#!/usr/bin/env python

import os
import sys
import re base_dir = '/opt/software/mysql-5.7.17-linux-glibc2.5-x86_64' os.chdir('/opt/software')
tar_result = os.system('tar xvf %s &>/dev/null' % sys.argv[])
if tar_result == :
os.chdir('/usr/local')
os.system('ln -s %s mysql' % base_dir)
else:
print "uncompress wrong" user_result = os.system('id mysql')
if user_result==:
print "user exist"
else:
os.system('groupadd mysql')
os.system('useradd -g mysql -M -s /sbin/login mysql') os.system('mkdir -p /data/mysql/mysql3306/{data,logs,tmp}')
os.system('chown -R mysql:mysql /data/mysql/mysql3306/')
os.system('chown -R mysql:mysql /opt/software/mysql-5.7.17-linux-glibc2.5-x86_64')
os.system('chown -R mysql:mysql /usr/local/mysql')
os.chdir('/opt/software')
os.system('cp my.cnf /etc/my.cnf')
os.chdir('/usr/local/mysql')
init = os.system('./bin/mysqld --initialize')
if init == :
with open('/data/mysql/mysql3306/data/error.log') as fobj:
for line in fobj:
if 'root@localhost' in line:
m = re.search('(root@localhost:)(.+)',line)
if m:
passwd = m.group()
print "password:%s" % passwd
os.system('cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld')
os.system('export PATH=$PATH:/usr/local/mysql/bin')
with open('/etc/profile','a+') as profile:
profile.write('\nPATH=$PATH:/usr/local/mysql/bin')

转自

Python脚本安装MySQL5.7 - Time.catcher - 博客园
https://www.cnblogs.com/weiwenbo/p/6640605.html

python版本:python2.6

centos版本:centos6.9

mysql版本:mysql5.7.19

安装目录路径和数据目录路径都是固定,当然也可以自己修改

这个脚本的原理是,通过createmycnf.sh的shell脚本生成my.cnf,buffer pool大小等在shell脚本里已经计算好,然后installmysql.py修改生成好的my.cnf里的端口等变量

并根据my.cnf来初始化mysql,初始化完毕之后启动mysql服务,并设置mysql的root用户密码,整个执行过程的日志会保存在当前目录下的installmysql.log

