jwj 发布的文章

系统名称后面带个N的,代表移除了某些功能,例如:Windows Media Player, Groove Music, Movies & TV, Voice Recorder, Skype等
https://support.microsoft.com/en-us/help/3010081/media-feature-pack-for-windows-10-n-and-windows-10-kn-editions
名词解释
Datacenter数据中心版
Standard标准版
Professional专业版
Enterprise企业版
Education教育版
LTSB长期服务
Workstation工作站

Windows Server 版本 1709

操作系统版本KMS安装密钥
Windows Server Datacenter6Y6KB-N82V8-D8CQV-23MJW-BWTG6
Windows Server StandardDPCNP-XQFKJ-BJF7R-FRC8D-GF6G4

Windows Server 2016

操作系统版本密钥
Windows Server 2016 Datacenter(数据中心版)CB7KF-BWN84-R7R2Y-793K2-8XDDG
Windows Server 2016 Standard(标准版)WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY
Windows Server 2016 Essentials(基础版)JCKRF-N37P4-C2D82-9YXRT-4M63B

Windows 10 版本 1709

操作系统版本KMS安装密钥
Windows 10 Professional Workstation(工作站专业版)NRG8B-VKK3Q-CXVCJ-9G2XF-6Q84J
Windows 10 Professional Workstation N9FNHH-K3HBT-3W4TD-6383H-6XYWF

Windows 10

操作系统版本密钥
Windows 10 ProfessionalW269N-WFGWX-YVC9B-4J6C9-T83GX
Windows 10 Professional NMH37W-N47XK-V7XM9-C7227-GCQG9
Windows 10 EnterpriseNPPR9-FWDCX-D2C8J-H872K-2YT43
Windows 10 Enterprise NDPH2V-TTNVB-4X9Q3-TJR4H-KHJW4
Windows 10 EducationNW6C2-QMPVW-D7KKK-3GKT6-VCFB2
Windows 10 Education N2WH4N-8QGBV-H22JP-CT43Q-MDWWJ
Windows 10 Enterprise 2015 LTSBWNMTR-4C88C-JK8YV-HQ7T2-76DF9
Windows 10 Enterprise 2015 LTSB N2F77B-TNFGY-69QQF-B8YKP-D69TJ
Windows 10 Enterprise 2016 LTSBDCPHK-NFMTC-H88MJ-PFHPY-QJ4BJ
Windows 10 Enterprise 2016 LTSB NQFFDN-GRT3P-VKWWX-X7T3R-8B639

Windows Server 2012 R2 and Windows 8.1

操作系统版本密钥
Windows 8.1 ProfessionalGCRJD-8NW9H-F2CDX-CCM8D-9D6T9
Windows 8.1 Professional NHMCNV-VVBFX-7HMBH-CTY9B-B4FXY
Windows 8.1 EnterpriseMHF9N-XY6XB-WVXMC-BTDCT-MKKG7
Windows 8.1 Enterprise NTT4HM-HN7YT-62K67-RGRQJ-JFFXW
Windows Server 2012 R2 Server StandardD2N9P-3P6X9-2R39C-7RTCD-MDVJX
Windows Server 2012 R2 DatacenterW3GGN-FT8W3-Y4M27-J84CP-Q3VJ9
Windows Server 2012 R2 EssentialsKNC87-3J2TX-XB4WP-VCPJV-M4FWM

Windows Server 2012 and Windows 8

操作系统版本密钥
Windows 8 ProfessionalNG4HW-VH26C-733KW-K6F98-J8CK4
Windows 8 Professional NXCVCF-2NXM9-723PB-MHCB7-2RYQQ
Windows 8 Enterprise32JNW-9KQ84-P47T8-D8GGY-CWCK7
Windows 8 Enterprise NJMNMF-RHW7P-DMY6X-RF3DR-X2BQT
Windows Server 2012BN3D2-R7TKB-3YPBD-8DRP2-27GG4
Windows Server 2012 N8N2M2-HWPGY-7PGT9-HGDD8-GVGGY
Windows Server 2012 Single Language2WN2H-YGCQR-KFX6K-CD6TF-84YXQ
Windows Server 2012 Country Specific4K36P-JN4VD-GDC6V-KDT89-DYFKP
Windows Server 2012 Server StandardXC9B7-NBPP2-83J2H-RHMBY-92BT4
Windows Server 2012 MultiPoint StandardHM7DN-YVMH3-46JC3-XYTG7-CYQJJ
Windows Server 2012 MultiPoint PremiumXNH6W-2V9GX-RGJ4K-Y8X6F-QGJ2G
Windows Server 2012 Datacenter48HP8-DN98B-MYWDG-T2DCC-8W83P

