回想一下MyBatis的基本操作,它需要实体类,自定义mapper接口以及mapper.xml配置文件。为了避免繁琐的工作量,MyBatis Generator,简称MBG,可自动生成框架所需的这些依赖,同时支持基本的CRUD操作,但是需要注意,MBG一般不要重复执行,否则会出问题。
下面是引入MBG的基本操作:
一、新建maven项目,引入依赖:
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< dependencies > < dependency > < groupId >org.mybatis</ groupId > < artifactId >mybatis</ artifactId > < version >3.5.5</ version > </ dependency > < dependency > < groupId >mysql</ groupId > < artifactId >mysql-connector-java</ artifactId > < version >8.0.20</ version > </ dependency > < dependency > < groupId >org.mybatis.generator</ groupId > < artifactId >mybatis-generator-core</ artifactId > < version >1.4.0</ version > </ dependency > </ dependencies > |
二、创建mbg配置文件:
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<? 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 = "testMBG" targetRuntime = "MyBatis3" > <!-- 连接池 --> < jdbcConnection driverClass = "com.mysql.cj.jdbc.Driver" connectionURL = "jdbc:mysql://localhost:3306/demo" userId = "root" password = "" ></ jdbcConnection > <!-- 配置JavaBean生成策略 --> < javaModelGenerator targetPackage = "com.wts.entity" targetProject = "./src/main/java" ></ javaModelGenerator > <!-- 配置SQL映射文件生成策略 --> < sqlMapGenerator targetPackage = "com.wts.entity" targetProject = "./src/main/java" ></ sqlMapGenerator > <!-- 配置Mapper接口的生成策略 --> < javaClientGenerator targetPackage = "com.wts.entity" targetProject = "./src/main/java" ></ javaClientGenerator > < table tableName = "user" domainObjectName = "User" ></ table > </ context > </ generatorConfiguration > |
三、运行Generator:
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public class MyTest { public static void main(String[] args) { List<String> warnings = new ArrayList<>(); File configFile = new File(MyTest. class .getResource( "generatorConfig.xml" ).getFile()); ConfigurationParser configurationParser = new ConfigurationParser(warnings); Configuration configuration = null ; try { configuration = configurationParser.parseConfiguration(configFile); } catch (IOException e) { e.printStackTrace(); } catch (XMLParserException e) { e.printStackTrace(); } DefaultShellCallback callback = new DefaultShellCallback( true ); MyBatisGenerator myBatisGenerator = null ; try { myBatisGenerator = new MyBatisGenerator(configuration, callback, warnings); } catch (InvalidConfigurationException e) { e.printStackTrace(); } try { myBatisGenerator.generate( null ); } catch (SQLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } } } |
这都是固定写法,了解一下即可。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/viewts/p/13213865.html