一.code
import org.junit.jupiter.api.Test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; public class TestBatch { @Test public void test1()throws Exception{ //没有用批处理的功能 long start = System.currentTimeMillis(); //建立连接 String url = "jdbc:mysql://localhost:3306/jdbctest"; String user = "root"; String pwd = "123456"; Connection connection = DriverManager.getConnection(url, user, pwd); //编写sql String sql = "insert into t_department values(null,?,?)"; PreparedStatement preparedStatement = connection.prepareStatement(sql); for(int i=1; i<=2000; i++){ preparedStatement.setObject(1, "模拟部门名称" + i ); preparedStatement.setObject(2, "模拟部门简介" + i ); preparedStatement.executeUpdate(); //执行2000遍 } preparedStatement.close(); connection.close(); long end = System.currentTimeMillis(); System.out.println("耗时：" +(end-start)); //耗时：6554} @Test public void test2()throws Exception{ //使用批处理功能 long start = System.currentTimeMillis(); /* MySQL服务器端，默认批处理功能没有开启。需要通过参数告知mysql服务器，开启批处理功能。 在url后面再加一个参数 rewriteBatchedStatements=true*/ //建立连接 String url = "jdbc:mysql://localhost:3306/jdbctest"; String pwd = "123456"; String user = "root"; Connection connection = DriverManager.getConnection(url, user, pwd); //编写sql String sql = "insert into t_department values(null,?,?)"; PreparedStatement preparedStatement = connection.prepareStatement(sql); for(int i=2001; i<=4000; i++){ preparedStatement.setObject(1, "模拟部门名称a" + i ); preparedStatement.setObject(2, "模拟部门简介b" + i );preparedStatement.addBatch();//先攒着}preparedStatement.executeBatch();//执行批处理功能preparedStatement.close(); connection.close(); long end = System.currentTimeMillis(); System.out.println("耗时：" +(end-start));//耗时：729}}
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