Windows 7 and Windows Server 2008 R2

操作系统版本密钥
Windows 7 ProfessionalFJ82H-XT6CR-J8D7P-XQJJ2-GPDD4
Windows 7 Professional NMRPKT-YTG23-K7D7T-X2JMM-QY7MG
Windows 7 Professional EW82YF-2Q76Y-63HXB-FGJG9-GF7QX
Windows 7 Enterprise33PXH-7Y6KF-2VJC9-XBBR8-HVTHH
Windows 7 Enterprise NYDRBP-3D83W-TY26F-D46B2-XCKRJ
Windows 7 Enterprise EC29WB-22CC8-VJ326-GHFJW-H9DH4
Windows Server 2008 R2 Web6TPJF-RBVHG-WBW2R-86QPH-6RTM4
Windows Server 2008 R2 HPC editionTT8MH-CG224-D3D7Q-498W2-9QCTX
Windows Server 2008 R2 StandardYC6KT-GKW9T-YTKYR-T4X34-R7VHC
Windows Server 2008 R2 Enterprise489J6-VHDMP-X63PK-3K798-CPX3Y
Windows Server 2008 R2 Datacenter74YFP-3QFB3-KQT8W-PMXWJ-7M648
Windows Server 2008 R2 for Itanium-based SystemsGT63C-RJFQ3-4GMB6-BRFB9-CB83V

Windows Vista and Windows Server 2008

操作系统版本密钥
Windows Vista BusinessYFKBB-PQJJV-G996G-VWGXY-2V3X8
Windows Vista Business NHMBQG-8H2RH-C77VX-27R82-VMQBT
Windows Vista EnterpriseVKK3X-68KWM-X2YGT-QR4M6-4BWMV
Windows Vista Enterprise NVTC42-BM838-43QHV-84HX6-XJXKV
Windows Web Server 2008WYR28-R7TFJ-3X2YQ-YCY4H-M249D
Windows Server 2008 StandardTM24T-X9RMF-VWXK6-X8JC9-BFGM2
Windows Server 2008 Standard without Hyper-VW7VD6-7JFBR-RX26B-YKQ3Y-6FFFJ
Windows Server 2008 EnterpriseYQGMW-MPWTJ-34KDK-48M3W-X4Q6V
Windows Server 2008 Enterprise without Hyper-V39BXF-X8Q23-P2WWT-38T2F-G3FPG
Windows Server 2008 HPCRCTX3-KWVHP-BR6TB-RB6DM-6X7HP
Windows Server 2008 Datacenter7M67G-PC374-GR742-YH8V4-TCBY3
Windows Server 2008 Datacenter without Hyper-V22XQ2-VRXRG-P8D42-K34TD-G3QQC
Windows Server 2008 for Itanium-Based Systems4DWFP-JF3DJ-B7DTH-78FJB-PDRHK

Office 2016

软件密钥
Office Professional Plus 2016XQNVK-8JYDB-WJ9W3-YJ8YR-WFG99
Office Standard 2016JNRGM-WHDWX-FJJG3-K47QV-DRTFM
Project Professional 2016YG9NW-3K39V-2T3HJ-93F3Q-G83KT
Project Standard 2016GNFHQ-F6YQM-KQDGJ-327XX-KQBVC
Visio Professional 2016PD3PC-RHNGV-FXJ29-8JK7D-RJRJK
Visio Standard 20167WHWN-4T7MP-G96JF-G33KR-W8GF4
Access 2016GNH9Y-D2J4T-FJHGG-QRVH7-QPFDW
Excel 20169C2PK-NWTVB-JMPW8-BFT28-7FTBF
OneNote 2016DR92N-9HTF2-97XKM-XW2WJ-XW3J6
Outlook 2016R69KK-NTPKF-7M3Q4-QYBHW-6MT9B
PowerPoint 2016J7MQP-HNJ4Y-WJ7YM-PFYGF-BY6C6
Publisher 2016F47MM-N3XJP-TQXJ9-BP99D-8837K
Skype for Business 2016869NQ-FJ69K-466HW-QYCP2-DDBV6
Word 2016WXY84-JN2Q9-RBCCQ-3Q3J3-3PFJ6

