javamagicsun 2020-04-18
一、pxm.xml中引入mybatis-generator并配置
在build节点下的plugins下添加org.mybatis.generator 示例代码如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.dcrenl.test</groupId> <artifactId>test</artifactId> <version>0.0.1-SNAPSHOT</version> <name>test</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.2</version> </dependency> <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> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <configuration> <configurationFile>src/main/resources/generatorConfig.xml</configurationFile> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <!--加入下面这个依赖--> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> </dependencies> </plugin> </plugins> </build> </project>
二、在resources文件夹下新建mybatis-generator配置xml文件,内容如下:
<?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"> <!-- 配置生成器 --> <generatorConfiguration> <!--classPathEntry:数据库的JDBC驱动,换成你自己的驱动位置 可选 --> <!-- <classPathEntry location="C:\Users\dcrenl\.m2\repository\mysql\mysql-connector-java\8.0.19\mysql-connector-java-8.0.19.jar"/>--> <!-- 一个数据库一个context,defaultModelType="flat" 大数据字段,不分表 --> <context id="MysqlTables" targetRuntime="MyBatis3" defaultModelType="flat"> <!-- 自动识别数据库关键字,默认false,如果设置为true,根据SqlReservedWords中定义的关键字列表;一般保留默认值,遇到数据库关键字(Java关键字),使用columnOverride覆盖 --> <property name="autoDelimitKeywords" value="true"/> <!-- 生成的Java文件的编码 --> <property name="javaFileEncoding" value="utf-8"/> <!-- beginningDelimiter和endingDelimiter:指明数据库的用于标记数据库对象名的符号,比如ORACLE就是双引号,MYSQL默认是`反引号; --> <property name="beginningDelimiter" value="`"/> <property name="endingDelimiter" value="`"/> <!-- 格式化java代码 --> <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/> <!-- 格式化XML代码 --> <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/> <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/> <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/> <!-- 注释 --> <commentGenerator> <property name="suppressAllComments" value="true"/><!-- 是否取消注释 --> <property name="suppressDate" value="false"/> <!-- 是否生成注释代时间戳--> </commentGenerator> <!-- jdbc连接--> <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/test?serverTimezone=UTC&setUnicode=true&characterEncoding=utf8" userId="root" password="root"> <!-- 防止生成其它库的表 --> <property name="nullCatalogMeansCurrent" value="true"/> </jdbcConnection> <!-- 类型转换 --> <javaTypeResolver> <!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) --> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 生成实体类地址 --> <javaModelGenerator targetPackage="com.dcrenl.examinersystem.entity" targetProject="src/main/java"> <!-- 是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false"/> <!-- 从数据库返回的值去掉前后空格 --> <property name="trimStrings" value="true"/> </javaModelGenerator> <!-- 生成map.xml文件存放地址 --> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"> <property name="enableSubPackages" value="false"/> </sqlMapGenerator> <!-- 生成接口dao(mapper) --> <javaClientGenerator targetPackage="com.dcrenl.examinersystem.mapper" targetProject="src/main/java" type="XMLMAPPER"> <property name="enableSubPackages" value="false"/> <property name="nullCatalogMeansCurrent" value="true"/> </javaClientGenerator> <!-- table可以有多个,每个数据库中的表都可以写一个table,tableName表示要匹配的数据库表,也可以在tableName属性中通过使用%通配符来匹配所有数据库表,只有匹配的表才会自动生成文件 enableSelectByPrimaryKey相应的配置表示是否生成相应的接口 --> <table tableName="t_%" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" enableSelectByPrimaryKey="true" enableUpdateByPrimaryKey="true" enableDeleteByPrimaryKey="true" > <property name="useActualColumnNames" value="false"/> </table> </context> </generatorConfiguration>
三、点击IDEA右侧“Maven”栏目,在“Plugins”中找到“mybatis-generator”展开找到“mybatis-generator:generate”,右键,“Run Maven Build” 生成