1.addBatch()、executeBatch()、clearBatch()
2.mysql服务器默认是关闭批处理的,我们需要通过一个参数,让mysql开启批处理的支持。?rewriteBatchedStatements=true 写在配置文件的url后面
3.使用更新的mysql 驱动:mysql-connector-java-5.1.37-bin.jar
4.设置连接不允许自动提交数据
最终版的代码体现:
@Test
public void testInsert3() {
Connection conn = null;
PreparedStatement ps = null;
try {
long start = System.currentTimeMillis();
conn = JDBCUtils.getConnection();
**//设置不允许自动提交数据
conn.setAutoCommit(false);**
String sql = "insert into goods(name)values(?)";
ps = conn.prepareStatement(sql);
for(int i = 1;i <= 1000000;i++){
ps.setObject(1, "name_" + i);
**//1."攒"sql
ps.addBatch();**
if(i % 500 == 0){
**//2.执行batch
ps.executeBatch();**
**//3.清空batch
ps.clearBatch();**
}
}
**//提交数据
conn.commit();**
long end = System.currentTimeMillis();
System.out.println("花费的时间为:" + (end - start)); //20000:83065 -- 565
} catch (Exception e) { //1000000:16086 -- 5114
e.printStackTrace();
}finally{
JDBCUtils.closeResource(conn, ps);
}
}