popsocket uses

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Java uses POI to generate Excel tables

= sex;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;} Public String Getgrade () {return grade;} public void Setgrade (String grade) {This.grade = grade;}}In the Controller class, add the export Excel interface as follows/** * National Network data Export * @param request * @param response */@RequestMapping ("/exportgwdatamanagelist") public void Exportgwdatamanag EList (HttpServletRequest request, httpservletresponse response) {try{list  The page

Java uses URLs to read pictures from the network

ImportJava.io.File;ImportJava.io.FileOutputStream;ImportJava.io.InputStream;ImportJava.net.URL; Public classDownloadimagenetwork { Public Static voidMain (string[] args) {Try{URL URL=NewURL ("Http://www.baidu.com/img/logo_gif_be7507c6c688ba2bd085da2ad1015e7d.gif?v=19489737.gif"); InputStream ins=Url.openstream (); File File=NewFile ("C:\\test\\logo.gif"); if(!file.exists ()) {File.createnewfile (); } FileOutputStream Fos=Newfileoutputstream (file); byte[] buffer =New byte[1024]; intHa

Java uses Freemarker to generate Word documents

1. Raw MaterialsOpen source jar Package Freemarker, Eclipse, a copy of the template Word document2. First design the template Word documentIn general, the format of the Word document that is output by the program is fixed, for example, to create a table, to write the table's title, the contents of the table are labeled with different marks, and after word is designed, save the Word document as an XML file (Note: Only word2003 versions are available), Open the file using the XML tool, replace the

It's cool! Python uses 37 lines of code to create its own music player, attached to the source

(Listofsongs[index])Pygame.mixer.music.play ()Updatelabel ()def previoussong (event):Global indexIf index > 0:Index-= 1Elseindex = Len (listofsongs)-1Pygame.mixer.music.load (Listofsongs[index])Pygame.mixer.music.play ()Updatelabel ()def stopsong (event):Pygame.mixer.music.stop ()V.set ("")Update the currently playing song nameDef Updatelabel ():Global indexV.set (Realnames[index]):Small series have their own Python learning Exchange group, if you want to learn, you can add: 588+090+942 Whether

Java uses the DateFormat date format method to determine whether the user is logged on for the first time today (relatively simple)

Last_login_time from Scpn_user where user_id= "+user.getuserid ();p rivate jdbctemplate jdbctemplate;date dt= Jdbctemplate.queryforobject (internaltimestring, java.util.Date.class);//Gets the current time of the system date Time=new date (); String s;if (dt==null) {s= "";} else {s = dateformat.getdateinstance (). Format (dt);} String t= dateformat.getdateinstance (). Format (time),//formats the current system time and the user's last logon date to determine if it is the same day if (!s.equals (

Spring uses annotation methods to inject multiple cases

At present Spring+netty development way so hot, want to register Netty spring components must be used in a number of ways, I can't help but want to spit groove obviously so common demand online related blog are less very, here give spring use annotation to inject many examples of way: On classes that require multiple calls, add the@Scope("prototype") In the injection, can not be used directly @Autowired , otherwise injected or singleton, need to use the factory, the simplest is to use@A

Spring Boot uses the Swagger UI

Introducing POM Dependencies: Dependency> groupId>Io.springfoxgroupId> Artifactid>Springfox-swagger2Artifactid> version>2.7.0version> Dependency> Dependency> groupId>Io.springfoxgroupId> Artifactid>Springfox-swagger-uiArtifactid> version>2.7.0version> Dependency>To GitHub https://github.com/swagger-api/swagger-ui to download the project, the Dist directory is copied and placed directly into the resource

Eclipse uses JavaFX to write a helloworkld

Public voidStart (Stage primarystage) {primarystage.settitle ("Hello world!"); Button btn=NewButton (); Btn.settext ("Say ' Hello World '"); Btn.setonaction (NewEventhandler() {@Override Public voidhandle (ActionEvent event) {System.out.println ("Helloworld!"); } }); Stackpane Root=NewStackpane (); Root.getchildren (). Add (BTN); Primarystage.setscene (NewScene (Root, 300, 250)); Primarystage.show (); } }Note that there is a gtk-message

Java uses reflection to convert Pojo to JSON objects

JSON object + * @paramCLS A * @paramobj the * @return + */ - Public StaticJsonobject Getjson (classcls, Object obj) { $Jsonobject JSON =NewJsonobject (); $field[] Fieldarray =cls.getdeclaredfields (); - for(Field field:fieldarray) { -String FieldName =field.getname (); theString methodName = "Get" + fieldname.substring (0, 1). toUpperCase () + fieldname.substring (1); - Try {WuyiMethod method =Cls.getmethod (methodName); theObject fieldobject = Meth

Some uses of C + + on string

Eletechar (string STR,Charch) {Str.erase (remove_if (Str.begin (), Str.end (), bind2nd (equal_toChar>(), ch)), str.end ()); } voidTeststring::testreplace () {stringstr ="abcdef"; stringStrsub ="AB"; Str.replace (Str.find (strsub), Strsub.size (),"CD"); coutEndl; } BOOLTeststring::startwith (Const string STR,Const stringStrstart) { if(Str.empty () | |Strstart.empty ()) { return false; } returnStr.compare (0, Strstart.size (), strstart) = =0?true:false; } BOOLTeststr

