MyBatis JPA Extra
MyBatis JPA Extra 对 MyBatis 扩展 JPA 功能
1.JPA 2.1 注释简化 CUID 操作 ;
2.Interceptor 实现数据库 SELECT 分页查询 ;
3. 链式 Query 查询条件构造器；
4. 提供 starter, 简化 SpringBoot 集成 ;
1、JPA 2.1 注释
1.1、注释
仅支持 6 个注释
- @Entity
- @Table
- @Column
- @Id
- @GeneratedValue
- @Transient
1.2、主键策略
| 序号 | 策略 | 支持 |
|---|---|---|
| 1 | AUTO | 4 种主键自动填充策略 snowflakeid (雪花 ID - 推荐 uuid(UUID uuid.hex (UUID 十六进制 serial (JPA Extra 序列 |
| 2 | SEQUENCE | 数据库序列生成，generator 值为数据库序列名 |
| 3 | IDENTITY | 数据库表自增主键 |
1.3、Java Bean 注释
@Entity @Table(name = "STUDENTS" public class Students extends JpaBaseEntity implements Serializable{ @Id @Column @GeneratedValue(strategy=GenerationType.AUTO,generator="snowflakeid" //@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="SEQ_MYBATIS_STUD" //@GeneratedValue(strategy=GenerationType.IDENTITY private String id; @Column private String stdNo; @Column private String stdName; @Column private String stdGender; @Column private int stdAge; @Column private String stdMajor; @Column private String stdClass; @Column private byte[] images; public Students( {} //public get({}; public void set({}; }
2、基本操作
2.1、CURD
//新增数据
@Test
public void insert( throws Exception{
_logger.info("insert...";
Students student=new Students(;
student.setStdNo("10024";
student.setStdGender("M";
student.setStdName("司马昭";
student.setStdAge(20;
student.setStdMajor("政治";
student.setStdClass("4";
service.insert(student;
Thread.sleep(1000;
_logger.info("insert id " + student.getId(;
}
//查询数据实体并更新
@Test
public void update( throws Exception{
_logger.info("get...";
Students student=service.get("317d5eda-927c-4871-a916-472a8062df23";
System.out.println("Students "+student;
_logger.info("Students "+student;
_logger.info("update...";
student.setImages(null;
service.update(student;
_logger.info("updateed.";
student.setImages("ssss".getBytes(;
service.update(student;
_logger.info("updateed2.";
}
//根据实体查询并更新
@Test
public void merge( throws Exception{
_logger.info("merge...";
Students student=new Students(;
//student.setId("10024";
student.setStdNo("10024";
student.setStdGender("M";
student.setStdName("司马昭";
student.setStdAge(20;
student.setStdMajor("政治";
student.setStdClass("4";
service.merge(student;
Thread.sleep(1000;
_logger.info("merge id " + student.getId(;
}
//根据ID查询
@Test
public void get( throws Exception{
_logger.info("get...";
Students student=service.get("317d5eda-927c-4871-a916-472a8062df23";
System.out.println("Students "+student;
_logger.info("Students "+student;
}
//根据实体查询
@Test
public void query( throws Exception{
_logger.info("query...";
Students student=new Students(;
student.setStdGender("M";
List<Students> listStudents =service.query(student;
//...
}
//查询所有记录
@Test
public void findAll( throws Exception{
_logger.info("findAll...";
List<Students> listStudents =service.findAll(;
//...
}
//根据ID删除
@Test
public void remove( throws Exception{
_logger.info("remove...";
service.remove("921d3377-937a-4578-b1e2-92fb23b5e512";
}
//根据ID集合批量删除
@Test
public void batchDelete( throws Exception{
_logger.info("batchDelete...";
List<String> idList=new ArrayList<String>(;
idList.add("8584804d-b5ac-45d2-9f91-4dd8e7a090a7";
idList.add("ab7422e9-a91a-4840-9e59-9d911257c918";
idList.add("12b6ceb8-573b-4f01-ad85-cfb24cfa007c";
idList.add("dafd5ba4-d2e3-4656-bd42-178841e610fe";
service.deleteBatch(idList;
}
//根据ID批量逻辑删除
@Test
public void logicDelete( throws Exception{
_logger.info("logicDelete...";
List<String> idList=new ArrayList<String>(;
idList.add("8584804d-b5ac-45d2-9f91-4dd8e7a090a7";
idList.add("ab7422e9-a91a-4840-9e59-9d911257c918";
idList.add("12b6ceb8-573b-4f01-ad85-cfb24cfa007c";
idList.add("dafd5ba4-d2e3-4656-bd42-178841e610fe";
service.logicDelete(idList;
}
//根据ID批量删除
@Test
public void batchDeleteByIds( throws Exception{
_logger.info("batchDeleteByIds...";
service.deleteBatch("2";
service.deleteBatch("2,639178432667713536";
}
2.2、Find 查询和 Qruey 构造器
//springJDBC 的查询方式
@Test
public void find( throws Exception{
_logger.info("find by filter StdNo = '10024' or StdNo = '10004'";
List<Students> listStudents = service.find(" StdNo = ? or StdNo = ? ",
new Object[]{"10024","10004"},
new int[]{Types.VARCHAR,Types.INTEGER}
;
//...
}
//根据链式条件构造器查询
//WHERE (stdMajor = '政治' and STDAGE > 30 and stdMajor in ( '政治' , '化学' or ( stdname = '周瑜' or stdname = '吕蒙'
@Test
public void filterByQuery( throws Exception{
_logger.info("filterByQuery...";
List<Students> listStudents = service.query(
new Query(.eq("stdMajor", "政治".and(.gt("STDAGE", 30.and(.in("stdMajor", new Object[]{"政治","化学"}
.or(new Query(.eq("stdname", "周瑜".or(.eq("stdname", "吕蒙";
//...
}
2.3、分页查询并 count 数据量
//根据实体分页查询
@Test
public void queryPageResults( throws Exception{
_logger.info("queryPageResults...";
Students student=new Students(;
//student.setStdGender("M";
//student.setStdMajor(政治";
student.setPageSize(10;
//student.setPageNumber(2;
student.calculate(21;
JpaPageResults<Students> results = service.queryPageResults(student;
List<Students> rowsStudents = results.getRows(;
long records =results.getRecords(;//当前页记录数量
long totalPage =results.getTotalPage(;//总页数
long total =results.getTotal(;//总数据量
long page =results.getPage(;//当前页
//...
}
//mapper id分页查询
@Test
public void queryPageResultsByMapperId( throws Exception{
_logger.info("queryPageResults by mapperId...";
Students student=new Students(;
student.setStdGender("M";
//student.setStdMajor(政治";
student.setPageSize(10;
student.setPageNumber(2;
JpaPageResults<Students> results =
service.queryPageResults("queryPageResults1",student;
//...
}
3、版本更新
支持jdk 17
支持Spring 6
支持SpringBoot 3
底层代码优化