Spring Boot 整合 MyBatis 连接 Oracle数据库

1、Spring Boot项目添加MyBatis依赖和Oracle驱动：

<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>11.2.0.1.0</version>
</dependency>

2、配置application.properties：

#spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#spring.datasource.url=jdbc:mysql://localhost:3306/ems
#spring.datasource.username=root
#spring.datasource.password=root
mybatis.mapper-locations=classpath:/com/example/demo/mapper/*.xml
server.port=9090
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@134.32.9.247:1700/mbss
spring.datasource.username=dbrtadm
spring.datasource.password=dbrtadm

3、新建实体类，注意与数据库字段对应：

package com.example.demo.entity;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class User {
	public int id;
	public String order_id;
}

4、新建mapper（xml）：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.example.demo.dao.UserMapper">  
    <select id = "listUser" resultType="com.example.demo.entity.User">
        select * from t_ps_order_qr
    </select>
</mapper>

5、新建dao接口：

package com.example.demo.dao;
import java.util.List;

import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserMapper {
	public List listUser();
}

　此处应加@Mapper注解，interface的方法名对应xml的标签id。

6、新建controller：

package com.example.demo.controller;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.example.demo.dao.UserMapper;

@RestController
public class TestController {
	@Resource
	UserMapper um;
	
	@GetMapping("/listu")
	public List listUser() {
		return um.listUser();
	}
}

　启动主程序，浏览器访问http://localhost:9090/listu,

---

 

注意oracle驱动版本问题，版本不对可能会报错。

需要连接MySQL只需将驱动和URL更改为MySQL的即可，其余与Oracle相同。

如有错误欢迎指正。