MyBatis JPA Extra
MyBatis JPA Extra对MyBatis扩展JPA功能
1.Jakarta JPA 3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 3注释
1.1、注释
- @Entity
- @Table
- @Column
- @Id
- @GeneratedValue
- @Transient
- @Temporal
- @PartitionKey
- @ColumnDefault
- @ColumnLogic
1.2、主键策略
支持3种主键策略
| 序号 | 策略 | 支持 |
|---|---|---|
| 1 | AUTO | 4种主键自动填充策略 snowflakeid(雪花ID-默认) 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 JpaEntity implements Serializable{ @Id @Column @GeneratedValue private String id; @Column private String stdNo; @Column private String stdName; @Column @ColumnDefault("'M'") private String stdGender; @Column private int stdAge; @Column private String stdMajor; @Column private String stdClass; @Column private byte[] images; @Column(insertable = false) @GeneratedValue @Temporal(TemporalType.TIMESTAMP) private LocalDateTime modifyDate; @ColumnLogic @Column(name ="is_deleted") private int isDeleted; //getter setter } 2、基本操作
2.1、CURD
//新增数据 @Test void insert() throws Exception{ 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); } //查询数据实体并更新 @Test void update() throws Exception{ Students student = service.get("317d5eda-927c-4871-a916-472a8062df23"); student.setStdMajor("政治"); service.update(student); } //根据实体查询并更新 @Test void merge() throws Exception{ Students student = new Students(); student.setStdMajor("政治"); student.setStdClass("4"); service.merge(student); } //根据ID查询 @Test void get() throws Exception{ Students student = service.get("317d5eda-927c-4871-a916-472a8062df23"); } //根据实体查询 @Test void query() throws Exception{ Students student = new Students(); student.setStdGender("M"); List<Students> listStudents = service.query(student); } //查询所有记录 @Test void findAll() throws Exception{ List<Students> listStudents = service.findAll(); } //根据ID删除 @Test void remove() throws Exception{ service.remove("921d3377-937a-4578-b1e2-92fb23b5e512"); } //根据ID集合批量删除 @Test void batchDelete() throws Exception{ List<String> idList = new ArrayList<String>(); idList.add("8584804d-b5ac-45d2-9f91-4dd8e7a090a7"); idList.add("ab7422e9-a91a-4840-9e59-9d911257c918"); //... service.deleteBatch(idList); } //根据ID批量删除 @Test void batchDeleteByIds() throws Exception{ service.deleteBatch("2"); service.deleteBatch("2,639178432667713536"); } 2.2、逻辑删除
//根据ID删除或者ID字符串分隔符,批量逻辑删除 @Test void logicDelete() throws Exception{ service.logicDelete("2"); service.logicDelete("2,639178432667713536"); } //根据IDS批量逻辑删除 @Test void logicBatchDelete() throws Exception{ List<String> idList=new ArrayList<String>(); idList.add("8584804d-b5ac-45d2-9f91-4dd8e7a090a7"); idList.add("ab7422e9-a91a-4840-9e59-9d911257c918"); //... service.logicDelete(idList); } //根据IDS字符串和分割符批量逻辑删除 @Test void logicDeleteSplit() throws Exception{ service.logicDeleteSplit("2,639178432667713536",","); } 2.3、Find查询和Qruey构造器
//SpringJDBC的查询方式 where StdNo = '10024' or StdNo = '10004' @Test void find() throws Exception{ 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 void queryByCondition() throws Exception{ 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"))); } 2.4、单表分页查询
//根据实体分页查询 @Test void fetch() throws Exception{ JpaPage page = new JpaPage(); page.setPageSize(20); page.setPageable(true); Students student = new Students(); student.setStdGender("M"); JpaPageResults<Students> results = service.fetch(page,student); } //根据Query条件分页查询 where stdMajor = '政治' and STDAGE > 30 @Test void fetchByCondition() throws Exception{ JpaPage page = new JpaPage(); page.setPageSize(20); page.setPageable(true); Query condition = new Query().eq("stdMajor", "政治").and().gt("STDAGE", 30); JpaPageResults<Students> results = service.fetch(page,condition); } 2.5、根据mapper的xml分页查询
//根据Mapper xml配置fetchPageResults分页查询 @Test void fetchPageResults() throws Exception{ Students student=new Students(); student.setStdGender("M"); student.setPageSize(10); student.calculate(21); JpaPageResults<Students> results = service.fetchPageResults(student); } //根据Mapper xml id分页查询,fetchPageResults1在mapper的xml中配置 @Test void fetchPageResultsByMapperId() throws Exception{ Students student=new Students(); student.setStdGender("M"); student.setPageSize(10); student.setPageNumber(2); JpaPageResults<Students> results = service.fetchPageResults("fetchPageResults1",student); } 3、mapper配置
<mapper namespace="org.apache.mybatis.jpa.test.dao.persistence.StudentsMapper" > <sql id="sql_condition"> WHERE 1 = 1 <if test="id != null"> AND ID = '${id}' </if> <if test="stdName != null and stdName != '' "> AND STDNAME like '%${stdName}%' </if> <if test="stdGender != null and stdGender != '' "> AND STDGENDER = #{stdGender} </if> <if test="stdMajor != null"> <![CDATA[AND STDMAJOR = #{stdMajor}]]> </if> </sql> <select id="fetchPageResults" parameterType="Students" resultType="Students"> SELECT ID , STDNO , STDNAME , STDGENDER , STDAGE , STDMAJOR , STDCLASS FROM STUDENTS <include refid="sql_condition"/> </select> <select id="fetchPageResults1" parameterType="Students" resultType="Students"> SELECT ID , STDNO , STDNAME , STDGENDER , STDAGE , STDMAJOR , STDCLASS FROM STUDENTS <include refid="sql_condition"/> </select> <select id="queryBy" parameterType="Students" resultType="Students"> SELECT ID , STDNO , STDNAME , STDGENDER , STDAGE , STDMAJOR , STDCLASS FROM ROLES <include refid="sql_condition"/> </select> <delete id="delete" parameterType="Students" > DELETE FROM STUDENTS WHERE ID=#{id} </delete> 1、新增注解
@ Temporal
@ PartitionKey
@ ColumnDefault
@ ColumnLogic
2、@ GeneratedValue默认生成雪花id
3、增加逻辑删除的功能
4、新增单表分页查询fetch方法，支持条件Query和实体两种参数
5、queryPageResults改为fetchPageResults
6、增加多租户分布注解@PartitionKey
7、分页查询优化
8、代码调整和优化
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