2.1Mybatis接入SpringBoot项目
1.SpringBoot的默认配置
在resources目录下新建SpringBoot的默认配置文件application.properties
通过一行简单的属性就能更改tomcat的端口server.port=8090
2.配置pom文件
<!--数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!--数据库连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.3</version>
</dependency>
<!--Mybatis依赖-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
3.配置文件application.properties,设置
mybatis.mapper-locations=classpath:mapping/*.xml
4.然后在resources目录下新建mapping目录
5.自动生成工具,生成数据库文件的映射
引入插件
<!--自动生成工具,生成数据库文件的映射-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<dependencies>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.41</version>
</dependency>
</dependencies>
<executions>
<execution>
<id>mybatis generator</id>
<phase>package</phase>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<configuration>
<!--允许移动生成的文件-->
<verbose>true</verbose>
<!--允许自动覆盖文件(生产环境中千万不要这样做)-->
<overwrite>true</overwrite>
<configurationFile>
src/main/resources/mybatis-generator.xml
</configurationFile>
</configuration>
</plugin>
2.2 Mybatis自动生成器的使用方式
1.新建文件src/main/resources/mybatis-generator.xml,从官网下载xml配置文件
http://www.mybatis.org/generator/configreference/xmlconfig.html
2.新建数据库
新建一个miaosha的数据库,并建立两张表,分别是user_info和user_password
3.修改配置文件
<?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>
<context id="DB2Tables" targetRuntime="MyBatis3">
<!--数据库链接地址账号密码-->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/miaosha"
userId="root"
password="123456">
</jdbcConnection>
<!--生成DataObject类存放位置-->
<javaModelGenerator targetPackage="com.miaoshaproject.dataobject" targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--生成映射文件存放位置-->
<sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!--生成Dao类存放位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.miaoshaproject.dao" targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!--生成对应表及类名-->
<!-- enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false"
这些属性是为了使得只生成简单查询的对应文件,去掉复杂查询的生成文件,因为一般开发中不太用的到-->
<table tableName="user_info" domainObjectName="UserDO"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false"></table>
<table tableName="user_password" domainObjectName="userPasswordDO"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false" ></table>
</context>
</generatorConfiguration>
4.生成文件
生成的··Mapper文件:
5.接入mysql数据源
在mybatis-generator.xml加入:
spring.datasource.name=miaosha
spring.datasource.url=jdbc:mysql://localhost:3306/miaosha
spring.datasource.username=root
spring.datasource.password=123456
#使用druid数据源
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
6.测试数据库
修改App类
@SpringBootApplication(scanBasePackages = {"com.miaoshaproject"})
@RestController
@MapperScan("com.miaoshaproject.dao")
public class App {
@Autowired
private UserDOMapper userDOMapper;
@RequestMapping("/")
public String home() {
UserDO userDO = userDOMapper.selectByPrimaryKey(1);
if (userDO == null) {
return "用户对象不存在";
} else {
return userDO.getName();
}
}
}
7.测试