springboot jdbc整合

1.创建项目

2.pom.xml中编写坐标文件

<dependencies>

      <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
      <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid</artifactId>
         <version>1.1.9</version>
      </dependency>

      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-jdbc</artifactId>
      </dependency>
      <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <scope>runtime</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-thymeleaf</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      <dependency>
         <groupId>org.mybatis.spring.boot</groupId>
         <artifactId>mybatis-spring-boot-starter</artifactId>
         <version>1.3.2</version>
      </dependency>

      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </dependency>
   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>


</project>

3.创建application.yml文件

spring:
  datasource:
    username: root
    password: 12345
    url: jdbc:mysql://localhost:3306/db0226
    driver-class-name: com.mysql.jdbc.Driver
#   数据源其他配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

4.cn.vp.config.DataSourcesConfig

@Configuration
public class DataSourcesConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource getDataSources() {

        return new DruidDataSource();
    }

5.编写bean层实体类

public class User {

    private Integer id;
    private String username;
    private String password;

    @Override
    public String toString() {
        return "user{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }

    public User() {
    }

    public User(Integer id, String username, String password) {
        this.id = id;
        this.username = username;
        this.password = password;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

6.编写Dao层curd

@Mapper
public interface UserDao {

    @Insert("INSERT INTO `hehe` (`username`, `password`) VALUES (#{username}, #{password})")
    public int addUser(User user);

    @Delete("DELETE FROM  `hehe` where id=#{id}")
    public int deleteById(Integer id);

    @Update("UPDATE `hehe` SET `username`='#{username}', `password`=#{password} WHERE (`id`=#{id})")
    public int updateUser(User user);

    @Select("SELECT  * from `hehe` where id=#{id}")
    public User queryById(@Param("id") Integer id);


}

7.在Application中编写注册Dao层

@MapperScan(value = "cn.vp.dao")
@SpringBootApplication
public class JdbccurdApplication  {


   public static void main(String[] args) {

      SpringApplication.run(JdbccurdApplication.class, args);
   }


}

8.在test中测试curd方法的运行

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserDaoTest {
    @Autowired
    private UserDao userDao;

    @Test
    public void addUser() throws Exception {
        User user=new User();
        user.setUsername("吴艳丽");
        user.setPassword("2131");
        userDao.addUser(user);
    }

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