python
python分割多空格字符串
长度不同的空格分割的字符串,如果直接用str.split(" ")只会分割一个空格
直接用split()就好,它会默认按空格分割并把结果中的空字符串删掉。
linux
复制文件
cp dir1/a dir2
SQL
查询某字段不为某值的行
select * from table+name where row not like “ABC”;
HTML
在控制台输出信息
console.log()
获取当前节点的html包括当前节点的方法
jQuery.html()是获取当前节点下的html代码,并不包含当前节点本身的代码
.prop(“outerHTML”)获取包含当前节点本身的代码以及当前节点下的html代码
jquery添加子元素
$(‘body’).append(‘html字符串’);
jquery改变html元素内容
$(‘body’).html(content)
js
从字符串中抽取从start下标开始的指定数目的字符
stringObject.substr(start,length)
是length,不是end
message出现转义和//“的转义
sb.append(""").append(rs.getString(4).replace("\","\\").replace(""","\"")).append(""");
tbody id没赋值
<tbody style="max-width:1260px" id="example_body">
读写日志代码(cron)
#! /usr/local/bin/python3
from pymysql import connect
conn_cx = connect(host='10.10.108.65', port=3306, user='root', passwd=str("123456"), db="ZY", charset='utf8')
def log_reader(row):
cursor_insert = conn_cx.cursor()
a=row.split()
time=row[:15]
hostname=a[3]
user=a[4].strip(":")
message=":".join(row.split(":")[3:])[1:]
source="/var/log/message"
tap="physical machine"
#time,hostname,user,message,source,tap(data type,i.e. "Linux log system runtime state" )
cursor_insert.execute("INSERT INTO log_91_cron (time,hostname,user,message,source,tap) VALUES (%s,%s,%s,%s,%s,%s);",
(time, hostname, user, message,source,tap))
conn_cx.commit()
import fileinput
import time
import os
target_file = '/var/log/cron-20200705'
init_flag = True # 初次加载程序
time_kick = 5
record_count = 0
while True:
print('当前读到了', record_count)
#没有日志文件,等待
if not os.path.exists(target_file):
print('target_file not exist')
time.sleep(time_kick)
continue
try:
if init_flag:
#读取整个文件
for eachline in fileinput.input(target_file):
#print(eachline)
log_reader(eachline)
record_count += 1
init_flag = False
else:
#如果总行数小于当前行,那么认为文件更新了,从第一行开始读。
total_count = os.popen('wc -l %s' % target_file).read().split()[0]
total_count = int(total_count)
if total_count < record_count:
record_count = 0
for eachline in fileinput.input(target_file):
line_no = fileinput.filelineno()
#print(line_no)
if line_no > record_count:
# print(eachline)
log_reader(eachline)
record_count += 1
except:
pass
time.sleep(time_kick)
conn_cx.close()