mybatis逆向工程
Mybatis官方提供了逆向工程,可以针对单表自动生成mybatis代码(mapper.java\mapper.xml\po类) 也就是说,我们可以通过mybatis逆向工程生成dao,pojo,mapper.xml这些东东,节省我们写这些代码的时间,可以把更多的时间花在业务上
<!--设置编码--> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency> </dependencies>
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配置generatorConfig.xml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> <properties resource="db.properties"/> <context id="testTables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否去除自动生成的注释 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--数据库连接的信息:驱动类、连接地址、用户名、密码 ,加上“useSSL=false”是因为我SSL连接数据库出现了错误 --> <jdbcConnection driverClass="${mysql.driver}" connectionURL="${mysql.url}" userId="${mysql.username}" password="${mysql.password}"> </jdbcConnection> <!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成pojo类的位置 --> <javaModelGenerator targetPackage="pojo" targetProject=".\src\main\java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> <!-- 从数据库返回的值被清理前后的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper映射文件生成的位置 --> <sqlMapGenerator targetPackage="mappers" targetProject=".\src\main\resources"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper接口生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="mappers" targetProject=".\src\main\java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定数据库表 --> <table schema="" tableName="animal"></table> <table schema="" tableName="cards"></table> <table schema="" tableName="cat"></table> <table schema="" tableName="cities"></table> <table schema="" tableName="dog"></table> <table schema="" tableName="man"></table> <table schema="" tableName="phone"></table> <table schema="" tableName="students"></table> <table schema="" tableName="user"></table> </context> </generatorConfiguration>
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执行类,生成Mapper接口,Mapeer.xml映射文件和POJO类
public class MyBatisGeneratorApp { public void generator() throws Exception{ List<String> warnings = new ArrayList<String>(); boolean overwrite = true; //指定 逆向工程配置文件 File configFile = new File("D:\\javaProjects\\mybatis_generator\\src\\main\\resources\\generatorConfig.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = cp.parseConfiguration(configFile); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } public static void main(String[] args) throws Exception { try { MyBatisGeneratorApp generatorSqlmap = new MyBatisGeneratorApp(); generatorSqlmap.generator(); } catch (Exception e) { e.printStackTrace(); } } }