时间:2022-11-04 09:53:50 | 栏目:JAVA代码 | 点击:次
与Mybatis-Plus类似,是对Mybaits进一步的封装,使之语法简洁明了,更重要的是不需要在自主创建Xml文件,可以只用一个实体类对象,通过代码生成器,在编译的过程中生成所需要的各类文件,简化了项目的基础构建,提高开发效率。
1、创建数据库测试表
DROP TABLE IF EXISTS `t_user`; create table `t_user` ( id bigint auto_increment comment '主键ID' primary key, name varchar(30) charset utf8 null comment '姓名', age int null comment '年龄', email varchar(50) charset utf8 null comment '邮箱', gmt_create datetime null comment '记录创建时间', gmt_modified datetime null comment '记录最后修改时间', is_deleted tinyint(2) default 0 null comment '逻辑删除标识' );
2、创建一个Springboot项目,pom文件如下
<?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>2.3.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.mybatis.fluent</groupId> <artifactId>fluent_mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <name>fluent_mybatis</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <fluent.mybatis.version>1.5.6</fluent.mybatis.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!--JDBC驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--Mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.1</version> </dependency> <!-- fluent mybatis依赖--> <dependency> <groupId>com.github.atool</groupId> <artifactId>fluent-mybatis</artifactId> <version>${fluent.mybatis.version}</version> </dependency> <dependency> <groupId>com.github.atool</groupId> <artifactId>fluent-mybatis-processor</artifactId> <version>${fluent.mybatis.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </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> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
3、代码生成器
import cn.org.atool.generator.FileGenerator; import cn.org.atool.generator.annotation.Table; import cn.org.atool.generator.annotation.Tables; public class AppEntityGenerator { public static void main(String[] args) { FileGenerator.build(Abc.class); } @Tables( /** 数据库连接信息 **/ url = "jdbc:mysql://IP:3306/test?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai", username = "XXXXXX", password = "XXXXXX", /** Entity类parent package路径 **/ basePack = "com.mybatis.fluent.fluent_mybatis", /** Entity代码源目录 **/ srcDir = "/src/main/java", /** Dao代码源目录 **/ daoDir = "/src/main/java", /** 如果表定义记录创建,记录修改,逻辑删除字段 **/ gmtCreated = "gmt_create", gmtModified = "gmt_modified", logicDeleted = "is_deleted", /** 需要生成文件的表 **/ tables = @Table(value = {"t_user"}) ) static class Abc { } }
需要注意,默认的是MySQL数据库,如果需要其他数据库,需要手动配置dbType和driver,其他选项按照需要修改。例如oralce
import cn.org.atool.generator.FileGenerator; import cn.org.atool.generator.annotation.Table; import cn.org.atool.generator.annotation.Tables; import cn.org.atool.generator.database.DbType; public class AppEntityGenerator { public static void main(String[] args) { FileGenerator.build(Abc.class); } @Tables( /** 数据库连接信息 **/ dbType= DbType.ORACLE, driver= "oracle.jdbc.OracleDriver", url = "jdbc:oracle:thin:@IP:1521:orcl", username = "XXXXXX", password = "XXXXXX", /** Entity类parent package路径 **/ basePack = "com.mybatis.fluent.fluent_mybatis", /** Entity代码源目录 **/ srcDir = "/src/main/java", /** Dao代码源目录 **/ daoDir = "/src/main/java", /** 如果表定义记录创建,记录修改,逻辑删除字段 **/ gmtCreated = "INSERT_DATE_TIME", /** 需要生成文件的表 **/ tables = @Table(value = {"table_name"}) ) static class Abc { } }
main方法启动执行,生成的项目结构,如果在执行是出现异常
需要暂时注释
当生成好对应文件,项目目录如下
此时TUserDaoImpl会有错误
此时将需要将之前注释的provided打开,在执行
执行过后,异常消除。此时你就拥有的对数据库此表的强大操作能力。
4、测试CURD
import cn.org.atool.fluent.mybatis.model.IPagedList; import cn.org.atool.fluent.mybatis.model.StdPagedList; import com.mybatis.fluent.fluent_mybatis.dao.impl.HospitalinfoDaoImpl; import com.mybatis.fluent.fluent_mybatis.dao.impl.TUserDaoImpl; import com.mybatis.fluent.fluent_mybatis.entity.HospitalinfoEntity; import com.mybatis.fluent.fluent_mybatis.entity.TUserEntity; import com.mybatis.fluent.fluent_mybatis.helper.TUserWrapperHelper; import com.mybatis.fluent.fluent_mybatis.wrapper.HospitalinfoQuery; import com.mybatis.fluent.fluent_mybatis.wrapper.TUserQuery; import org.junit.jupiter.api.Test; import org.springframework.boot.test.context.SpringBootTest; import javax.annotation.Resource; import java.io.Serializable; import java.util.List; @SpringBootTest class FluentMybatisApplicationTests { @Resource private TUserDaoImpl dao; @Test void add() { TUserEntity entity = new TUserEntity().setAge(20).setEmail("122@163.com").setName("lisi").setIsDeleted(false); Serializable id = dao.save(entity); System.out.println("插入后返回的主键ID为:" + id); } @Test void select(){ /** * 分页查询构造条件 */ TUserQuery query = TUserQuery.query().limit(0,1); List<TUserEntity> list = dao.listEntity(query); System.out.println(list); } @Test void upData(){ TUserEntity entity = dao.selectById(1L); System.out.println(entity); entity.setAge(2000).setEmail("120098922@qq.com").setName("lisi111").setIsDeleted(true); System.out.println(entity); boolean b = dao.updateById(entity); System.out.println(b); } @Test void delete(){ boolean b = dao.deleteById(1L); System.out.println(b); TUserQuery query = TUserQuery.query(); List<TUserEntity> list = dao.listEntity(query); System.out.println(list); } }
官方网站提供了完整切详细的构建和使用的文档,本文的内容仅为学习练习的Demo