注意:目前不支持多实例安装,只支持单实例安装

执行脚本前要先安装MySQL-python

yum install -y MySQL-python

installmysql.py

installmysql.py脚本参数

-P:mysql端口号
-f:mysql二进制安装包位置
-b:createmycnf.sh文件的位置
-p:mysql的root用户密码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @Author : huazai
# @Time : 2017/5/4 22:04
# @File : installmysql.py
# @Description : mysql数据目录路径:/data/mysql/ ,mysql安装目录路径:/usr/local/mysql import os
import sys
from optparse import OptionParser
from subprocess import Popen, PIPE
import shlex
import time
import MySQLdb
import re
import shutil
import tarfile
import stat
import logging
import pwd logger = None
MYSQL_DATA_DIR = '/data/mysql/'
MYSQL_INSTALL_DIR = '/usr/local/mysql/'
MYSQL_CONF_DIR = '/etc/'
MYSQL_BACK_DIR = '/data/backup/mysql/'
MYSQL_STARTUP_SCRIPT = '/etc/init.d/mysql' def init_log():
global logger
fmt_date = '%Y-%m-%d %H:%M:%S.%s'
fmt_file = '%(lineno)s %(asctime)s [%(process)d]: %(levelname)s %(filename)s %(message)s' log_file = 'installmysql.log'
logger = logging.getLogger('mysqlinstallloging')
logger.setLevel(logging.INFO)
file_handler = logging.FileHandler(log_file, mode='a')
file_handler.setFormatter(logging.Formatter(fmt_file, fmt_date))
logger.addHandler(file_handler) def opt():
parser = OptionParser("Usage: %prog -P -f -b -p")
parser.add_option("-P", "--port",
dest="port",
action="store",
default="",
help='port 3306')
parser.add_option("-f", "--tarfile",
dest="tarfile",
action="store",
default="/tmp/mysql-5.6.28-linux-glibc2.5-x86_64.tar.gz",
help='file /tmp/mysql-5.6.28-linux-glibc2.5-x86_64.tar.gz')
parser.add_option("-b", "--bashfile",
dest="myfile",
action="store",
default="/tmp/createmycnf.sh",
help='file /tmp/createmycnf.sh')
parser.add_option("-p", "--mysqlpwd",
dest="mysqlpwd",
action="store",
default="",
help='password 123456')
options, args = parser.parse_args()
return options, args # 设置安装目录和数据目录的权限
def setOwner(mysqlport):
list=[]
with open('/etc/passwd', 'r') as fd:
for line in fd:
matchmysql = re.search(r'mysql', line, re.I) if matchmysql:
os.system('chown -R mysql:mysql %s' % MYSQL_DATA_DIR)
os.system('chown -R mysql:mysql %s' % MYSQL_INSTALL_DIR)
else:
os.system('useradd -M -s /sbin/nologin mysql')
os.system('chown -R mysql:mysql %s' % MYSQL_DATA_DIR)
os.system('chown -R mysql:mysql %s' % MYSQL_INSTALL_DIR)
#检查安装目录和数据目录权限
for i in pwd.getpwnam('mysql'):
list.append(i)
mysqluid = list[2]
mysqlgid = list[3]
stdatadirmode = os.stat(MYSQL_DATA_DIR).st_mode
stinstalldirmode = os.stat(MYSQL_INSTALL_DIR).st_mode
if not (os.stat(MYSQL_DATA_DIR).st_uid == mysqluid and os.stat(MYSQL_DATA_DIR).st_gid == mysqlgid):
logger.error('chown mysql datadir or installdir not ok ')
sys.exit(1)
if not (os.stat(MYSQL_DATA_DIR+'mysql%s/data' %(mysqlport)).st_uid == mysqluid and os.stat(MYSQL_DATA_DIR+'mysql%s/data' %(mysqlport)).st_gid == mysqlgid):
logger.error('chown mysql datadir or installdir not ok ')
sys.exit(1)
if not (os.stat(MYSQL_DATA_DIR+'mysql%s/logs' %(mysqlport)).st_uid == mysqluid and os.stat(MYSQL_DATA_DIR+'mysql%s/data' %(mysqlport)).st_gid == mysqlgid):
logger.error('chown mysql datadir or installdir not ok ')
