【MyBatisPlus】代码生成器、条件分页查询

代码生成器

第一步引入依赖

  <!--        mybatisPlus的代码生成器--><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><version>3.3.1</version></dependency>

第二步创建使用类
具体配置内容见代码注释

public class CodeGet {public static void main(String[] args) {// 1、创建代码生成器AutoGenerator mpg = new AutoGenerator();// 2、全局配置// 全局配置GlobalConfig gc = new GlobalConfig();String projectPath = System.getProperty("user.dir");//输出路径gc.setOutputDir("D:\\project\\myglkt_parent\\service\\service_user"+"/src/main/java");gc.setServiceName("%sService");        //去掉Service接口的首字母I//代码作者gc.setAuthor("zys");//生成代码后是否打开gc.setOpen(true);mpg.setGlobalConfig(gc);// 3、数据源配置DataSourceConfig dsc = new DataSourceConfig();dsc.setUrl("jdbc:mysql://localhost:3306/glkt_user?useSSL=false");dsc.setDriverName("com.mysql.jdbc.Driver");dsc.setUsername("root");dsc.setPassword("123");dsc.setDbType(DbType.MYSQL);mpg.setDataSource(dsc);// 4、包配置PackageConfig pc = new PackageConfig();// com.atguigu.ggkt.vod.pc.setModuleName("vod"); //模块名pc.setParent("com.example.ggkt");pc.setController("controller");pc.setService("service");pc.setMapper("mapper");mpg.setPackageInfo(pc);// 5、策略配置StrategyConfig strategy = new StrategyConfig();//数据库表名strategy.setInclude("user_info","user_login_log");strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作strategy.setRestControllerStyle(true); //restful api风格控制器strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符mpg.setStrategy(strategy);// 6、执行mpg.execute();}
}

条件分页查询

第一步载入配置类

/*** 配置类*/
@Configuration
@MapperScan("com.example.ggkt.order.mapper")
public class OrderConfig {/*** 分页插件*/@Beanpublic PaginationInterceptor paginationInterceptor() {return new PaginationInterceptor();}
}

第二步使用

controller中：

//条件查询分页列表
@ApiOperation(value = "获取分页列表")
@PostMapping("{page}/{limit}")
public Result index(@ApiParam(name = "page", value = "当前页码", required = true)@PathVariable Long page,@ApiParam(name = "limit", value = "每页记录数", required = true)@PathVariable Long limit,@ApiParam(name = "teacherVo", value = "查询对象", required = false)@RequestBody(required = false) TeacherQueryVo teacherQueryVo) {//创建page对象，传递当前页和每页记录数Page<Teacher> pageParam = new Page<>(page, limit);//获取条件值String name = teacherQueryVo.getName();//讲师名称Integer level = teacherQueryVo.getLevel();//讲师级别String joinDateBegin = teacherQueryVo.getJoinDateBegin();//开始时间String joinDateEnd = teacherQueryVo.getJoinDateEnd();//结束时间//封装条件QueryWrapper<Teacher> wrapper = new QueryWrapper<>();if(!StringUtils.isEmpty(name)) {wrapper.like("name",name);}if(!StringUtils.isEmpty(level)) {wrapper.eq("level",level);}if(!StringUtils.isEmpty(joinDateBegin)) {wrapper.ge("join_date",joinDateBegin);}if(!StringUtils.isEmpty(joinDateEnd)) {wrapper.le("join_date",joinDateEnd);}//调用方法得到分页查询结果IPage<Teacher> pageModel = teacherService.page(pageParam, wrapper);return Result.ok(pageModel);
}