MYSQL批量插入数据

@Test
public void test(){
long time1 = new Date().getTime();
int count = 0;
String sql = "insert into ip_table(ip_add,country,time) values(?,?,?)";
try {
conn.setAutoCommit(false);        //如何没有设置此参数，则要435秒，设置之后只有11秒
pst = conn.prepareStatement(sql);
} catch (SQLException e1) {
e1.printStackTrace();
}
for (int i = 0; i < 256; i++) {
for (int j = 0; j < 256; j++) {
count ++;
String ip = "24.91."+i+"."+j;
System.out.println(count);
    try {
    pst.setString(1, ip);
    pst.setString(2, "US");
    pst.setString(3, DateUtil.getStringCurrentDateTime());
    pst.addBatch();
    if(count % 1000 == 0){ //如果1000改为5000或10000，时间则为10秒
    pst.executeBatch();
    conn.commit();
    pst.clearBatch();        //此行可以不要，速度一样
    }
    } catch (SQLException e) {  
    e.printStackTrace();  
    }
}
}
try {
pst.executeBatch();
conn.commit();
} catch (SQLException e) {
e.printStackTrace();
}
long time2 = new Date().getTime();
System.out.println("用时："+(time2-time1)/1000+" 秒");

}