sys.exit(1)
if not (os.stat(MYSQL_DATA_DIR + 'mysql%s/tmp' % (mysqlport)).st_uid == mysqluid and os.stat(MYSQL_DATA_DIR + 'mysql%s/tmp' % (mysqlport)).st_gid == mysqlgid):
logger.error('chown mysql datadir or installdir not ok ')
sys.exit(1) # 创建必要的目录
def makeDIR(port):
if os.path.exists('/data/mysql/mysql%s/data' % port):
logger.error('mysql %s already install' % port)
sys.exit(1) try:
# os.makedirs('/usr/local/mysql')
os.makedirs('/data/mysql/mysql%s/data' % port)
os.makedirs('/data/mysql/mysql%s/tmp' % port)
os.makedirs('/data/mysql/mysql%s/logs' % port)
except Exception, e:
logger.error(e) # 解压二进制安装包
def extract(mysqlfile):
if not os.path.exists(mysqlfile):
logger.error('%s is not exists' % mysqlfile)
sys.exit(1)
os.chdir(os.path.dirname(mysqlfile))
t = tarfile.open(mysqlfile, 'r:gz')
t.extractall() # 解压到当前目录
t.close() # 拷贝安装包文件到程序目录
def copyFile(mysqlfile):
shutil.copytree(mysqlfile.split('.tar.gz')[0], MYSQL_INSTALL_DIR)
shutil.copy2(MYSQL_INSTALL_DIR + 'support-files/mysql.server', MYSQL_STARTUP_SCRIPT)
shutil.rmtree(mysqlfile.split('.tar.gz')[0]) # 设置环境变量
def setEnv():
with open('/etc/profile', 'a') as fd:
fd.write('export PATH=$PATH:/usr/local/mysql/bin' + '\n')
os.system('source /etc/profile') # 初始化mysql
def mysqlInstall():
cnf = '/etc/my.cnf'
if os.path.exists(cnf):
cmd = MYSQL_INSTALL_DIR + "bin/mysqld --defaults-file=%s --initialize-insecure" % cnf
p = Popen(shlex.split(cmd), stdout=PIPE, stderr=PIPE)
stdout, stderr = p.communicate()
if stdout:
logger.info('install output: %s' % (stdout))
if stderr:
logger.error('install error output: %s' % (stderr)) if p.returncode == 0:
logger.info('initialize completed')
logger.info('install returncode: %s' % (p.returncode))
else:
logger.info('initialize failed , please check the mysql errror log')
logger.info('install returncode: %s' % (p.returncode))
sys.exit(1)
else:
logger.error(cnf + ' do not esixts')
sys.exit(1) # 设置my.cnf
def mycnfCreate(mybashfile, mysqlport):
cnf = '/etc/my.cnf'
cmd = "/bin/bash %s" % mybashfile
p = Popen(shlex.split(cmd), stdout=PIPE, stderr=PIPE)
p.communicate()
p.returncode
f1 = open(cnf, "r", )
f2 = open("%s.bak" % cnf, "w", )
for line in f1:
f2.write(re.sub(r'', mysqlport, line, count=1))
f1.close()
f2.close()
os.remove(cnf)
os.rename("%s.bak" % cnf, cnf) # 设置启动脚本
def modifyStartupscript(port):
isdatadirfind = 0
isbasedirfind = 0
f1 = open(MYSQL_STARTUP_SCRIPT, "r", )
f2 = open("%s.bak" % MYSQL_STARTUP_SCRIPT, "w", )
for line in f1:
if line.startswith('datadir=') and not isdatadirfind:
f2.write(line.replace('datadir=', 'datadir=/data/mysql/mysql%s/data' % port, 1))
isdatadirfind = 1
elif line.startswith('basedir=') and not isbasedirfind:
f2.write(line.replace('basedir=', 'basedir=/usr/local/mysql', 1))
isbasedirfind = 1
else:
f2.write(line)
f1.close()
f2.close()
os.remove(MYSQL_STARTUP_SCRIPT)
os.rename("%s.bak" % MYSQL_STARTUP_SCRIPT, MYSQL_STARTUP_SCRIPT)
# 设置启动脚本执行权限
stmode = os.stat(MYSQL_STARTUP_SCRIPT).st_mode
os.chmod(MYSQL_STARTUP_SCRIPT, stmode | stat.S_IXOTH | stat.S_IXGRP | stat.S_IXUSR) # 检查安装
def checkInstall(port):
