文章目录
前言
Mybatis逆向工程配置
一、成果图
二、使用步骤
1.引入依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--main方法启动-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
<scope>runtime</scope>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
2.引入插件
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.4.0</version>
<configuration>
<!--此处需要注意， 文件与上面的文件匹配-->
<configurationFile>src/main/resources/generator.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<executions>
<execution>
<id>Generate MyBatis Artifacts</id>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<dependencies>
<!--插件式启动-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
</dependencies>
</plugin>
3.配置yml
spring:
datasource:
username: root
password: root
url: jdbc:mysql://localhost:3306/customer?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC&useAffectedRows=true
driver-class-name: com.mysql.jdbc.Driver
mybatis:
mapper-locations: classpath:mybatis/mapper/*.xml
type-aliases-package: com.mxf.code.entity
#配置:延迟加载
configuration:
lazy-loading-enabled: true
aggressive-lazy-loading: false
jdbc-type-for-null: null
cache-enabled: true
logging:
level:
com:
mxf:
code:
mapper: debug
4.配置generator.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>
<classPathEntry
location="D:\apache-maven-3.6.1\local_repository\mysql\mysql-connector-java\5.1.47\mysql-connector-java-5.1.47.jar"/>
<!-- targetRuntime 默认为MyBatis3DynamicSql，该值不会生成xml文件， 可选择Mybatis3 -->
<context id="default" targetRuntime="MyBatis3">
<property name="javaFileEncoding" value="UTF-8"/>
<plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>
<!--<plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>-->
<!-- optional，旨在创建class时，对注释进行控制 -->
<commentGenerator>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true"/>
<property name="suppressDate" value="true"/>
</commentGenerator>
<!-- 数据库的相关配置 -->
<jdbcConnection
driverClass="com.mysql.jdbc.Driver"
connectionURL=""
userId=""
password=""/>
<!-- 非必需，类型处理器，在数据库类型和java类型之间的转换控制-->
<!--type：自定义解析器-->
<javaTypeResolver type="com.mxf.code.resolver.DefaultJavaTypeResolver">
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 实体类生成的位置 -->
<!-- Model模型生成器,用来生成含有主键key的类，记录类 以及查询Example类
targetPackage 指定生成的model生成所在的包名
targetProject 指定在该项目下所在的路径
-->
<javaModelGenerator
targetPackage="com.mxf.code.entity"
targetProject=".\src\main\java">
<!-- 是否允许子包，即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="true"/>
<!-- 是否对model添加 构造函数 -->
<property name="constructorBased" value="false"/>
<!-- 是否对类CHAR类型的列的数据进行trim操作 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法，只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- *Mapper.xml 文件的位置 sqlMapGenerator-->
<sqlMapGenerator
targetPackage="mybatis/mapper"
targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- 客户端代码，生成易于使用的针对Model对象和XML配置文件 的代码
type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象
type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象
type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口
-->
<!-- Mapper 接口文件的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.mxf.code.mapper"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- 相关表的配置 -->
<table tableName="Test" domainObjectName="Test"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"
mapperName="TestMapper">
<generatedKey column="id_" sqlStatement="MySql"/>
</table>
</context>
</generatorConfiguration>
三、DefaultJavaTypeResolver
将数据库SMALLINT和TINYINT转换成Java的Integer类型
public class DefaultJavaTypeResolver extends JavaTypeResolverDefaultImpl {
public DefaultJavaTypeResolver() {
super();
typeMap.put(Types.SMALLINT, new JdbcTypeInformation("SMALLINT",
new FullyQualifiedJavaType(Integer.class.getName())));
typeMap.put(Types.TINYINT, new JdbcTypeInformation("TINYINT",
new FullyQualifiedJavaType(Integer.class.getName())));
}
}
四、启动Main
public class Main {
public static void main(String[] args) throws Exception {
List<String> warnings = new ArrayList<>();
// 如果已经存在生成过的文件是否进行覆盖
boolean overwrite = true;
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(Main.class.getResourceAsStream("/generator.xml"));
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator generator = new MyBatisGenerator(config, callback, warnings);
generator.generate(null);
}
}
五、生成Mapper大致效果
