Spring Boot 整合 MyBatis 連接 Oracle數據庫

1、Spring Boot項目添加MyBatis依賴和Oracle驅動：

<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、新建實體類，注意與數據庫字段對應：

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();
}

　此處應加@Mapper注解，interface的方法名對應xml的標簽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();
	}
}

　啟動主程序，瀏覽器訪問http://localhost:9090/listu,

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注意oracle驅動版本問題，版本不對可能會報錯。

需要連接MySQL只需將驅動和URL更改為MySQL的即可，其余與Oracle相同。

如有錯誤歡迎指正。