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Spring JdbcTemplate batchUpdate() 实例

在某些情况下,可能需要将一批记录插入到数据库中。如果你对每条记录调用一个插件的方法,SQL语句将被重复编译,造成系统缓慢进行。
在上述情况下,你可以使用 JdbcTemplate BATCHUPDATE()方法来执行批量插入操作。用这种方法,该语句只被编译一次,执行多次。
详见 JdbcTemplate 类的 BATCHUPDATE()示例。
//insert batch examplepublic 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();	}  });}
或者,可以直接执行SQL。
//insert batch example with SQLpublic void insertBatchSQL(final String sql){			getJdbcTemplate().batchUpdate(new String[]{sql});		}
Spring 的 bean 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.yiibai.customer.dao.impl.JdbcCustomerDAO">		<property name="dataSource" ref="dataSource" />	</bean>		<bean id="dataSource"         class="org.springframework.jdbc.datasource.DriverManagerDataSource">		<property name="driverClassName" value="http://www.mamicode.com/com.mysql.jdbc.Driver" />		<property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/yiibaijava" />		<property name="username" value="http://www.mamicode.com/root" />		<property name="password" value="http://www.mamicode.com/password" />	</bean>	</beans>

执行它

package com.yiibai.common;import java.util.ArrayList;import java.util.List;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.yiibai.customer.dao.CustomerDAO;import com.yiibai.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, "yiibai1",21);        Customer customer3 = new Customer(2, "yiibai2",22);        Customer customer2 = new Customer(3, "yiibai3",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);          }}
在本例中,插入三条顾客的记录,并批量更新所有客户的名字。
 
下载代码 – http://pan.baidu.com/s/1jGTXfgi

Spring JdbcTemplate batchUpdate() 实例