MyBatis JPA Extra
MyBatis JPA Extra对MyBatis进行了JPA扩展，旨在基于JPA 2.1的注释简化对单表CUID操作，根据JPA注释动态生成SQL语句；使用Interceptor实现数据库SELECT分页查询，适配多种数据库；另外提供mybatis-jpa-extra-spring-boot-starter简化SpringBoot集成。
相关资源
MyBatis网站
MyBatis GitHub源码
1、JavaBean注释简单
只支持6个注释
- @Entity
- @Table
- @Column
- @Id
- @GeneratedValue
- @Transient
@GeneratedValue有3中策略
-
AUTO
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.domain;
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.JpaBaseDomain;
/*
ID varchar(40) not null,
NAME varchar(60) not null,
STATUS char(1) null,
CREATEBY varchar(40) null,
CREATEDATE date null,
UPDATEBY varchar(40) null,
UPDATEDATE date null,
constraint PK_ROLES primary key clustered (ID)
*/
/**
* @author Crystal.Sea
*
*/
@Entity
@Table(name = "STUDENTS")
public class Students extends JpaBaseDomain implements Serializable{
/**
*
*/
private static final long serialVersionUID = -6928570405840778151L;
@Id
@Column
@GeneratedValue(strategy=GenerationType.AUTO,generator="serial")
//@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;
public Students() {
super();
}
public String getStdNo() {
return stdNo;
}
public void setStdNo(String stdNo) {
this.stdNo = stdNo;
}
public String getStdName() {
return stdName;
}
public void setStdName(String stdName) {
this.stdName = stdName;
}
public String getStdGender() {
return stdGender;
}
public void setStdGender(String stdGender) {
this.stdGender = stdGender;
}
public int getStdAge() {
return stdAge;
}
public void setStdAge(int stdAge) {
this.stdAge = stdAge;
}
public String getStdMajor() {
return stdMajor;
}
public void setStdMajor(String stdMajor) {
this.stdMajor = stdMajor;
}
public String getStdClass() {
return stdClass;
}
public void setStdClass(String stdClass) {
this.stdClass = stdClass;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Override
public String toString() {
return "Students [stdNo=" + stdNo + ", stdName=" + stdName + ", stdgender=" + stdGender + ", stdAge=" + stdAge
+ ", stdMajor=" + stdMajor + ", stdClass=" + stdClass + "]";
}
}
2、单表新增、修改、删除、查询
package org.apache.mybatis.jpa.test;
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.domain.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.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);
service.remove(student.getId());
}
@Test
public void get() throws Exception{
_logger.info("get...");
Students student=service.get("921d3377-937a-4578-b1e2-92fb23b5e512");
_logger.info("Students "+student);
}
@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.batchDelete(idList);
}
@Test
public void findAll() throws Exception{
_logger.info("findAll...");
_logger.info("findAll "+service.findAll());
}
@Before
public void initSpringContext(){
if(context!=null) return;
_logger.info("init Spring Context...");
SimpleDateFormat sdf_ymdhms =new SimpleDateFormat("yyyy-MM-dd HH🇲🇲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("init ...");
context = new ClassPathXmlApplicationContext(new String[] {"spring/applicationContext.xml"});
WebContext.applicationContext=context;
service =(StudentsService)WebContext.getBean("studentsService");
}
}
3、支持分页查询
package org.apache.mybatis.jpa.test;
import java.util.ArrayList;
import java.util.List;
import org.apache.mybatis.jpa.test.dao.service.StudentsService;
import org.apache.mybatis.jpa.test.domain.Students;
import org.apache.mybatis.jpa.util.WebContext;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = MybatisJpaApplication.class)
public class MybatisJpaApplicationTest{
private static final Logger _logger = LoggerFactory.getLogger(MybatisJpaApplicationTest.class);
@Autowired
StudentsService studentsService;
@Autowired
org.apache.ibatis.session.SqlSessionFactory SqlSessionFactory;
@Autowired
private ApplicationContext applicationContext;
@Before
public void before() {
_logger.info("---------------- before");
WebContext.applicationContext=applicationContext;
}
@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");
studentsService.insert(student);
Thread.sleep(1000);
studentsService.remove(student.getId());
}
@Test
public void get() throws Exception{
_logger.info("get...");
Students student=studentsService.get("921d3377-937a-4578-b1e2-92fb23b5e512");
System.out.println("Students "+student);
_logger.info("Students "+student);
}
@Test
public void remove() throws Exception{
_logger.info("remove...");
Students student=new Students();
student.setId("921d3377-937a-4578-b1e2-92fb23b5e512");
studentsService.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");
studentsService.batchDelete(idList);
}
@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);
List<Students> allListStudents =
studentsService.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 =
studentsService.queryPageResults("queryPageResults1",student).getRows();
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
@Test
public void findAll() {
_logger.info("---------------- ALL");
List<Students> allListStudents=studentsService.findAll();
for (Students s : allListStudents) {
_logger.info("Students "+s);
}
}
}
package org.apache.mybatis.jpa.test;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
@Configuration
public class MybatisJpaConfig {
private int port;
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSource dataSource() {
return DruidDataSourceBuilder.create().build();
}
}
4、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>
5、SpringBoot配置
spring.main.web-application-type=NONE
#
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.type-aliases-package=org.apache.mybatis.jpa.test.domain
mybatis.mapper-locations=classpath*:/org/apache/mybatis/jpa/test/dao/persistence/xml/mysql/*.xml
mybatis.table-column-escape=true
#mybatis.table-column-escape-char=`
