Mybatis 一对一(OneToOne)关系映射__INSERT

今天测试Ibatis的一对一的关联映射时总是出现错误,其中很多的错误都是自己不小心写错的..现把整个Ibatis源代码记录下来,以便以后熟记:

1.数据库脚本:

CREATE TABLE t_person(
  id int(3) not null auto_increment,
  name varchar(20) default null,
  age int(3) default 0,
  primary key (id)
) charset="gb2312";

CREATE TABLE t_passport(
  id int(3),
  serial varchar(20) default NULL,
  expiry int(3) default NULL,
  PRIMARY KEY (id),
  CONSTRAINT fk_passport FOREIGN KEY (id) REFERENCES t_person(id)    
)charset="gb2312";

--t_passport中,id既为主键,而且主键又参照外键t_person

 

 

2.创建实体类(Pojo) :Person

package com.lixing.ibatis.entity.onetoone;

import java.io.Serializable;

public class Person implements Serializable{
  private static final long serialVersionUID = 4524251837950555570L;
  private int id;
  private String name;
  private int age;
    
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
}

 

 

Passport

package com.lixing.ibatis.entity.onetoone;

public class Passport {
  private int id;
  private String serial;
  private int expiry;
    
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getSerial() {
    return serial;
  }
  public void setSerial(String serial) {
    this.serial = serial;
  }
  public int getExpiry() {
    return expiry;
  }
  public void setExpiry(int expiry) {
    this.expiry = expiry;
  }    
}

 

3.创建Mapper接口:(PersonMapper)

package com.lixing.ibatis.onetoone.mapper;

import com.lixing.ibatis.entity.onetoone.Person;

public interface PersonMapper {
  void insertPerson(Person person);
}

 

PasssportMapper

package com.lixing.ibatis.onetoone.mapper;

import com.lixing.ibatis.entity.onetoone.Passport;

public interface PassportMapper {
  void insertPassport(Passport passport);
}

 

4.在PersonMapper、PassportMapper接口目录下创建两个XML文件：

PersonMapper.XML

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"    
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lixing.ibatis.onetoone.mapper.PersonMapper">
  <parameterMap type="Person" id="parameterPersonMap">
    <parameter property="id"/>
    <parameter property="name"/>
    <parameter property="age"/>
  </parameterMap>
    
  <insert id="insertPerson"    parameterMap="parameterPersonMap">
    <selectKey    keyProperty="id" resultType="int" order="AFTER">
      SELECT LAST_INSERT_ID() AS ID
    </selectKey>
    INSERT INTO t_person(name,age)
    VALUES(#{name},#{age})    <!--记得不要有逗号-->
  </insert>    
</mapper>    

 

PassportMapper.XML

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"    
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lixing.ibatis.onetoone.mapper.PassportMapper">
  <parameterMap type="Passport" id="passportMap">
    <parameter property="id"/>
    <parameter property="serial"/>
    <parameter property="expiry"/>    
  </parameterMap>
    
  <insert id="insertPassport" parameterMap="passportMap">
    INSERT INTO t_passport(id,serial,expiry)
    VALUES(?,?,?)
  </insert>                
</mapper>

 

5.myibatis配置文件(mybatis-config.xml)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
  <settings>
    <!-- changes from the defaults for testing -->
    <setting name="cacheEnabled" value="false" />
    <setting name="useGeneratedKeys" value="true" />
    <setting name="defaultExecutorType" value="REUSE" />
  </settings>
    
  <typeAliases>
    <!--在此申明两个别名类,-->
    <typeAlias alias="Passport" type="com.lixing.ibatis.entity.onetoone.Passport" />
        
    <typeAlias alias="Person" type="com.lixing.ibatis.entity.onetoone.Person"/>
  </typeAliases>

  <environments default="development">
    <environment id="development">
      <transactionManager type="JDBC" />
      <dataSource type="POOLED">
        <property name="driver" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/test" />
        <property name="username" value="root" />
        <property name="password" value="7501857" />
      </dataSource>
    </environment>
  </environments>
  <mappers> 
    <mapper resource="com/lixing/ibatis/onetoone/mapper/PassportMapper.xml" />
    
    <mapper resource="com/lixing/ibatis/onetoone/mapper/PersonMapper.xml" />
        
  </mappers>
</configuration>

 

 

6.加入Junit做测试:

package com.lixing.ibatis.test;

import java.sql.SQLException;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.transaction.Transaction;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.transaction.jdbc.JdbcTransaction;
import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.lixing.ibatis.entity.onetoone.Passport;
import com.lixing.ibatis.entity.onetoone.Person;
import com.lixing.ibatis.onetoone.mapper.PassportMapper;
import com.lixing.ibatis.onetoone.mapper.PersonMapper;
import com.lixing.ibatis.util.MyBatisUtil;

public class PassportMapperTest {
  private SqlSessionFactory sqlSessionFactory = null;
  private SqlSession session = null;

  @Before
  public void before() {
    sqlSessionFactory = MyBatisUtil.getInstance();
    session = sqlSessionFactory.openSession();
  }

  @Test
  public void testInsertPerson() throws SQLException {
    

    Person person = new Person();
    person.setName("李新2");
    person.setAge(25);
    
    Passport passport = new Passport(); 
  //    passport.setId(person.getId());    //写在此处是错误的
    passport.setSerial("Serial2");
    passport.setExpiry(22222);
    
    
    TransactionFactory transactionFactory = new JdbcTransactionFactory();
    Transaction tx = transactionFactory.newTransaction(session
        .getConnection(), false);    
    PersonMapper personMapper = session.getMapper(PersonMapper.class);
    PassportMapper passportMapper = session.getMapper(PassportMapper.class);
    try{
      personMapper.insertPerson(person);    
      passport.setId(person.getId());  //必须写在insertPerson之后
      passportMapper.insertPassport(passport);
      tx.commit();
    }catch(Exception e){
      tx.rollback();
      e.printStackTrace();
    }finally{
      tx.close();
      System.out.println(person.getId());
    }
  } 


  @After
  public void after() {
    // session.close();
  }
}

 

整个项目打包上传(不包括mybatis类库)