if not os.path.exists('/data/mysql/mysql%s/data/ibdata1' % port):
logger.error('mysql not install ')
sys.exit(1)
with open('/data/mysql/mysql%s/logs/error.log' % port, 'r') as fd:
fdlist = [i for i in fd if i]
fdstr = ''.join(fdlist)
re_error = re.compile(r'\s\[error\]\s', re.I | re.M) # 匹配errorlog日志格式
errorlist = re_error.findall(fdstr) if errorlist:
logger.error('error.log error count:' + str(len(errorlist)))
logger.error('mysql not install ')
sys.exit(1)
else:
logger.info('install mysql ok') def mysqlserviceStart():
cnf = '/etc/my.cnf'
cmd = MYSQL_INSTALL_DIR+"bin/mysqld --defaults-file=%s &" %(cnf)
p = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)
stdout, stderr = p.communicate()
if stdout:
logger.info('mysql startup output: %s' % (stdout))
if stderr:
logger.error('mysql startup error output: %s' % (stderr)) if p.returncode == 0:
logger.info('mysql startup completed')
logger.info('mysql startup returncode: %s' % (p.returncode))
else:
logger.info('mysql startup failed , please check the mysql errror log')
logger.info('mysql startup returncode: %s' % (p.returncode))
sys.exit(1)
time.sleep(4) # 休眠4秒 让mysql完全启动完毕 #连接mysql
def connMysql(mysqlport):
cnf = '/etc/my.cnf'
if os.path.exists(cnf):
host = 'localhost'
user = 'root'
dbname = 'mysql'
usocket = MYSQL_DATA_DIR+'mysql%s/tmp/mysql.sock' % (mysqlport)
try:
conn = MySQLdb.connect(host=host, user=user, db=dbname, unix_socket=usocket)
except Exception, e:
logger.error(e)
sys.exit(1)
cur = conn.cursor()
return cur #设置mysql的root的密码
def runSQL(mysqlport, mysqlpwd):
sql = "alter user root@localhost identified by '%s' " % (mysqlpwd)
cur = connMysql(mysqlport)
cur.execute(sql) if __name__ == '__main__':
init_log() options, args = opt()
try:
cmd = args[0]
except IndexError:
print "%s follow a command" % __file__
print "%s -h" % __file__
sys.exit(1) if (options.port and str.isdigit(options.port)) and (options.tarfile and os.path.isfile(options.tarfile)) and (
options.myfile and os.path.isfile(options.myfile)) and (
options.mysqlpwd):
mysqlport = options.port
mysqlfile = options.tarfile
mybashfile = options.myfile
mysqlpwd = options.mysqlpwd else:
print "%s -h" % __file__
sys.exit(1) if cmd == 'create':
mycnfCreate(mybashfile, mysqlport)
logger.info('step1:mycnfCreate completed') makeDIR(mysqlport)
logger.info('step2:makeDIR completed') extract(mysqlfile)
logger.info('step3:extract completed') copyFile(mysqlfile)
logger.info('step4:copyFile completed') setOwner(mysqlport)
logger.info('step5:setOwner completed') mysqlInstall()
logger.info('step6:mysql_install completed') setEnv()
logger.info('step7:setEnv completed') modifyStartupscript(mysqlport)
logger.info('step8:modify_startupscript completed') checkInstall(mysqlport)
logger.info('step9:checkInstall completed') mysqlserviceStart()
logger.info('step10:mysqlserviceStart completed') runSQL(mysqlport, mysqlpwd)
logger.info('step11:runSQL completed') print 'mysql install finish'
        # 调用示例
# python /tmp/installmysql.py -f /data/download/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz -P3306 -p123456 -b /tmp/createmycnf.sh create

