Springboot通用mapper和mybatis-generator程式碼示例
阿新 • • 發佈:2020-12-04
實現功能:根據資料庫中的表,自動生成model、dao和對應的xml檔案。xml中實現通用mapper中CURD功能
1、引入依賴
<properties> <mybatis.generator.version>1.3.7</mybatis.generator.version> <tk.mybatis.version>4.1.5</tk.mybatis.version> </properties> <dependencies> <!--mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.3</version> </dependency> <!--通用mapper--> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper</artifactId> <version>${tk.mybatis.version}</version> </dependency> <!--mybatis-generator--> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>${mybatis.generator.version}</version> </dependency> <!--mysql資料庫--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--druid資料來源--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependencies> <build> <plugins> <!--配置Maven中 mybatis-generator 外掛--> <!--加入tk.mybatis的依賴--> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>${mybatis.generator.version}</version> <configuration> <!--可移動--> <verbose>true</verbose> <!--可覆蓋--> <overwrite>true</overwrite> </configuration> <dependencies> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper</artifactId> <version>${tk.mybatis.version}</version> </dependency> </dependencies> </plugin> </plugins> </build>
2、配置通用mapper
方式1:配置要掃描的mapper
@SpringBootApplication @MapperScan(basePackages = "com.liang.mapper") public class MyappApplication { public static void main(String[] args) { SpringApplication.run(MyappApplication.class,args); } }
方式2:掃描的mapper
@Configuration public class MybatisConfig { @Bean(name = "mapperScannerConfigurer") public MapperScannerConfigurer MapperScannerConfigurer1() { MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer(); mapperScannerConfigurer.setBasePackage("com.liang.mapper"); Properties properties = new Properties(); properties.setProperty("notEmpty","false"); properties.setProperty("IDENTITY","MYSQL"); properties.setProperty("mappers",Mapper.class.getName()); mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory"); mapperScannerConfigurer.setProperties(properties); return mapperScannerConfigurer; } }
3、application.yaml中配置mybatis
#Mybatis(注意不是 mybatis.config-location 這個配置) mybatis: mapper-locations: classpath:mapper/*.xml type-aliases-package: com.liang.pojo configuration-properties: { notEmpty: false,IDENTITY: 'MYSQL',mappers: "tk.mybatis.mapper.common.Mapper" }
4、新增generatorConfig.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> <!-- 資料庫驅動--> <classPathEntry location="E:\ideaMaven\MavenRepository\mysql\mysql-connector-java\8.0.22\mysql-connector-java-8.0.22.jar" /> <context id="DB2Tables" targetRuntime="MyBatis3Simple"> <!--beginningDelimiter和endingDelimiter:指明資料庫的用於標記資料庫物件名的符號,比如ORACLE就是雙引號,MYSQL預設是`反引號; --> <property name="beginningDelimiter" value="`"></property> <property name="endingDelimiter" value="`"></property> <!-- 生成的Java檔案的編碼 --> <property name="javaFileEncoding" value="utf-8"/> <!--新增Tk-mapper外掛--> <plugin type="tk.mybatis.mapper.generator.MapperPlugin" > <property name="mappers" value="tk.mybatis.mapper.common.Mapper"/> </plugin> <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/temp_db?serverTimezone=Asia/Shanghai&characterEncoding=utf-8&useUnicode=true&useSSL=false" userId="root" password="123456"> </jdbcConnection> <!-- java型別處理器 用於處理DB中的型別到Java中的型別,預設使用JavaTypeResolverDefaultImpl; 注意一點,預設會先嚐試使用Integer,Long,Short等來對應DECIMAL和 NUMERIC資料型別; --> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!--生成entity類存放位置--> <javaModelGenerator targetPackage="com.liang.pojo" targetProject="src/main/java"> <property name="enableSubPackages" value="false" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--生成對映檔案存放位置 --> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!--生成Dao類存放位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="com.liang.mapper" targetProject="src/main/java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--要生成的Table,注意不同的資料庫,sqlStatement--> <!--sqlStatement 不同的資料庫配置 http://mybatis.org/generator/configreference/generatedKey.html--> <table domainObjectName="School2" tableName="t_school"> <!--<generatedKey column="id" sqlStatement="MySql" identity="true" />--> <generatedKey column="id" sqlStatement="SELECT LAST_INSERT_ID() AS id" identity="true" /> </table> </context> </generatorConfiguration>
5、完成
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