文章目录

• • 1.整合MyBatis-Plus
  • • 1.1.添加POM引用
    • 1.2.更新配置
    • 1.3.实体类
    • 1.4.mapper
    • 1.5.Service
    • 1.6.分页插件
  • 2.代码生成工具

1.整合MyBatis-Plus

1.1.添加POM引用

<!--导入MyBatis的场景启动器-->
<!--<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.0</version>
</dependency>-->

<!--MyBatis Plus启动器-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.2.0</version>
</dependency>

<!-- mybatis plus 代码生成器 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.2.0</version>
</dependency>

<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.28</version>
</dependency>

1.2.更新配置

# mybatis配置
#mybatis:
  # 指定Mapper.xml位置
  #mapper-locations: classpath:mapper/*.xml
  # 给实体类取别名
  #type-aliases-package: com.easyshop.pojo

mybatis-plus:
  configuration:
    map-underscore-to-camel-case: true
    auto-mapping-behavior: full
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath*:mapper/*.xml
  global-config:
    # 逻辑删除配置
    db-config:
      # 删除前
      logic-not-delete-value: 1
      # 删除后
      logic-delete-value: 0
  type-aliases-package: com.easyshop.pojo

1.3.实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_content_category")
public class ContentCategory {

    @TableId(value = "id",type= IdType.AUTO)
    private Long id;

    private String name;
    private Long del;
}

1.4.mapper

public interface ContentCategoryMapper extends BaseMapper<ContentCategory> {

    ContentCategory findById(Long id);

}

1.5.Service

public interface ContentCategoryService extends IService<ContentCategory> {

    ContentCategory findById(Long id);
}

@Service
public class ContentCategoryServiceImpl extends ServiceImpl<ContentCategoryMapper, ContentCategory> implements ContentCategoryService {

    @Autowired
    ContentCategoryMapper contentCategoryMapper;

    public ContentCategory findById(Long id) {
        return contentCategoryMapper.findById(id);
    }
}

1.6.分页插件

/**
 * 配置分页插件
 *
 */
@Configuration
public class MybatisPlusConfig {

    /**
     * 分页插件
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
}

@Test
public void test4(){
    QueryWrapper<Employee> qw = new QueryWrapper<Employee>();
    qw.between("age",10,50);

    IPage<Employee> pager = em.selectPage(new Page<Employee>(1, 2), qw);
    List<Employee> emps = pager.getRecords();
    for (Employee emp : emps) {
        System.out.println(emp);
    }
    long pages = pager.getPages();
    System.out.println("总页数是:"+pages);

    long total = pager.getTotal();
    System.out.println("总条数是:"+total);
}

2.代码生成工具

package com.easyshop.test;

import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.util.Scanner;

/**
 * 自动生成mybatisplus的相关代码
 */
public class GeneratorCodeConfig {

    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("请输入" + tip + "：");
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotEmpty(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "！");
    }

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir"); // D:\project2021\EasyShop\
        System.out.println(projectPath);
        gc.setOutputDir(projectPath + "/advertisement-service/src/main/java");
        gc.setAuthor("bruce");
        gc.setOpen(false);
        //实体属性 Swagger2 注解
        gc.setSwagger2(false);
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        //dsc.setUrl("jdbc:mysql://127.0.0.1:3306/easyshop_advertisement?useUnicode=true&characterEncoding=utf-8");
        dsc.setUrl("jdbc:mysql://127.0.0.1:3306/easyshop_advertisement?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("123456");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
//        pc.setModuleName(scanner("模块名"));
        pc.setParent("com.easyshop");
        pc.setEntity("pojo");
        pc.setMapper("mapper");
        pc.setService("service");
        pc.setServiceImpl("service.impl");
        mpg.setPackageInfo(pc);


        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();

        // 配置自定义输出模板
        //指定自定义模板路径，注意不要带上.ftl/.vm, 会根据使用的模板引擎自动识别
        // templateConfig.setEntity("templates/entity2.java");
        // templateConfig.setService();
        // templateConfig.setController();

        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);

        strategy.setInclude(scanner("表名，多个英文逗号分割").split(","));
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix(pc.getModuleName() + "_");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}