- Controller层 接收页面所有请求,根据请求去调用处理这个请求的服务
- Service层 是一个系统的核心,包含了所有服务,根据自己实现的功能去执行元操作(数据库操作)
- mapper层 数据库操作的集合
- domain 层 实体类
需要注意的点:
- 在启动类中添加:
@MapperScan({
"com.example.demo.mapper"})
- mybatis 需要在pom.xml中添加:
<!--依赖-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<!--插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.4.0</version>
<configuration>
<configurationFile>${basedir}/src/main/resources/mybatis/generator/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
</dependencies>
</plugin>
- 新建文件 resources->mabatis->generator->generatorConfig.xml
<?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="MySQLTables" targetRuntime="MyBatis3">
<plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>
<commentGenerator>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--覆盖生成XML文件-->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/databasename?serverTimezone=UTC"
userId="root"
password="root">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 实体类-->
<javaModelGenerator targetPackage="com.example.demo.common.domain" targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!--Mapper 映射文件-->
<sqlMapGenerator targetPackage="mybatis.mapper" targetProject="src/main/resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!--Dao 接口-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.example.demo.mapper"
targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<table tableName="tablename" domainObjectName="Tablename"/>
<!-- <table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >
<property name="useActualColumnNames" value="true"/>
<generatedKey column="ID" sqlStatement="DB2" identity="true" />
<columnOverride column="DATE_FIELD" property="startDate" />
<ignoreColumn column="FRED" />
<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
</table>-->
</context>
</generatorConfiguration>
- application.propertis中
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost:3306/databasename?serverTimezone=UTC
#&useSSL=true&autoReconnect=true&failOverReadOnly=false
mybatis.mapper-locations=classpath:/mybatis/mapper/*.xml, classpath:/mybatis/mapper/extend/*.xml
- 目录结构