1,创建maven工程,在pom.xml中添加jar包依赖。
<?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.travelsky.springboot</groupId>
<artifactId>03-springboot-mybatis</artifactId>
<version>1.0.0</version>
<!--继承springboot父级项目的依赖-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<!--属性配置-->
<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>
<!--springboot开发web项目的起步依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--加载mybatis整合springboot-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<!--MySQL的jdbc驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<!--配置mybatis自动生成器插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.6</version>
<configuration>
<!--配置文件的位置-->
<configurationFile>GeneratorMapper.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
</project>
2,创建数据库springbootmb,创建表student
3,创建application.properties文件,指定mapper.xml文件的路径和数据源信息。
#指定mapper.xml文件的路径
mybatis.mapper-locations=classpath:com/travelsky/springboot/mapper/*.xml
########################################################
###datasource -- 指定mysql数据库连接信息.
########################################################
spring.datasource.url = jdbc:mysql://localhost:3306/springboot
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
4,将mybatis自动生成器GeneratorMapper.xml放入工程中
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--指定连接数据库的JDBC驱动包所在位置,指定到你本机的完整路径
需要确保本地maven仓库中是否含有此数据库驱动jar包-->
<classPathEntry location="E:/repository/mysql/mysql-connector-java/5.1.41/mysql-connector-java-5.1.41.jar"/>
<!--配置table表信息内容体,targetRuntime指定采用mybatis3的版本-->
<context id="tables" targetRuntime="MyBatis3">
<!--抑制生成注释,由于生成的注释都是英文的,可以不让它生成-->
<commentGenerator>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--配置数据库连接信息 每次需手动修改数据库名和用户名密码-->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/springbootmb"
userId="root"
password="root">
</jdbcConnection>
<!--生成model类,targetPackage指定model类的包名,targetProject指定生成的model放在工程下面那个位置-->
<javaModelGenerator targetPackage="com.travelsky.springboot.model" targetProject="src/main/java">
<property name="enableSubPackages" value="false"/>
<property name="trimStrings" value="false"/>
</javaModelGenerator>
<!--生成mapper类,targetPackage指定mapper类的包名,targetProject指定生成的mapper放在工程下面那个位置-->
<sqlMapGenerator targetPackage="com.travelsky.springboot.mapper" targetProject="src/main/java">
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!--生成Mybatis的Mapper.xml文件,targetPackage指定mapper类的包名,targetProject指定生成的mapper.xml放在eclipse哪个工程下面-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.travelsky.springboot.mapper"
targetProject="src/main/java">
<property name="enableSubpackages" value="false"/>
</javaClientGenerator>
<!--数据库表名以及对应的java模型类名
tableName:数据库中表名 domainObjectName:生成的实体类名-->
<table tableName="student"
domainObjectName="Student"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false"/>
</context>
</generatorConfiguration>
5,自动生成model和mapper
在IDEA的Maven Project中刷新一下可以看到mybatis-generator,双击下面的mybatis-gennerator:generate
可以看到控制台BUILD SUCCESS
此时工程下生成了model和mapper
此时算是真正准备好了springboot与mybatis整合的开发环境
6,创建springboot的main方法 application.java,启动springboot程序
加上@SpringBootApplication注解开启自动扫描
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}
7,在生成的mapper接口文件类上加@Mapper注解,或者在运行的主类添加@MapperScan(“com.travelsky.springboot.mapper”)注解扫描
如果加上mapper注解后在接口实现类中注入mapper时候报错,这是IEDA工具报错,按照下图步骤将错误修改为警告即可
8,创建service和controller访问数据库返回json格式数据
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentMapper studentMapper;
@Override
public List<Student> getAll() {
return studentMapper.selectAll();
}
}
@RestController
public class MyBatisController {
@Autowired
private StudentServiceImpl getAllStudentServiceImpl;
@ResponseBody
@RequestMapping("boot/getAll")
public Object getAllStudent(){
//调用service
List<Student> list = getAllStudentServiceImpl.getAll();
return list;
}
}
访问结果: