用代码详解spring中如何使用mybatis实现批量插入

public interface StudentMapper05 {
  public void insertStudent(List<Student> studentList);
}

<insert id="insertStudent">
  BEGIN
  <foreach collection="list" item="student" index="index" separator="">
    INSERT INTO test_student(ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL) 
    VALUES
    (SEQ_ID.nextval, #{student.name}, #{student.branch}, #{student.percentage}, #{student.phone}, #{student.email});
  </foreach>
  END;
</insert>

BEGIN
INSERT INTO test_student(ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL) VALUES (SEQ_ID.nextval, ?, ?, ?, ?, ?);
INSERT INTO test_student(ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL) VALUES (SEQ_ID.nextval, ?, ?, ?, ?, ?);
INSERT INTO test_student(ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL) VALUES (SEQ_ID.nextval, ?, ?, ?, ?, ?);
...
END;

public class StudentDao05 {
  private StudentMapper05 studentMapper; // 省略getter和setter
  
  public void insertStudentList(List<Student> studentList) {
    studentMapper.insertStudent(studentList);
  }
}

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="oracleDataSource" />
  <property name="configLocation" value="classpath:mybatis/config/mybatis-config-05.xml"/>
</bean>
<bean id="studentMapper05" class="org.mybatis.spring.mapper.MapperFactoryBean">
  <property name="mapperInterface" value="com.ws.experiment.spring.mybatis.mapper.StudentMapper05" />
  <property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="studentDao05" class="com.ws.experiment.spring.mybatis.dao.StudentDao05">
  <property name="studentMapper" ref="studentMapper05" />
</bean>

public static void main(String[] args) {
  String[] configFiles = new String[]{"spring-beans-config.xml", "mybatis/mybatis-spring-05.xml"};  // 分别配置datasource和mybatis相关bean
  ApplicationContext context = new ClassPathXmlApplicationContext(configFiles);
  
  StudentDao05 studentDao = (StudentDao05)context.getBean("studentDao05");
  
  int counts[] = new int[]{10, 50, 100, 200, 500, 1000, 2000, 3000, 5000, 8000};
  for (int count : counts) {
    List<Student> studentList = new ArrayList<>();
    for (int i = 0; i < count; i++) {
      Student st = new Student();
      st.setName("name");
      st.setBranch("");
      st.setEmail("");
      st.setPercentage(0);
      st.setPhone(0);
      studentList.add(st);
    }
    long startTime = System.currentTimeMillis();
    studentDao.insertStudentList(studentList);
    long endTime = System.currentTimeMillis();
    System.out.println("插入" + count + "笔数据耗时: " + (endTime - startTime) +" ms");
  }
}

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  <property name="dataSource" ref="oracleDataSource" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager" />

public interface StudentMapper06 {
  public void insertStudent(@Param("student") Student student);
}

<insert id="insertStudent">
  INSERT INTO test_student(ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL) 
  VALUES
  (SEQ_ID.nextval, #{student.name}, #{student.branch}, #{student.percentage}, #{student.phone}, #{student.email})
</insert>

public class StudentDao06 {
  private StudentMapper06 studentMapper; // 省略getter和setter
  
  @Transactional // spring事务控制
  public void insertStudentList(List<Student> students) {
    for (Student student : students) {
      studentMapper.insertStudent(student);
    }
  }
}

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="oracleDataSource" />
  <property name="configLocation" value="classpath:mybatis/config/mybatis-config-06.xml"/>
</bean>
<bean id="studentMapper06" class="org.mybatis.spring.mapper.MapperFactoryBean">
  <property name="mapperInterface" value="com.ws.experiment.spring.mybatis.mapper.StudentMapper06" />
  <property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="studentDao06" class="com.ws.experiment.spring.mybatis.dao.StudentDao06">
  <property name="studentMapper" ref="studentMapper06" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="oracleDataSource" />
  <property name="configLocation" value="classpath:mybatis/config/mybatis-config-06.xml"/>
</bean>

<configuration>
  <settings>
    <!-- 默认打开BATCH的Executor -->
    <setting name="defaultExecutorType" value="BATCH" />
  </settings>
  <mappers>
    <mapper class="com.ws.experiment.spring.mybatis.mapper.StudentMapper06" />
  </mappers>
</configuration>

SqlSessionFactory sqlSessionFactory = (SqlSessionFactory)context.getBean("sqlSessionFactory");
SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH, false);
StudentMapper06 studentMapper = sqlSession.getMapper(StudentMapper06.class);
for (int i = 0; i < count; i++) {
  Student st = new Student();
  st.setName("name");
  ...
  studentMapper.insertStudent(st);
}
sqlSession.commit();
sqlSession.clearCache();
sqlSession.close();

<!-- 以ExecutorType.BATCH方式插入数据库 -->
<bean id="batchSqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
  <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory" />
  <constructor-arg name="executorType" value="BATCH" />
</bean>
<bean id="studentMapper06_batch" class="org.mybatis.spring.mapper.MapperFactoryBean">
  <property name="mapperInterface" value="com.ws.experiment.spring.mybatis.mapper.StudentMapper06" />
  <property name="sqlSessionTemplate" ref="batchSqlSessionTemplate" />
</bean>
<bean id="studentDao06_batch" class="com.ws.experiment.spring.mybatis.dao.StudentDao06">
  <property name="studentMapper" ref="studentMapper06_batch" />
</bean>