SqlBean 1.6.1 发布，Mybatis 自动建表、维护表结构

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Sqlbean

介绍

Sqlbean是一款通过Java语法生成SQL语句的ORM插件，其理念是弱化在开发阶段对数据库的操作，无需先建表再开发，可直接编写实体类和业务代码，项目启动后自动创建表和维护表结构。内置大量常用方法，支持灵活的条件查询，无DAO层，在项目中几乎不需要编写SQL语句，帮助你快速进行业务功能开发，除了支持Mybatis也同时支持Spring Jdbc。

🚀特点: 多数据源, 动态Schema, 读写分离, 自动建表, 自动维护表结构, 联表查询, 乐观锁, 分页

💻环境: JDK8+, Mybatis3.2.4+, (Spring MVC 4.1.2+, Spring Boot 1.x, Spring Boot 2.x)

💿数据库: Mysql, MariaDB, Oracle, Sqlserver2008+, Postgresql, DB2, Derby, Sqlite, HSQL, H2

Sqlbean For Android请移步这里👉 gitee(推荐)、 github

简单上手

1.引入Maven依赖

 <dependency> 	<groupId>cn.vonce</groupId> 	<artifactId>vonce-sqlbean-spring</artifactId> 	<version>1.6.1</version> </dependency>

2.标注实体类

 @SqlTable("d_user") public class User {     @SqlId(type = IdType.SNOWFLAKE_ID_16)     private Long id;     private String name;     private Integer age;     private Integer stature;     private Integer gender;     private String phone;     private Date createTime;     /**省略get set方法*/ }

3.无需Dao层，Service层接口只需继承SqlBeanService<实体类, id类型>

 public interface UserService extends SqlBeanService<User, Long> {     //这里可以写自己封装的方法  }

4.Service实现类只需继承MybatisSqlBeanServiceImpl<实体类, id类型>和实现你的Service接口

 //使用Spring Jdbc的话将继承的父类改成SpringJdbcSqlBeanServiceImpl即可 @Service public class UserServiceImpl extends MybatisSqlBeanServiceImpl<User, Long> implements UserService {  }

5.Controller层

 @RequestMapping("user") @RestController public class UserController {      @Autowired     private UserService userService;      //查询     @GetMapping("select")     public RS select() {         //查询列表         List<User> list = userService.select();         list = userService.selectBy(Wrapper.where(Cond.gt(User::getId, 10)).and(Cond.lt(User::getId, 20)));         //指定查询         list = userService.select(new Select().column(User::getId, User::getName, User::getPhone).where().gt(User::getId, 10));          //查询一条         User user = userService.selectById(1);         user = userService.selectOneBy(Wrapper.where(eq(User::getId, 1001)));          //sql语义化查询《20岁且是女性的用户根据创建时间倒序，获取前10条》         list = userService.select(new Select().column(User::getId, User::getName, User::getPhone).where().eq(User::getAge, 22).and().eq(User::getGender, 0).back().orderByDesc(User::getCreateTime).page(0, 10));          //联表查询《20岁且是女性的用户根据创建时间倒序，查询前10条用户的信息和地址》         Select select = new Select();         select.column(User::getId, User::getName, User::getPhone, UserAddress::getProvince, UserAddress::getCity, UserAddress::getArea, UserAddress::getDetails);         select.innerJoin(UserAddress.class).on().eq(UserAddress::getId, User::getId);         select.where().gt(User::getAge, 22).and().eq(User::getGender, 0);         select.orderByDesc(User::getCreateTime);         select.page(0, 10);          //查询Map         Map<String, Object> map = userService.selectMap(select);         List<Map<String, Object>> mapList = userService.selectMapList(select);          return super.successHint("获取成功", list);     }      //分页     @GetMapping("getList")     public Map getList(HttpServletRequest request) {         // 查询对象         Select select = new Select();         ReqPageHelper<User> pageHelper = new ReqPageHelper<>(request);         pageHelper.paging(select, userService);         return pageHelper.toResult("获取列表成功");     }      //更新     @PostMapping("update")     public RS update(User user) {         //根据bean内部id更新         long i = userService.updateByBeanId(user);         //根据条件更新         //i = userService.updateBy(Wrapper.where(Cond.gt(User::getAge, 22)).and(Cond.eq(User::getGender, 1)));         //指定更新某个字段 UPDATE user SET gender = 1, name = 'Jovi' ,age = age + 1 WHERE = id = 111         userService.update(new Update<User>().set(User::getGender, 1).set(User::getName, "Jovi").setAdd(User::getAge, User::getAge, 1).where().eq(User::getId, 111).back());         if (i > 0) {             return super.successHint("更新成功");         }         return super.othersHint("更新失败");     }      //删除     @PostMapping("deleteById")     public RS deleteById(Integer[] id) {         //根据id删除         long i = userService.deleteById(id);         //根据条件删除         //i = userService.deleteBy(Wrapper.where(gt(User::getAge, 22)).and(eq(User::getGender, 1)));         if (i > 0) {             return super.successHint("删除成功");         }         return super.othersHint("删除失败");     }      //插入     @PostMapping("add")     public RS add() {         List<User> userList = new ArrayList<>();         for (int i = 0; i < 100; i++) {             User user = new User(i, "name" + i);             userList.add(user);         }         userService.insert(userList);         return successHint("成功");     }  }