Office 2013

软件密钥
Office 2013 Professional PlusYC7DK-G2NP3-2QQC3-J6H88-GVGXT
Office 2013 StandardKBKQT-2NMXY-JJWGP-M62JB-92CD4
Project 2013 ProfessionalFN8TT-7WMH6-2D4X9-M337T-2342K
Project 2013 Standard6NTH3-CW976-3G3Y2-JK3TX-8QHTT
Visio 2013 ProfessionalC2FG9-N6J68-H8BTJ-BW3QX-RM3B3
Visio 2013 StandardJ484Y-4NKBF-W2HMG-DBMJC-PGWR7
Access 2013NG2JY-H4JBT-HQXYP-78QH9-4JM2D
Excel 2013VGPNG-Y7HQW-9RHP7-TKPV3-BG7GB
InfoPath 2013DKT8B-N7VXH-D963P-Q4PHY-F8894
Lync 20132MG3G-3BNTT-3MFW9-KDQW3-TCK7R
OneNote 2013TGN6P-8MMBC-37P2F-XHXXK-P34VW
Outlook 2013QPN8Q-BJBTJ-334K3-93TGY-2PMBT
PowerPoint 20134NT99-8RJFH-Q2VDH-KYG2C-4RD4F
Publisher 2013PN2WF-29XG2-T9HJ7-JQPJR-FCXK4
Word 20136Q7VD-NX8JD-WJ2VH-88V73-4GBJ7

Office 2010

软件密钥
Office Professional Plus 2010VYBBJ-TRJPB-QFQRF-QFT4D-H3GVB
Office Standard 2010V7QKV-4XVVR-XYV4D-F7DFM-8R6BM
Office Home and Business 2010D6QFG-VBYP2-XQHM7-J97RH-VVRCK
Access 2010V7Y44-9T38C-R2VJK-666HK-T7DDX
Excel 2010H62QG-HXVKF-PP4HP-66KMR-CW9BM
SharePoint Workspace 2010QYYW6-QP4CB-MBV6G-HYMCJ-4T3J4
InfoPath 2010K96W8-67RPQ-62T9Y-J8FQJ-BT37T
OneNote 2010Q4Y4M-RHWJM-PY37F-MTKWH-D3XHX
Outlook 20107YDC2-CWM8M-RRTJC-8MDVC-X3DWQ
PowerPoint 2010RC8FX-88JRY-3PF7C-X8P67-P4VTT
Project Professional 2010YGX6F-PGV49-PGW3J-9BTGG-VHKC6
Project Standard 20104HP3K-88W3F-W2K3D-6677X-F9PGB
Publisher 2010BFK7F-9MYHM-V68C7-DRQ66-83YTP
Word 2010HVHB3-C6FV7-KQX9W-YQG79-CRY7T
Visio Premium 2010D9DWC-HPYVV-JGF4P-BTWQB-WX8BJ
Visio Professional 20107MCW8-VRQVK-G677T-PDJCM-Q8TCP
Visio Standard 2010767HD-QGMWX-8QTDB-9G3R2-KHFGJ

参考资料:

Server/Windows:https://docs.microsoft.com/zh-cn/windows-server/get-started/kmsclientkeys

前言

写程序的时候,难免需要用到自动任务,例如:超时订单自动取消。
刚开始我用crontab来实现,但发现会出问题:

  • 权限问题:程序运行时,会生成日志文件,但crontab和web服务的运行用户不一样,导致日志文件的所有者不一致,导致权限问题,最终使程序无法正常运行
  • 稳定性:进程挂了后,不能自动重启,导致任务不能正常进行,造成一系列任务超时不更新问题。

最后找到了一个解决问题,就是使用Supervisor来运行任务,完美解决了以上问题,并且方便了任务管理。

以下内容都是参考官方教程来编写,并且在完善当中。

软件安装

这里提供两种安装方法,分别是使用 easy_install 安装和使用 yum 安装

使用 easy_install 安装

1.安装supervisor

easy_install supervisor

2.生成配置文件

echo_supervisord_conf > /etc/supervisord.conf

3.生成supervisord.service服务文件

curl https://raw.githubusercontent.com/Supervisor/initscripts/master/centos-systemd-etcs > /lib/systemd/system/supervisord.service

