Spring JdbcTemplate.batchUpdate 例子

最近再看开源项目阿里巴巴的数据库同步项目Otter https://github.com/alibaba/otter的时候，看到里面很多时候都使用了JdbcTemplate 来对数据进行相应的数据操作。

这里写一个使用批操作的batchUpdate()的例子，来自spring-jdbctemplate-batchupdate-example

 

需要使用批操作来操作数据库的数据。

第一种用法：

//insert batch example
public void insertBatch(final List<Customer> customers){
  
  String sql = "INSERT INTO CUSTOMER " +
 "(CUST_ID, NAME, AGE) VALUES (?, ?, ?)";
   
  getJdbcTemplate().batchUpdate(sql, new BatchPreparedStatementSetter() {
   
 @Override
 public void setValues(PreparedStatement ps, int i) throws SQLException {
  Customer customer = customers.get(i);
  ps.setLong(1, customer.getCustId());
  ps.setString(2, customer.getName());
  ps.setInt(3, customer.getAge() );
 }
   
 @Override
 public int getBatchSize() {
  return customers.size();
 }
  });
}

第二种用法（当然你可以直接运行sql语句）：

//insert batch example with SQL
public void insertBatchSQL(final String sql){
  
 getJdbcTemplate().batchUpdate(new String[]{sql});
  
}

Spring的配置文件

 

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

 <bean id="customerDAO" class="com.mkyong.customer.dao.impl.JdbcCustomerDAO">
  <property name="dataSource" ref="dataSource" />
 </bean>
 
 <bean id="dataSource" 
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">

  <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  <property name="url" value="jdbc:mysql://localhost:3306/mkyongjava" />
  <property name="username" value="root" />
  <property name="password" value="password" />
 </bean>
 
</beans>

运行：

 

package com.mkyong.common;

import java.util.ArrayList;
import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.mkyong.customer.dao.CustomerDAO;
import com.mkyong.customer.model.Customer;

public class App 
{
    public static void main( String[] args )
    {
     ApplicationContext context = 
      new ClassPathXmlApplicationContext("Spring-Customer.xml");
      
        CustomerDAO customerDAO = (CustomerDAO) context.getBean("customerDAO");
        Customer customer1 = new Customer(1, "mkyong1",21);
        Customer customer3 = new Customer(2, "mkyong2",22);
        Customer customer2 = new Customer(3, "mkyong3",23);
  
        List<Customer>customers = new ArrayList<Customer>();
        customers.add(customer1);
        customers.add(customer2);
        customers.add(customer3);
        
        customerDAO.insertBatch(customers);

        String sql = "UPDATE CUSTOMER SET NAME ='BATCHUPDATE'";
        customerDAO.insertBatchSQL(sql);
      
    }
}