createmycnf.sh

#!/bin/bash
# Written by steven
# Name: createmycnf.sh
# Version: v1.
# Function: 创建my.cnf
# Create Date: -- port= #端口
expirelogsdays= #binlog清除时间
relaylogpurge= #mha环境不能清除
innodbbufferpoolsize=$(printf "%1.f\n" `echo "$(free -m |grep Mem|awk '{ print $2}')*0.8"|bc`)M # bufferpool大小,物理内存的80%
innodbiocapacity= # iocapacity大小
innodbpurgethreads= #清除线程数量
performanceschema= # 是否打开P_S库
environment=product #是否是生产环境 ip=$(ip a|awk -F "inet|/" '/inet.*brd/ {print $2}'|awk -F'.' '{print $4}')
serverid=$ip$port cat > /etc/my.cnf<< EOF
[client]
port = $port
socket = /data/mysql/mysql$port/tmp/mysql.sock # The MySQL server
[mysqld]
#########Basic##################
explicit_defaults_for_timestamp=true port = $port
user = mysql
basedir = /usr/local/mysql
datadir = /data/mysql/mysql$port/data
tmpdir = /data/mysql/mysql$port/tmp
pid-file = /data/mysql/mysql$port/tmp/mysql.pid
socket = /data/mysql/mysql$port/tmp/mysql.sock
#skip-grant-tables #character set
character_set_server = utf8mb4 open_files_limit =
back_log =
#event_scheduler = ON
#lower_case_table_names=
log_timestamps =
skip-external-locking
skip_name_resolve =
#skip-networking =
default-storage-engine = InnoDB #timeout
wait_timeout=
lock_wait_timeout=
interactive_timeout=
connect_timeout = server-id =$serverid #ip最后一位+端口号 #percona 的--recursion-method slavehost模式
#report_host = 10.105.9.115
#report_port = #plugin
plugin-load="semisync_master.so;semisync_slave.so" #########SSL#############
ssl-ca = /data/mysql/mysql$port/data/ca.pem
ssl-cert = /data/mysql/mysql$port/data/server-cert.pem
ssl-key = /data/mysql/mysql$port/data/server-key.pem #########undo#############
innodb_undo_logs = #每个tablespace里包含的rollback seg的个数
innodb_undo_directory =/data/mysql/mysql$port/logs/
innodb_max_undo_log_size = 1G
innodb_undo_tablespaces = #undo tablespace的个数
innodb_undo_log_truncate =
innodb_purge_rseg_truncate_frequency = #########error log#############
log-error = /data/mysql/mysql$port/logs/error.log
log_error_verbosity = #########general log#############
#general_log=
#general_log_file=/data/mysql/mysql$port/logs/mysql.log #########slow log#############
slow_query_log =
long_query_time= #0表示记录所有SQL
slow_query_log_file = /data/mysql/mysql$port/logs/mysql.slow ############# for replication###################
log-bin = /data/mysql/mysql$port/logs/mysql-bin
binlog_format = row
max_binlog_size = 500M
binlog_cache_size = 5M
max_binlog_cache_size = 5M
expire-logs-days = $expirelogsdays
slave-net-timeout=
log-slow-slave-statements = log_bin_trust_function_creators =
log-slave-updates =
skip-slave-start =
#super_read_only = #GTID
gtid-mode = on
binlog_gtid_simple_recovery=
enforce_gtid_consistency= #relay log
relay-log = /data/mysql/mysql$port/logs/mysql-relay
relay-log-index=/data/mysql/mysql$port/logs/relay-bin.index
max-relay-log-size = 500M
relay_log_purge = $relaylogpurge #MHA里不能清除relaylog #replication crash safe
sync_master_info =
sync_relay_log_info =
sync_relay_log =
relay_log_recovery =
