Mapper
public interface UserMapper {
    //增
    User selectById(int userId);
}

4 创建service层

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public User selectById(int userId){
        return userMapper.selectById(userId);
    }
}

5 常见测试方法

/**
 * @Auther: Administrator
 * @Date: 2020/2/8 0008 21:14
 * @Description:
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = {App.class})
public class AppTest {

    @Autowired
    private UserService userService;

    @Test
    public void testSelectById(){
        User user = userService.selectById(2);
        System.out.println(user);
    }

}

6 直接测试开始，测试结果

0208 220431.810- WARN[           main] com.zaxxer.hikari.util.DriverDataSource -68: Registered driver with driverClassName=oracle.jdbc.driver.OracleDriver was not found, trying direct instantiation.
0208 220432.057- INFO[           main] com.zaxxer.hikari.pool.PoolBase         -516: HikariPool-1 - Driver does not support get/set network timeout for connections. (oracle.jdbc.driver.T4CConnection.getNetworkTimeout()I)
0208 220432.063- INFO[           main] com.zaxxer.hikari.HikariDataSource      -123: HikariPool-1 - Start completed.
User(userid=2, userName=null, pwd=123456, age=10, sex=男, birthday=Sat Feb 08 20:40:45 CST 2020)
0208 220432.239- INFO[       Thread-2] o.s.w.c.s.GenericWebApplicationContext  -993: Closing org.springframework.web.context.support.GenericWebApplicationContext@30b6ffe0: startup date [Sat Feb 08 22:04:27 CST 2020]; root of context hierarchy
0208 220432.264- INFO[       Thread-2] com.zaxxer.hikari.HikariDataSource      -381: HikariPool-1 - Shutdown initiated...
0208 220432.280- INFO[       Thread-2] com.zaxxer.hikari.HikariDataSource      -383: HikariPool-1 - Shutdown completed.

完美！！！ 

总结，传统的mybaits需要mybatis-config.xml,springboot整合后，直接在application.properties配置参数就可以了。

@mapper注解自动创建接口类。另外直接在启动类添加

@MapperScan("com.XX.dao") 也是直接可以的，@mapper注解就可以省略了。