?????????д?????????MySQL??????в??????????????????????????????￡?use db_xk;

drop table if exists tb_test2;
create table tb_test2 (
id int primary key auto_increment??
subject varchar(50) not null??
description varchar(200) not null??
teacher_id int(10) zerofill not null??
student_id int(10) zerofill default null??
state boolean not null default false
);state boolean not null default false
);

?????????????????￡?

package test;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import util.DBUtil;
public class TestDataBase2 {
public static void main(String[] args) {
Connection conn = DBUtil.getConnection();
String sql = "insert into tb_test2(subject?? description?? teacher_id?? student_id) values (??????????)";
try {
PreparedStatement prep = conn.prepareStatement(sql);
// ??????????????????????????????????????????
conn.setAutoCommit(false);
long start = System.currentTimeMillis();
for (int i = 0; i < 10; i++) {
long start2 = System.currentTimeMillis();
// ???????в???10????????
for (int j = 0; j < 100000; j++) {
prep.setString(1?? "test2");
prep.setString(2?? "test3");
prep.setInt(3?? 1234562);
prep.setInt(4?? 12354545);
// ???????????????
prep.addBatch();
}
// ????????????
prep.executeBatch();
prep.clearBatch();
conn.commit();
long end2 = System.currentTimeMillis();
// ???????????????????????ε????
System.out.print("inner"+i+": ");
System.out.println(end2 - start2);
}
long end = System.currentTimeMillis();
System.out.print("total: ");
System.out.println(end - start);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn);
}
}
}