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
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