4.修改supervisord.service文件权限

chmod +x /lib/systemd/system/supervisord.service

使用 yum 安装

yum install supervisor

Centos8系统可以使用dnf包管理器来安装

dnf install supervisor

系统服务管理

启用服务

启用服务后,会跟随系统开机自启

systemctl enable supervisord

返回结果

Created symlink from /etc/systemd/system/multi-user.target.wants/supervisord.service to /usr/lib/systemd/system/supervisord.service.

禁用服务

禁用服务后,不会跟随系统开机自启

systemctl disable supervisord

启动服务

也就是启动 supervisor

systemctl start supervisord

查看服务状态

也就是查看 supervisor 运行状态

systemctl status supervisord

停止服务

systemctl stop supervisord

重启服务

systemctl start supervisord

配置文件解释

/etc/supervisord.conf:

; supervisor 示例配置文件
;
; 有关配置文件的更多信息,请参阅:
; http://supervisord.org/configuration.html
;
; 提示:
;  - Shell expansion ("~" or "$HOME") is not supported.  Environment
;    variables can be expanded using this syntax: "%(ENV_HOME)s".
;  - Quotes around values are not supported, except in the case of
;    the environment= options as shown below.
;  - Comments must have a leading space: "a=b ;comment" not "a=b;comment".
;  - Command will be truncated if it looks like a config file comment, e.g.
;    "command=bash -c 'foo ; bar'" will truncate to "command=bash -c 'foo ".

[unix_http_server]
file=/tmp/supervisor.sock   ; 套接字(socket)文件的路径
;chmod=0700                 ; 套接字(socket)文件的权限 (default 0700)
;chown=nobody:nogroup       ; 套接字(socket)文件的所有组和所有者
;username=user              ; 用户名,在终端管理Supervisor时使用(默认没有用户名)
;password=123               ; 密码,在终端管理Supervisor时使用(默认没有密码)

;[inet_http_server]         ; inet (TCP) 服务,用于通过web管理任务
;port=127.0.0.1:9001        ; 监听地址(IP地址:端口), *:port 表示监听所有IP
;username=user              ; 用户名,在web管理Supervisor时使用(默认没有用户名)
;password=123               ; 密码,在web管理Supervisor时使用(默认没有密码)

[supervisord]
logfile=/tmp/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10           ; # of main logfile backups; 0 means none, default 10
loglevel=info                ; 日志等级,默认为:info. 其它选项: debug,warn,trace
pidfile=/tmp/supervisord.pid ; supervisord pidfile; default supervisord.pid
nodaemon=false               ; start in foreground if true; default false
minfds=1024                  ; min. avail startup file descriptors; default 1024
minprocs=200                 ; min. avail process descriptors;default 200
;umask=022                   ; process file creation umask; default 022
;user=chrism                 ; default is current user, required if root
;identifier=supervisor       ; supervisord identifier, default is 'supervisor'
;directory=/tmp              ; default is not to cd during start
;nocleanup=true              ; don't clean up tempfiles at start; default false
;childlogdir=/tmp            ; 'AUTO' child log dir, default $TEMP
;environment=KEY="value"     ; key value pairs to add to environment
;strip_ansi=false            ; strip ansi escape codes in logs; def. false

; The rpcinterface:supervisor section must remain in the config file for
; RPC (supervisorctl/web interface) to work.  Additional interfaces may be
; added by defining them in separate [rpcinterface:x] sections.

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

; The supervisorctl section configures how supervisorctl will connect to
; supervisord.  configure it match the settings in either the unix_http_server
; or inet_http_server section.

[supervisorctl]
serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket
;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username=chris              ; should be same as in [*_http_server] if set
;password=123                ; should be same as in [*_http_server] if set
;prompt=mysupervisor         ; cmd line prompt (default "supervisor")
;history_file=~/.sc_history  ; use readline history if available

; The sample program section below shows all possible program subsection values.
; Create one or more 'real' program: sections to be able to control them under
; supervisor.

