README.md
MyBatis JPA Extra
MyBatis JPA Extra对MyBatis扩展JPA功能
1.基于JPA 2.1的注释简化CUID操作;
2.用Interceptor实现数据库SELECT分页查询;
3.提供mybatis-jpa-extra-spring-boot-starter,简化SpringBoot集成;
1、JavaBean注释简单
仅有6个注释
- @Entity
- @table
- @Column
- @Id
- @GeneratedValue
- @Transient
@GeneratedValue有4中策略
-
AUTO
snowflakeid
uuid
uuid.hex
serial
-
SEQUENCE
generator值为数据库序列名
-
IDENTITY
generator无,根据数据库自动生成方式
package org.apache.mybatis.jpa.test.entity;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import org.apache.mybatis.jpa.persistence.JpaBaseEntity;
@Entity
@Table(name = "STUDENTS")
public class Students extends JpaBaseEntity implements Serializable{
private static final long serialVersionUID = -6928570405840778151L;
@Id
@Column
@GeneratedValue(strategy=GenerationType.AUTO,generator="snowflakeid")
//@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="SEQ_MYBATIS_STUD")
//@GeneratedValue(strategy=GenerationType.IDENTITY,generator="SEQ_MYBATIS_STUD")
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() {
super();
}
public get(){};
public void set(){};
//...
}
2、单表新增、修改、删除、查询、分页查询
package org.apache.mybatis.jpa.test;
import java.sql.Types;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.mybatis.jpa.test.dao.service.StudentsService;
import org.apache.mybatis.jpa.test.entity.Students;
import org.apache.mybatis.jpa.util.WebContext;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyBatisTestRunner {
private static final Logger _logger = LoggerFactory.getLogger(MyBatisTestRunner.class);
public static ApplicationContext context;
public static StudentsService service;
@Test
public void insert() throws Exception{
_logger.info("insert...");
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.insert(student);
Thread.sleep(1000);
_logger.info("insert id " + student.getId());
//service.remove(student.getId());
}
@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("insert id " + student.getId());
}
@Test
public void find() throws Exception{
_logger.info("find...");
_logger.info("find by filter "
+ service.find(" StdNo = '10024' or StdNo = '10004'")
);
_logger.info("find by filter with args "
+ service.find(
" StdNo = ? or StdNo = ? ",
new Object[]{"10024","10004"},
new int[]{Types.VARCHAR,Types.INTEGER}
)
);
}
@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);
}
@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.");
}
@Test
public void remove() throws Exception{
_logger.info("remove...");
Students student=new Students();
student.setId("921d3377-937a-4578-b1e2-92fb23b5e512");
service.remove(student.getId());
}
@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);
}
@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);
}
@Test
public void batchDeleteByIds() throws Exception{
_logger.info("batchDeleteByIds...");
service.deleteBatch("2");
service.deleteBatch("2,639178432667713536");
}
@Test
public void queryPageResults() throws Exception{
_logger.info("queryPageResults...");
Students student=new Students();
//student.setId("af04d610-6092-481e-9558-30bd63ef783c");
//student.setStdGender("M");
//student.setStdMajor(政治");
student.setPageSize(10);
//student.setPageNumber(2);
student.calculate(21);
List<Students> allListStudents =
service.queryPageResults(student).getRows();
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
@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);
List<Students> allListStudents =
service.queryPageResults("queryPageResults1",student).getRows();
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
@Test
public void query() throws Exception{
_logger.info("findAll...");
List<Students> allListStudents =service.query(null);
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
@Test
public void findAll() throws Exception{
_logger.info("findAll...");
List<Students> allListStudents =service.findAll();
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
@Before
public void initSpringContext(){
if(context!=null) return;
_logger.info("init Spring Context...");
SimpleDateFormat sdf_ymdhms =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String startTime=sdf_ymdhms.format(new Date());
try{
MyBatisTestRunner runner=new MyBatisTestRunner();
runner.init();
}catch(Exception e){
e.printStackTrace();
}
_logger.info("-- --Init Start at " + startTime+" , End at "+sdf_ymdhms.format(new Date()));
}
//Initialization ApplicationContext for Project
public void init(){
_logger.info("Application dir "+System.getProperty("user.dir"));
context = new ClassPathXmlApplicationContext(new String[] {"spring/applicationContext.xml"});
WebContext.applicationContext=context;
service =(StudentsService)WebContext.getBean("studentsService");
}
}
3、映射文件配置
<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="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
#
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=`