SpringBoot整合MyBatis

- 数据库配置文件

SpringBoot将数据库的配置写在application.properties中，启动应用程序时会自动加载spring.datasource.*相关配置，数据源就会自动注入到sqlSessionFactory中，sqlSessionFactory会自动注入到Mapper中

application.properties:

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/resturant?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=daydayup01
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

可以省略spring.datasource.driver-class-name，因为SpringBoot会根据url推断出相应的drivEClassName

Model:

/**
* @author hetiantian
* 实体类
*/
public class Owner {
private Integer id;
private String name;

public Owner(Integer id, String name) {
this.id = id;
this.name = name;
}

public Integer getId() {
return id;
}

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

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

@Override
public String toString() {
return "Owner{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}

Dao层：

/**
* @aurhor hetiantian
* 数据化持久层接口
*/
@Repository
@Mapper
public interface OwnerMapper {
/**
* 查询出所有的owner
* @return
* */
@Select("select * from owner")
List<Owner> queryAllOwners();
}

SpringBoot是尽量减少配置,所以这里没有使用xml配置文件

@Mapper和@Repository既说明它是mapper接口，又是数据化持久层接口

Service层:

@Service
public class OwnerService {
@Autowired
private OwnerMapper ownerMapper;

public List<Owner> queryAllOwners() {
List<Owner> ownerList = ownerMapper.queryAllOwners();

if (ownerList == null || ownerList.size() == 0) {
throw new MyException("没有查询到任何信息");
}

return ownerList;
}

}

Controller层：

/**
* @author hetiantian
* 控制层
*/
@Controller
public class OwnerAction {
@Autowired
private OwnerService ownerService;

@RequestMapping("/queryAllOwners")
@ResponseBody
public List<Owner> queryAllOwners() {
return ownerService.queryAllOwners();
}
}

附:pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.squpt.springboot</groupId>
<artifactId>springbootdemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>springbootdemo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<!--mybatis整合springboot的依赖-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<!--mysql驱动依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>

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

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j</artifactId>
<version>1.3.4.RELEASE</version>
</dependency>
</dependencies>

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

</project>

附项目完整地址:https://github.com/TiantianUpup/SpringBootDemo