;[program:theprogramname]
;command=/bin/cat              ; 需要执行的命令(相对使用PATH,可以使用参数)
;process_name=%(program_name)s ; 进程名称表达式(默认:%(program_name)s)
;numprocs=1                    ; 要启动的进程数(默认:1)
;directory=/tmp                ; 工作目录,执行命令前,转到该目录(默认:无)
;umask=022                     ; 进程权限掩码(默认:无)
;priority=999                  ; 优先级 (默认:999)
;autostart=true                ; 跟随supervisord自动启动 (默认:是)
;startsecs=1                   ; # of secs prog must stay up to be running (def. 1)
;startretries=3                ; max # of serial start failures when starting (default 3)
;autorestart=unexpected        ; when to restart if exited after running (def: unexpected)
;exitcodes=0,2                 ; 'expected' exit codes used with autorestart (default 0,2)
;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false             ; send stop signal to the UNIX process group (default false)
;killasgroup=false             ; SIGKILL the UNIX process group (def false)
;user=chrism                   ; 设置命令运行用户
;redirect_stderr=true          ; redirect proc stderr to stdout (default false)
;stdout_logfile=/a/path        ; 终端日志保存文件(执行命令一般都会有内容信息返回),默认值:AUTO,其它选项:NONE
;stdout_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10     ; # of stdout logfile backups (0 means none, default 10)
;stdout_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
;stdout_events_enabled=false   ; emit events on stdout writes (default false)
;stderr_logfile=/a/path        ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10     ; # of stderr logfile backups (0 means none, default 10)
;stderr_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
;stderr_events_enabled=false   ; emit events on stderr writes (default false)
;environment=A="1",B="2"       ; process environment additions (def no adds)
;serverurl=AUTO                ; override serverurl computation (childutils)

; The sample eventlistener section below shows all possible eventlistener
; subsection values.  Create one or more 'real' eventlistener: sections to be
; able to handle event notifications sent by supervisord.

;[eventlistener:theeventlistenername]
;command=/bin/eventlistener    ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1                    ; number of processes copies to start (def 1)
;events=EVENT                  ; event notif. types to subscribe to (req'd)
;buffer_size=10                ; event buffer queue size (default 10)
;directory=/tmp                ; directory to cwd to before exec (def no cwd)
;umask=022                     ; umask for process (default None)
;priority=-1                   ; the relative start priority (default -1)
;autostart=true                ; start at supervisord start (default: true)
;startsecs=1                   ; # of secs prog must stay up to be running (def. 1)
;startretries=3                ; max # of serial start failures when starting (default 3)
;autorestart=unexpected        ; autorestart if exited after running (def: unexpected)
;exitcodes=0,2                 ; 'expected' exit codes used with autorestart (default 0,2)
;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false             ; send stop signal to the UNIX process group (default false)
;killasgroup=false             ; SIGKILL the UNIX process group (def false)
;user=chrism                   ; setuid to this UNIX account to run the program
;redirect_stderr=false         ; redirect_stderr=true is not allowed for eventlisteners
;stdout_logfile=/a/path        ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10     ; # of stdout logfile backups (0 means none, default 10)
;stdout_events_enabled=false   ; emit events on stdout writes (default false)
;stderr_logfile=/a/path        ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10     ; # of stderr logfile backups (0 means none, default 10)
;stderr_events_enabled=false   ; emit events on stderr writes (default false)
;environment=A="1",B="2"       ; process environment additions
;serverurl=AUTO                ; override serverurl computation (childutils)

; The sample group section below shows all possible group values.  Create one
; or more 'real' group: sections to create "heterogeneous" process groups.

;[group:thegroupname]
;programs=progname1,progname2  ; each refers to 'x' in [program:x] definitions
;priority=999                  ; the relative start priority (default 999)

; The [include] section can just contain the "files" setting.  This
; setting can list multiple files (separated by whitespace or
; newlines).  It can also contain wildcards.  The filenames are
; interpreted as relative to this file.  Included files *cannot*
; include files themselves.