Some uses of shell grep

#1, total number of statistical characters#统计系统中不允许登录的用户数Grep-c ' Nologin '/etc/passwd#2, case-insensitive lookup of all lines of the specified character;Grep-i ' Good ' 9.txt#3, print the line and line number of the specified character;Grep-n "Good" 9.txt#4, lines that do not print the specified charactersGrep-v "Good" 9.txt#5, printing begins with a character good, followed by a line of numbersgrep "good[0-9]" 9.txt#6, lines that match G or Ggrep "[Gg]ood" 9.txt#7, display the line at the begi

Some uses of Shell awk

' begin{ofs=fs= ': '} nr==fnr{a[$1]=$2}nr>fnr{$2=a[$1];p rint >> "/tmp/passwd"} '/etc/shadow/etc/passwd#12, awk count Server Status connections:Netstat-an |awk '/tcp/{s[$NF]++} END {for (a in s) {print A,s[a]}} ' Netstat-an |awk '/tcp/{print $NF} ' |Sort | Uniq-c#13, get the IP address of the eth0Ifconfig eth0|grep "Bcast" |awk ' {print $} ' | Awk-f: ' {print $} '#14, add output at the beginning and end of the output#在所有行添加列名name, Shell, add "Blue,/bin/nosh" to the last lineAwk-f ': ' BEGIN {pr

Linux uses cmakelists to compile programs or generate library files

#set CMake minimum versionCmake_minimum_required (VERSION 2.8)#set the project nameSET (project_name image_test_01)#Build a projectPROJECT (${project_name})#Find OpenCV Libraryfind_package (OpenCV REQUIRED) include_directories (${opencv_include_dirs})#Print debugging InformationMESSAGE (STATUS"Project: ${project_name}") MESSAGE (STATUS"OpenCV Library Status:") MESSAGE (STATUS"version: ${opencv_version}") MESSAGE (STATUS"libraries: ${opencv_libs}") MESSAGE (STATUS"include path: ${opencv_include_d

Linux frequently uses commands-rights management commands-other rights management commands

Command name: ChownEnglish: Change file ownershipCommand path:/bin/chownSyntax: chown [user] [file or folder]Description of the function: Change the file or folder of the entire personExample: Chown Shenchao FengjieChange the file Fengjie the whole person is ShenchaoCommand name: CHGRPEnglish: Change file group ownershipCommand path:/BIN/CHGRPSyntax: chgrp [user] [file or folder]Function Description: Change the group to which the file or folder belongsExample: Chown lampbrother FengjieChange fil

Linux uses Mutt to send mail/attachments

" [emailprotected] Add multiple Attachmentsecho "Test" | mutt -s "web backup" -a /mysql.tar.gz -a /web.tar.gz [emailprotected]-S "mysql backup" message parameters and title-a/mysql.tar.gz parameters and paths for sending attachmentsRead Mail.txt content for the message content, content must be UTF8 encoded, otherwise garbled3. Set the senderEditing a configuration filevi/etc/MuttrcAdd the following to prevent it from being used as junk e-mailset from="[emailprotected]"set use_from=yesset envelop

Eclipse most often uses shortcut key summary

the newly opened tab.Otherwise, this newly opened tab willWill be recorded in history, and will be opened again the next time you come back here.5.ctrl+alt+hIf you want to know how a class's methods are called by those other classes, check this method name. Then press "Ctrl+alt+h". Eclipse will show which methods are called by this method. Finally, a call tree is generated.mnemonic : "H"---> "Hierarchy"---> "Call hierarchy"6. control-q: Go back to the last editing place. This shortcut is also

Shell uses shell scripts to publish the project

generally set to bash soft chain, in the general Linux system (such as Redhat), using the SH call execution script is equivalent to open bash POSIX standard mode, that is to say/bin/sh equivalent to/bin/bash--posix.2.echo $1:echo is used to print in streets, which represents the first parameter passed inStep three: Execute the shell scriptSH publish.sh HospitalExtracurricular topics:1. If you want to use the same as the boot tomcal./startup.sh boot then you need to execute the command before ex

Linux uses local Yum source and package management

Beagle #删除beagle PackageYum Remove xscreen* Remove the package beginning with XscreenYum groupremove Xfce deletes all packages within a XFCE groupClear PackageYum Clean Packages #清除遗留在缓存里的包文件Yum Clean metadata #清除遗留在缓存里的元数据Yum Clean Headers #清除遗留在缓存里的头文件Yum Clean all #清除元数据, header files and package filesRPM Install soft Sister bagRPM-IVH rpmforge-release-*.rpmRPM-IVH http://ftp************.rpmRPM Upgrade PackageRPM-UHV *.rpmRemove PackageRpm-e Rpmforge-releaseRPM-E--nodeps Rpmforge-releaseFind

Vim often uses shortcut keys and keyboard diagrams

consecutivelyDD-delete a whole line ndd-delete the down n rows of the cursorD1G-delete the line from the cursor to the first line DG-delete the line from the cursor to the last rowd$-delete cursor at end of line D0-delete cursor at beginning of rowYY-the line where the copy cursor is NYY-the next n line where the copy cursor is locatedY1G-Copy the current line to the first line YG-Copy the current line to the last rowY0-Copy current cursor to beginning y$-copy current cursor to end of lineP-pas

Linux uses nameless pipes to read and write files

1 What the pipeline is:Pipes everyone knows that there are two ends, at which end is used to read one end to write, the output of the end as the input of the other end.2 function prototypesint pipe (int pipefd[2]);//The two ends of the argument represented separately3 Example: One end of the pipeline as the writing of the other end as a read-father process implementation1#include 2#include 3#include 4 5 intMain ()6 {7 pid_t pid;8 inttemp;9 intpipedes[2];Ten Chars[ -]="Letgo"; One

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