README.md

    MyBatis JPA Extra

    MyBatis JPA Extra对MyBatis进行了扩展,目的在于简化开发的难度,采用了JPA 2.1的注释,无需配置映射的XML文件,使用插件的方式动态生成SQL语句,实现对单表的操作的简化;另外使用Interceptor拦截需要分页的SELECT查询语句,根据不同的数据库完成分页查询。

    相关资源

    MyBatis网站

    MyBatis GitHub源码

    作者Blog

    1、JavaBean注释简单

    只支持4个注释

    • @table
    • @Id
    • @Column
    • @GeneratedValue

    @GeneratedValue有3中策略

    1. AUTO

      uuid

      uuid.hex

      serial

    2. SEQUENCE

      generator值为数据库序列名

    3. 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.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
     *
     */
    @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: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("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.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;
    
    	@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.setPageResults(10);
    		 student.setPage(2);
    		 _logger.info("queryPageResults "+service.queryPageResults(student));
    	}
    	
    	@Test
    	public void queryPageResultsByMapperId() throws Exception{
    		_logger.info("queryPageResults by mapperId...");
    		 Students student=new Students();
    		 student.setStdGender("M");
    		 //student.setStdMajor(政治");
    		 student.setPageResults(10);
    		 student.setPage(2);
    		 _logger.info("queryPageResults by mapperId "+service.queryPageResults("queryPageResults1",student));
    		 
    	}
    
    	@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("init ...");
    		context = new ClassPathXmlApplicationContext(new String[] {"spring/applicationContext.xml"});
    		WebContext.applicationContext=context;
    		service =(StudentsService)WebContext.getBean("studentsService");
    	}
    	
    }

    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、Spring XML配置

      <tx:annotation-driven transaction-manager="txManager" />
    
      <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
      </bean>
    
        <!-- enable autowire -->
        <context:annotation-config />
    
        <!-- enable transaction demarcation with annotations 
        <tx:annotation-driven />-->
    
    	<!--<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">-->
    	<bean id="sqlSessionFactory" class="org.apache.mybatis.jpa.MyBatisSessionFactoryBean">
    		<property name="timeout" value="30" />
    		<property name="dataSource" ref="dataSource" />
    		<property name="mapperLocations" value="classpath*:/org/apache/mybatis/jpa/test/dao/persistence/xml/mysql/*.xml" />
    		<property name="typeAliasesPackage" 
            		  value="
    	        			org.apache.mybatis.jpa.test.domain,
            			" />
    		<property name="transactionFactory">
    			<bean class="org.apache.ibatis.transaction.managed.ManagedTransactionFactory" />
    		</property>
    		<property name="interceptors">
    			<list>
    					<bean class="org.apache.mybatis.jpa.StatementHandlerInterceptor">
    						<property name="dialectString" value="org.apache.mybatis.jpa.dialect.MySQLDialect"/>
    					</bean>
    			</list>
    		</property>
    	</bean>
    
        <!-- scan for mappers and let them be autowired -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" 
            		  value="
            		  		org.apache.mybatis.jpa.test.dao.persistence,
            		  		" />
        </bean>
    
     	<!-- enable component scanning (beware that this does not enable mapper scanning!) -->    
        <context:component-scan base-package="org.apache.mybatis.jpa.test.dao.service" />
        
        <bean class ="org.apache.mybatis.jpa.id.IdentifierGeneratorFactory">
    	    <property name="generatorStrategyMap" >
    	    	<map>
    		        <entry key="serial" >
    		        	<bean class="org.apache.mybatis.jpa.id.SerialGenerator">
    		        		<property name="ipAddressNodeValue"  value="F0-76-1C-B0-26-9C=02,"/>
    		        	</bean></entry>
    		    </map>
    	    </property>
        </bean>
        
       	<!-- 
    	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    		<constructor-arg index="0" ref="sqlSessionFactory" />
    	</bean>
    	 -->

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