master_info_repository = TABLE
relay_log_info_repository = TABLE #semisync 动态开启 主从切换的时候用
#rpl_semi_sync_master_enabled =
#rpl_semi_sync_master_wait_no_slave =
#rpl_semi_sync_master_timeout =
#rpl_semi_sync_slave_enabled =
#rpl_semi_sync_master_timeout =
#rpl_semi_sync_master_wait_point = 'after_sync' # after_sync .7增强半同步
#rpl_semi_sync_master_wait_for_slave_count = 等待多少个从库接收到binlog #ignore
#replicate-ignore-db = 'school','school2'
#replicate-do-db = 'school','school2'
#replicate-do-table = 'db1.t1'
#replicate-ignore-table= 'db1.t1' #Multi-threaded Slave
#slave_parallel_workers=
#slave-parallel-type=DATABASE(默认)/LOGICAL_CLOCK
#binlog_group_commit_sync_delay=
#binlog_group_commit_sync_no_delay_count =
#slave_preserve_commit_order= #replication error
#slave-skip-errors=,, #######per_thread_buffers#####################
max_connections=
max_user_connections=
max_connect_errors=
#myisam_recover
max_allowed_packet = 16M
#table_cache =
table_open_cache =
table_definition_cache =
table_open_cache_instances = read_buffer_size = 1M
join_buffer_size = 4M
read_rnd_buffer_size = 1M #myisam
sort_buffer_size = 128K
myisam_max_sort_file_size = 10G
myisam_repair_threads =
key_buffer_size = 64M myisam_sort_buffer_size = 32M
tmp_table_size = 64M
max_heap_table_size = 64M
query_cache_type=
query_cache_size =
bulk_insert_buffer_size = 32M thread_cache_size =
#thread_concurrency =
thread_stack = 192K ###############InnoDB###########################
innodb_data_home_dir = /data/mysql/mysql$port/data
innodb_log_group_home_dir = /data/mysql/mysql$port/logs
innodb_data_file_path = ibdata1:1000M:autoextend
innodb_temp_data_file_path = ibtmp1:12M:autoextend innodb_buffer_pool_size = $innodbbufferpoolsize innodb_buffer_pool_instances =
#innodb_additional_mem_pool_size = 16M
innodb_log_file_size = 500M
innodb_log_buffer_size = 16M
innodb_log_files_in_group =
innodb_flush_log_at_trx_commit =
sync_binlog =
innodb_lock_wait_timeout =
innodb_sync_spin_loops =
innodb_max_dirty_pages_pct =
innodb_support_xa =
innodb_thread_concurrency =
innodb_thread_sleep_delay =
innodb_concurrency_tickets =
innodb_flush_method = O_DIRECT
innodb_file_per_table =
innodb_read_io_threads =
innodb_write_io_threads =
innodb_io_capacity = $innodbiocapacity
innodb_flush_neighbors =
innodb_purge_threads=$innodbpurgethreads
innodb_purge_batch_size =
innodb_old_blocks_pct=
innodb_change_buffering=all
innodb_stats_on_metadata=OFF
innodb_print_all_deadlocks =
performance_schema=$performanceschema
transaction_isolation = READ-COMMITTED
#innodb_force_recovery=
#innodb_fast_shutdown=
#innodb_status_output=
#innodb_status_output_locks=
#innodb_status_file = [mysqldump]
quick
max_allowed_packet = 128M [mysql]
no-auto-rehash
max_allowed_packet = 128M
prompt = '($environment)\u@\h:\p [\d]> '
default_character_set = utf8 [myisamchk]
key_buffer_size = 64M
sort_buffer_size = 512k
read_buffer = 2M
write_buffer = 2M [mysqlhotcopy]
interactive-timeout [mysqld_safe]
#malloc-lib= /usr/local/mysql/lib/mysql/libjemalloc.so
EOF

