访问效果
springboot连接数据库需要整合jdbc与事务，那么改怎么处理，答案是不需要我们处理，springboot已经实现，我们只需在pom文件中引入对应的库然后简单配置即可实现。jdbc驱动的引入，别忘了还有mybatis引入。下面我们来实现下：
1、j在pom文件中引入dbc驱动与mybatis
<!--jdbc事务-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- mysql 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<!--mybatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>2、数据库连接池参数配置
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/mumu
username: "数据库账号"
password: "数据库密码"3、mybatis配置
#mybatis
# mybatis配置
mybatis:
# 实体类别名包路径
type-aliases-package: springbootdemo.pojo
# 映射文件路径
# mapper-locations: classpath:mappers/*.xml
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
4、application配置
在启动类上添加扫描包注解(推荐)： import tk.mybatis.spring.annotation.MapperScan;别导错包。
package springbootdemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;
@SpringBootApplication
@MapperScan("springbootdemo.mapper")
public class Application {
public static void main(String[] args){
SpringApplication.run(Application.class,args);
}
}
5、通用mapper配置
通用Mapper的作者也为自己的插件编写了启动器，我们直接引入即可。在项目的 pom.xml 文件中加入如下依赖，注意：一旦引入了通用Mapper的启动器，会覆盖Mybatis官方启动器的功能，因此需要移除对官方Mybatis启动器的依赖。
<!-- 通用mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.1.5</version>
</dependency>
6、编写UserMapper
package springbootdemo.mapper;
import springbootdemo.pojo.User;
import tk.mybatis.mapper.common.Mapper;
public interface UserMapper extends Mapper<User> {
}
7、user表（需要自行去mysql创建数据库表新增用户数据，sql语句见下一步）
package springbootdemo.pojo;
import lombok.Data;
import tk.mybatis.mapper.annotation.KeySql;
import javax.persistence.Id;
import javax.persistence.Table;
import java.util.Date;
@Data
@Table(name = "tb_user")
public class User{
// id
@Id
//开启主键自动回填
@KeySql(useGeneratedKeys = true)
private Long id;
// 用户名
private String userName;
// 密码
private String password;
// 姓名
private String name;
// 年龄
private Integer age;
// 性别，1男性，2女性
private Integer sex;
// 出生日期
private Date birthday;
// 创建时间
private Date created;
// 更新时间
private Date updated;
// 备注
private String note;
}8、sql信息
-- ----------------------------
-- Table structure for tb_user
-- ----------------------------
DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`user_name` varchar(100) DEFAULT NULL COMMENT '用户名',
`password` varchar(100) DEFAULT NULL COMMENT '密码',
`name` varchar(100) DEFAULT NULL COMMENT '姓名',
`age` int(10) DEFAULT NULL COMMENT '年龄',
`sex` tinyint(1) DEFAULT NULL COMMENT '性别，1男性，2女性',
`birthday` date DEFAULT NULL COMMENT '出生日期',
`note` varchar(255) DEFAULT NULL COMMENT '备注',
`created` datetime DEFAULT NULL COMMENT '创建时间',
`updated` datetime DEFAULT NULL COMMENT '更新时间',
PRIMARY KEY (`id`),
UNIQUE KEY `username` (`user_name`)
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of tb_user
-- ----------------------------
INSERT INTO `tb_user` VALUES ('1', 'sw', '123456', '千帆v', '30', '1', '1964-08-08', '李先生很棒', '2014-09-19 16:56:04', '2014-09-21 11:24:59');
INSERT INTO `tb_user` VALUES ('2', '34r', '123456', '李哇', '21', '2', '1995-01-01', '李李先生很棒', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('3', 'dsff', '123456', '王如何', '22', '2', '1994-01-01', '李先生很棒', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('4', 'ht', '123456', '张奥迪', '20', '1', '1996-09-01', '李先生很棒', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('5', 'grr', '123456', '李二', '28', '1', '1988-01-01', '李娜李先生很棒', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('6', 'rr', '123456', '李法人', '23', '1', '1993-08-08', '李雷李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('7', 'hh', '123456', '威威', '24', '2', '1992-08-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('8', 'hrr', '123456', '为如', '21', '2', '2008-07-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('9', 'kytt', '123456', '马搭', '18', '2', '2012-08-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('10', 'gvr', '123456', '安安', '45', '2', '1971-08-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('11', 'htrh', '123456', 'de', '33', '2', '1983-08-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
INSERT INTO `tb_user` VALUES ('12', 'wre', '123456', '马大哈', '46', '2', '1980-08-08', '李先生很棒', '2014-09-20 11:41:15', '2014-09-20 11:41:15');9、UserService编写
package springbootdemo.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import springbootdemo.mapper.UserMapper;
import springbootdemo.pojo.User;
@Service
public class UserService {
@Autowired(required=false)
private UserMapper userMapper;
//根据id查询
public User queryById(Long id) {
return userMapper.selectByPrimaryKey(id);
}
@Transactional
public void saveUser(User user) {
System.out.println("新增用户...");
userMapper.insertSelective(user);
}
}10、测试结果
package springbootdemo.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import springbootdemo.UserService.UserService;
import springbootdemo.pojo.User;
import javax.sql.DataSource;
@RestController
public class HelloController {
@Autowired
private UserService userService;
/**
* 根据id获取用户
* @param id 用户id
* @return 用户
*/
@GetMapping("/user/{id}")
public User queryById(@PathVariable Long id){
return userService.queryById(id);
}
}
11、测试输出结果
浏览器输入地址：http://localhost:8080/user/6
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@49e8af71] was not registered for synchronization because synchronization is not active
JDBC Connection [HikariProxyConnection@546085857 wrapping com.mysql.jdbc.JDBC4Connection@574e7689] will not be managed by Spring
==> Preparing: SELECT id,user_name,password,name,age,sex,birthday,created,updated,note FROM tb_user WHERE id = ?
==> Parameters: 6(Long)
<== Columns: id, user_name, password, name, age, sex, birthday, created, updated, note
<== Row: 6, lilei, 123456, 李雷, 23, 1, 1993-08-08, 2014-09-20 11:41:15.0, 2014-09-20 11:41:15.0, 李先生很棒
<== Total: 1
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@49e8af71]
