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
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-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
代码语言：javascript复制@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
代码语言：javascript复制 //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
代码语言：javascript复制 //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
代码语言：javascript复制 //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、mapper配置
代码语言：javascript复制<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="queryPageResults" parameterType="Students" resultType="Students">
SELECT
ID ,
STDNO ,
STDNAME ,
STDGENDER ,
STDAGE ,
STDMAJOR ,
STDCLASS
FROM STUDENTS
<include refid="sql_condition"/>
</select>
<select id="queryPageResults1" 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>4、SpringBoot配置
代码语言：javascript复制#
spring.datasource.username=root
spring.datasource.password=maxkey
spring.datasource.url=jdbc:mysql://localhost/test?autoReconnect=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
mybatis.dialect=mysql
mybatis.type-aliases-package=org.apache.mybatis.jpa.test.entity
mybatis.mapper-locations=classpath*:/org/apache/mybatis/jpa/test/dao/persistence/xml/${mybatis.dialect}/*.xml
mybatis.table-column-escape=true
mybatis.table-column-snowflake-datacenter-id=1
mybatis.table-column-snowflake-machine-id=1
#mybatis.table-column-escape-char=`5、相关资源
MyBatis网站
MyBatis GitHub源码
MaxKey单点登录认证系统 GitHub源码
MaxKey单点登录认证系统 Gitee源码