转自

python自动安装mysql5.7 - 桦仔 - 博客园
https://www.cnblogs.com/lyhabc/archive/2017/11/19/7859427.html

        # 调用示例
# python /tmp/installmysql.py -f /data/download/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz -P3306 -p123456 -b /tmp/createmycnf.sh create

python自动安装mysql5.7【转】的更多相关文章

  1. python自动安装mysql5.7

    python自动安装mysql5.7 python版本:python2.6 centos版本:centos6.9 mysql版本:mysql5.7.19 安装目录路径和数据目录路径都是固定,当然也可以 ...

  2. Python自动安装第三方类库

    Python在使用过程中会用到大量的第三方库,逐一手工去下载.安装比较繁琐.可以配置第三方镜像源并使用pip进行自动安装.这里推荐选择豆瓣的镜像源:http://pypi.douban.com/sim ...

  3. MySQL脚本自动安装mysql-5.6.15-linux-glibc2.5-x86_64.tar.gz

    脚本安装mysql-5.6.15-linux-glibc2.5-x86_64.tar.gz 先准备好数据文件的路径 softdir='/data/soft' 把脚本和tar包放在相应的路径下,其实就是 ...

  4. [转载]--用Python 自动安装软件

    脚本使用了  Python 2.3 + Com 对象,所以你的系统必须安装Python2.3或更高版本同时必须安装  Mark Hammond's Win32all 模块 (特别感谢Mark Hamm ...

  5. python自动安装python2.7

    #coding = utf-8 import os import sys if(os.getuid() == 0): pass else: print ("you are not root ...

  6. mysql5.7 在Centeros 6 下自动安装的shell脚本

    概述: 此脚本实现了在Centeros 6版本下自动安装mysql5.7到目录 /opt/mysql-5.7*并且做软连接映射到 /usr/local/mysql,自动修改root密码为:123456 ...

  7. python第三方库自动安装脚本

    #python第三方库自动安装脚本,需要在cmd中运行此脚本#BatchInstall.pyimport oslibs = {"numpy","matplotlib&qu ...

  8. Mysql5.7免编译版自动安装脚本

    一:readme: .此脚本仅仅适合于5.7免面编译安装版本. .安装是需自己选择mysql软件安装包:例如mysql--linux-glibc2.-x86_64.-linux-glibc2.-x86 ...

  9. 【Python】安装MySQLdb模块centos 6.1 宝塔Linux面板 MySQL5.6

    [Python]安装MySQLdb模块centos 6.1 宝塔Linux面板 MySQL5.6 总之是各种坑 先说一下,宝塔安装在centos 6.1 i368 也就是32位系统上的方法 https ...

随机推荐

  1. Postgresql 简单安装过程. Study From https://www.cnblogs.com/stulzq/p/7766409.html

    CentOS 下面安装 Postgresql. 的简要学习记录 1. 卸载CentOS上面自带的postgresql版本 rpm -e $(rpm -qa|grep postgre) 2. postg ...

  2. day5——Java 实现导出excel表 POI(转)

    1.首先下载poi-3.6-20091214.jar,下载地址如下: http://download.csdn.net/detail/evangel_z/3895051 2.Student.java ...

  3. poj2082 Terrible Sets(单调栈)

    Description Let N be the set of all natural numbers {0 , 1 , 2 , . . . }, and R be the set of all re ...

  4. Eclipse Job

    Job可以我们基于Eclipse的Java程序中,我们有很多种方式提供多任务的实现.熟悉Java的朋友立即会想到Java的Thread类,这是Java中使 用最多的一个实现多任务的类.Eclipse平 ...

  5. Spring定时服务QuartZ

    在JavaEE系统中,我们会经常用到定时任务,比如每天凌晨生成前天报表,每一小时生成汇总数据等等. 我们可以使用java.util.Timer结合java.util.TimerTask来完成这项工作, ...

  6. CentOS服务器配置SSH免密码登录

    由于工作需要,经常要登录到多台服务器远程操作,每次都是ssh user@host:port 再输入密码,时间长了,难免觉得乏味-- 故而从度娘那里扒来了一些让SSH免密码登录的办法,其实这也是使用Gi ...

  7. 【bzoj4765】 普通计算姬

    题意 给出一棵有根树,$n$个点每个都有一个点权.$m$组操作每次可以修改一个点权或者询问编号在区间$[l,r]$的点的子树权值和的和. Solution 我们对节点编号分块,每一块统计该块中的节点的 ...

  8. pi的求法 acos(-1.0)

    pi=acos(-1.0) https://www.luogu.org/problemnew/show/T4529 #include <cstdio> #include <cstdl ...

  9. SSM框架的搭建与测试

    关于框架的搭建无非就是 框架所依赖的jar包,然后就是关于各个框架的配置文件: 下面我们来看下不同层的依赖的jar包以及各个配置文件: 首先pojo这一层只需要依赖parent聚合工程 mapper层 ...

  10. Python学习笔记 - 实现探测Web服务质量

    #!/usr/bin/python3# _*_ coding:utf-8 _*_import sys, osimport timeimport pycurl url = "https://d ...