java实现sql语句批处理

Statement实现批处理：

优点：能够处理多种不同结构的sql语句

缺点：不能预处理，执行效率较差。对于参数不同的同一条sql语句需要多次调用addBatch()

package com.itheima.batch;

import java.sql.Connection;
import java.sql.Statement;

import org.junit.Test;

import com.itheima.util.DBUtil;

public class StatementBatch {

	/*	mysql数据库：
	 	create database batch;
	 	use batch;
	 	create table mybatch(
	 		id int primary key auto_increment,
	 		name varchar(50)
	 	);
	 	insert into mybatch values (null, '1');
	 	insert into mybatch values (null, '2');
	 	insert into mybatch values (null, '3');
	 	insert into mybatch values (null, '4');
	 */
	@Test
	public void statementBatch() {
		Connection conn = null;
		Statement stat = null;
		try{
			conn = DBUtil.getConn();
			stat = conn.createStatement();
			stat.addBatch("create database batch");
			stat.addBatch("use batch");
			stat.addBatch("create table mybatch( id int primary key auto_increment, name varchar(50) )");
			stat.addBatch("insert into mybatch values (null, '1')");
			stat.addBatch("insert into mybatch values (null, '2')");
			stat.addBatch("insert into mybatch values (null, '3')");
			stat.addBatch("insert into mybatch values (null, '4')");
			stat.executeBatch();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(conn, stat, null);
		}
	}
}

PreparedStatement实现批处理：

优点：能够预处理，执行效率高；参数不同的同一条sql语句执行简便

缺点：只能批处理参数不同的同一条sql语句

package com.itheima.batch;

import java.sql.Connection;
import java.sql.PreparedStatement;

import org.junit.Test;

import com.itheima.util.DBUtil;

public class PrepBatch {

	@Test
	public void prepBatch() {

		Connection conn = null;
		PreparedStatement ps = null;
		try{
			conn = DBUtil.getConn();
			ps = conn.prepareStatement("insert into mybatch value(null, ?)");
			for(int i = 0; i < 1000; i++) {
				ps.setString(1, "name" + i);
				ps.addBatch();
			}
			ps.executeBatch();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(conn, ps, null);
		}
	}
}