1.首先需要引入MyBatis的maven依赖
<dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> </dependency>2.配置Java实体类
package com.snowy.manager.config; import org.mybatis.generator.api.JavaTypeResolver; import org.mybatis.generator.api.MyBatisGenerator; import org.mybatis.generator.api.Plugin; import org.mybatis.generator.config.*; import org.mybatis.generator.exception.InvalidConfigurationException; import org.mybatis.generator.internal.DefaultShellCallback; import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import java.util.Properties; /** * Created by win7 on 2018/5/17. */ public class GeneratorConfig { private static final Properties props=new Properties(); public static void main(String[] args){ try { /*配置xml配置项*/ List<String> warnings = new ArrayList<String>(); boolean overwrite = true; Configuration config = new Configuration(); Context context = new Context(ModelType.CONDITIONAL); context.setTargetRuntime("MyBatis3Simple"); context.setId("defaultContext"); //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 context.addProperty("autoDelimitKeywords","true"); //生成的Java文件的编码 context.addProperty("javaFileEncoding","utf-8"); context.addProperty("beginningDelimiter","`"); context.addProperty("endingDelimiter","`"); //格式化java代码 context.addProperty("javaFormatter","org.mybatis.generator.api.dom.DefaultJavaFormatter"); //格式化xml代码 context.addProperty("xmlFormatter","org.mybatis.generator.api.dom.DefaultXmlFormatter"); //格式化信息 PluginConfiguration pluginConfiguration = new PluginConfiguration(); pluginConfiguration.setConfigurationType("org.mybatis.generator.plugins.SerializablePlugin"); pluginConfiguration.setConfigurationType("org.mybatis.generator.plugins.ToStringPlugin"); context.addPluginConfiguration(pluginConfiguration); //设置是否生成注释 CommentGeneratorConfiguration commentGeneratorConfiguration = new CommentGeneratorConfiguration(); commentGeneratorConfiguration.addProperty("suppressAllComments","true"); commentGeneratorConfiguration.addProperty("suppressDate","true"); context.setCommentGeneratorConfiguration(commentGeneratorConfiguration); //设置连接数据库 JDBCConnectionConfiguration jdbcConnectionConfiguration = new JDBCConnectionConfiguration(); jdbcConnectionConfiguration.setDriverClass("com.mysql.jdbc.Driver"); jdbcConnectionConfiguration.setConnectionURL("jdbc:mysql://localhost:3306/sb_01"); jdbcConnectionConfiguration.setPassword("root"); jdbcConnectionConfiguration.setUserId("root"); context.setJdbcConnectionConfiguration(jdbcConnectionConfiguration); JavaTypeResolverConfiguration javaTypeResolverConfiguration = new JavaTypeResolverConfiguration(); //是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） javaTypeResolverConfiguration.addProperty("forceBigDecimals","false"); context.setJavaTypeResolverConfiguration(javaTypeResolverConfiguration); //生成实体类的地址 JavaModelGeneratorConfiguration javaModelGeneratorConfiguration = new JavaModelGeneratorConfiguration(); javaModelGeneratorConfiguration.setTargetPackage("com.snowy.manager.model"); javaModelGeneratorConfiguration.setTargetProject("src/main/java"); javaModelGeneratorConfiguration.addProperty("enableSubPackages","false"); javaModelGeneratorConfiguration.addProperty("trimStrings","true"); context.setJavaModelGeneratorConfiguration(javaModelGeneratorConfiguration); //生成的xml的地址 SqlMapGeneratorConfiguration sqlMapGeneratorConfiguration = new SqlMapGeneratorConfiguration(); sqlMapGeneratorConfiguration.setTargetProject("src/main/resources"); sqlMapGeneratorConfiguration.setTargetPackage("mappers"); sqlMapGeneratorConfiguration.addProperty("enableSubPackages","false"); context.setSqlMapGeneratorConfiguration(sqlMapGeneratorConfiguration); //生成mapxml对应client，也就是接口dao JavaClientGeneratorConfiguration javaClientGeneratorConfiguration = new JavaClientGeneratorConfiguration(); javaClientGeneratorConfiguration.setTargetPackage("com.snowy.manager.dao"); javaClientGeneratorConfiguration.setTargetProject("src/main/java"); javaClientGeneratorConfiguration.setConfigurationType("XMLMAPPER"); javaClientGeneratorConfiguration.addProperty("enableSubPackages","false"); context.setJavaClientGeneratorConfiguration(javaClientGeneratorConfiguration); TableConfiguration tableConfiguration = new TableConfiguration(context); tableConfiguration.setTableName("userrole"); tableConfiguration.setCountByExampleStatementEnabled(true); tableConfiguration.setUpdateByExampleStatementEnabled(true); tableConfiguration.setDeleteByExampleStatementEnabled(true); tableConfiguration.setInsertStatementEnabled(true); tableConfiguration.setDeleteByPrimaryKeyStatementEnabled(true); tableConfiguration.setSchema("sb_01"); GeneratedKey generatedKey=new GeneratedKey("id","MySql",true,null); tableConfiguration.setGeneratedKey(generatedKey); context.addTableConfiguration(tableConfiguration); config.addContext(context); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } catch (InvalidConfigurationException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } } }虽然配置的比较繁琐，但是应该还是很清晰的。适合初学者观看学习。
基本上是按找Mybatis官网的规范来进行配置的 按照xml文件中所需要的内容 进行相应的配置
<?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> <!--执行generator插件生成文件的命令： call mvn mybatis-generator:generate -e --> <!-- 引入配置文件 --> <properties resource="mybatisGeneratorinit.properties"/> <!--classPathEntry:数据库的JDBC驱动,换成你自己的驱动位置 可选 --> <!--<classPathEntry location="D:\generator_mybatis\mysql-connector-java-5.1.24-bin.jar" /> --> <!-- 一个数据库一个context --> <!--defaultModelType="flat" 大数据字段，不分表 --> <context id="mysql" targetRuntime="MyBatis3Simple" 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="false"/><!-- 是否取消注释 --> <property name="suppressDate" value="true" /> <!-- 是否生成注释代时间戳--> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="${jdbc_driver}" connectionURL="${jdbc_url}" userId="${jdbc_user}" password="${jdbc_password}" /> <!-- 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.snowy.manager.model" targetProject="${project}" > <property name="enableSubPackages" value="false"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!-- 生成mapxml文件 --> <sqlMapGenerator targetPackage="mappers" targetProject="${resources}" > <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- 生成mapxml对应client，也就是接口dao --> <javaClientGenerator targetPackage="com.snowy.manager.dao" targetProject="${project}" type="XMLMAPPER" > <property name="enableSubPackages" value="false" /> </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 --> <table tableName="user" enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="true" enableSelectByExample="true" selectByExampleQueryId="true"> <property name="constructorBased" value="false" /> <!-- 数据库表主键 --> <generatedKey column="id" sqlStatement="JDBC" identity="true" /> </table> </context> </generatorConfiguration>阿里云优惠券