;[include]
;files = relative/directory/*.ini

Supervisor命令

1.重启任务

重启单个任务
supervisorctl restart 任务名
重启多个任务
supervisorctl restart 任务名1 任务名2 任务名3 任务名...
重启群组内的所有任务
supervisorctl restart 群组名:*
重启所有任务
supervisorctl restart all

2.启动任务

启动单个任务
supervisorctl start 任务名
启动多个任务
supervisorctl start 任务名1 任务名2 任务名3 任务名...
启动群组内的所有任务
supervisorctl start 群组名:*
启动所有任务
supervisorctl start all

3.任务状态

查看单个任务
supervisorctl status 任务名
查看多个任务
supervisorctl status 任务名1 任务名2 任务名3 任务名...
查看群组内的所有任务
supervisorctl status 群组名:*
查看所有任务
supervisorctl status all

4.停止任务

停止单个任务
supervisorctl stop 任务名
停止多个任务
supervisorctl stop 任务名1 任务名2 任务名3 任务名...
停止群组内的所有任务
supervisorctl stop 群组名:*
停止所有任务
supervisorctl stop all

5.重新加载配置

重新加载配置文件并重启所有任务
supervisorctl reload
重新加载配置文件并重启配置有变动的任务(适合只更新单个任务的配置,但又不想重启所有任务的情况)
supervisorctl reread
supervisorctl update

6.查看終端日志

查看任务的实时执行情况(相当于直接在终端中执行,可以查看到实时的终端信息输出)
supervisorctl tail -f 任务名
查看最后100字节日志
supervisorctl tail -100 任务名
查看最后1600字节错误日志
supervisorctl tail 任务名 stderr
以前台模式连接到进程
supervisorctl fg 任务名

做的项目多了,总会遇到一些需要涉及需要用到地图坐标的。
既然有坐标,那肯定又得涉及位置距离。
例如我们平时使用美团,想搜索附近的美食店,这功能很方便是不是?
希望下面的经验能给你帮助,让你少走些弯路,同时自己做个笔记,方便自己。
毕竟老了,有些东西很快就自己也忘记了,也需要笔记来回忆~

数据库表结构

CREATE TABLE `markers` (
  `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT '主键ID' ,
  `name` VARCHAR( 60 ) NOT NULL COMMENT '标记名称' ,
  `address` VARCHAR( 80 ) NOT NULL COMMENT '标记地址' ,
  `lat` FLOAT( 10, 6 ) NOT NULL COMMENT '纬度' ,
  `lng` FLOAT( 10, 6 ) NOT NULL COMMENT '经度'
) ENGINE = InnoDB COMMENT = '标记表' ;

数据库表数据

INSERT INTO `markers` (`name`, `address`, `lat`, `lng`) VALUES ('北京市天安门','北京市东城区东长安街','39.915599','116.402687');
INSERT INTO `markers` (`name`, `address`, `lat`, `lng`) VALUES ('广州华立科技职业学院','广东省广州市增城广州华立科技园华立路7号','23.248335','113.871302');
INSERT INTO `markers` (`name`, `address`, `lat`, `lng`) VALUES ('韶关市风采楼','广东省韶关市浈江区风采路34号','24.813028','113.606039');

SQL语句

以下是基于半正矢公式 a = sin²(Δφ/2) + cos φ1 ⋅ cos φ2 ⋅ sin²(Δλ/2)的SQL查询语句。

  • 6371是地球的半径,单位:公里。如果想以英里搜索,将6371换成3959即可。
  • 39.915599是搜索点中心纬度(例如想搜索北京天安门附近的标记点,则这里就是北京天安门的纬度)
  • 116.402687是搜索点中心经度(例如想搜索北京天安门附近的标记点,则这里就是北京天安门的经度)
  • distance字段是标记点与搜索点中心的距离,单位:公里(如果地球半径是英里,则这里也是英里)
  • 25是范围,表示搜索出搜索中心点25公里以内的标记点
SELECT `id` , `name`
    , 6371 * acos(cos(radians(39.915599)) * cos(radians(`lat`)) * cos(radians(`lng`) - radians(116.402687)) + sin(radians(39.915599)) * sin(radians(`lat`))) AS `distance`
FROM `markers`
HAVING `distance` < 25
ORDER BY `distance`
LIMIT 0, 20;

查询结果

从以下结果能看出,还是有些误差的,两个点坐标一样,距离应该是0的。但误差较小,问题不大吧,嘿嘿。

idnamedistance
1北京市天安门0.00009493529796600342

来自:https://developers.google.com/maps/articles/phpsqlsearch_v3#findnearsql

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