"Java Fundamentals" Java interacts with Windows systems

Guo Jia
Email: [Email protected]
Blog: http://blog.csdn.net/allenwells
Github:https://github.com/allenwell

A Java Execute cmd command

principle :

Process process = Runtime.getRuntime().exec("cmd order");

• CMD/C Cmdorder is the Close command window after executing the cmdorder command.
• cmd/k cmdorder The Command window is not closed after the Cmdorder command is executed.
• CMD/C start Cmdorder will open a new window and execute the cmdorder instruction, the original window will be closed.
• cmd/k start Cmdorder will open a new window and execute the cmdorder instruction, the original window will not be closed.

Note :

If there is only a cmd command in exec (), the command is executed directly without opening the command-line window;

Example :

The following example implements the ability to execute an extract jar package and send command line information to the Java graphical interface:

Process Process =NULL;Try{process = Runtime.getruntime (). EXEC ("Jar XVF"+ Jarinputfile.getpath ());}Catch(IOException e) {E.printstacktrace ();} InputStream InputStream = Process.getinputstream (); Reader reader =NewInputStreamReader (InputStream); BufferedReader BufferedReader =NewBufferedReader (reader);Try{ for(String s =""; (s = bufferedreader.readline ())! =NULL;) {Consoleinfo.append (S +"<br>");        } bufferedreader.close ();        Reader.close (); JLabel Consolelabel =NewJLabel (); Consolelabel.settext ("+ consoleinfo.tostring () +"); }}Catch(/E) {E.printstacktrace ();}

Note : The text display in Java Swing does not support the direct "\ n" line wrapping, so the "" tab is used to implement line breaks.

Two cmd output information redirection

The above program shows that after executing a command, the command line information output to the Java graphical interface, then how to implement real-time detection of Windows command line printing information and output it?

Implementation Method :

The Java System class has an out member variable called the standard output stream, which is used to print output to the screen. The problem described above is actually the output redirection problem of System.out.

System.out in Java The source code implementation is as follows:

    /** * Default input stream. */     Public Static FinalInputStream in;/** * Default output stream. */     Public Static FinalPrintStream out;/** * Default error output stream. */     Public Static FinalPrintStream err;Private Static FinalString LineSeparator;Private StaticProperties systemproperties;Static{err =NewPrintStream (NewFileOutputStream (Filedescriptor.err)); out =NewPrintStream (NewFileOutputStream (filedescriptor.out)); in =NewBufferedinputstream (NewFileInputStream (filedescriptor.in)); LineSeparator = System.getproperty ("Line.separator"); }

As can be seen from the above, System.out is a printstream. Just redirect it to where we need it, and the specific code is implemented as follows:

 PackageCom.allenwells.ui;ImportJava.awt.Color;ImportJava.awt.Dimension;ImportJava.io.OutputStream;ImportJava.io.PrintStream;ImportJavax.swing.JScrollPane;ImportJavax.swing.JTextPane;ImportJavax.swing.SwingUtilities;ImportJavax.swing.text.AbstractDocument;ImportJavax.swing.text.BadLocationException;ImportJavax.swing.text.Document;ImportJavax.swing.text.Element;ImportJavax.swing.text.Style;Importjavax.swing.text.StyleConstants;ImportJavax.swing.text.StyledDocument; Public  class consolepane extends jscrollpane{    Private Static Final LongSerialversionuid =1LPrivateJtextpane TextPane =NewJtextpane ();Private StaticConsolepane console =NULL; Public Static synchronizedConsolepanegetinstance()    {if(Console = =NULL) {console =NewConsolepane (); }returnConsole }Private Consolepane() {Setviewportview (TextPane);//Set up System.outPrintStream mysystemout =NewMyprintstream (System.out, Color.Black); System.setout (mysystemout);//Set up System.errPrintStream Mysystemerr =NewMyprintstream (System.err, color.red);        System.seterr (Mysystemerr); Textpane.seteditable (true); Setpreferredsize (NewDimension (640, -)); }/** * Returns The number of lines in the document. */    Private Final int Getlinecount()    {returnTextpane.getdocument (). Getdefaultrootelement (). Getelementcount (); }/** * Returns The start offset of the specified line. * * @param Line * The line * @return The start offset by the specified line, or -1 if the line is * invalid * /    Private int Getlinestartoffset(intLine) {Element lineelement = Textpane.getdocument (). Getdefaultrootelement (). GetElement (line);if(Lineelement = =NULL)return-1;Else            returnLineelement.getstartoffset (); }/** * Clear the number of travel characters in front of more than the number of lines */    Private void Replacerange(String str,intStartintEnd) {if(End < start) {Throw NewIllegalArgumentException ("End before start"); } Document doc = Textpane.getdocument ();if(Doc! =NULL)        {Try{if(docinstanceofAbstractdocument) {((abstractdocument) doc). Replace (start, End-start, str,NULL); }Else{Doc.remove (start, End-start); Doc.insertstring (Start, str,NULL); }            }Catch(Badlocationexception e) {Throw NewIllegalArgumentException (E.getmessage ()); }}} class Myprintstream extends PrintStream {PrivateColor foreground;//The font color used for output        /** * Constructs its own printstream * * @param out * can be passed into System.out or System. Err, actually does not work * @param foreground * Display Font color */Myprintstream (OutputStream out, Color foreground) {Super(Out,true);//Use automatic refresh             This. foreground = foreground; }/** * In this section, all the printing methods to call the bottom layer of the method * /         Public void Write(byte[] buf,intOffintLen) {FinalString message =NewString (buf, off, Len);/** Swing Non-interface thread how to access Components * /Swingutilities.invokelater (NewRunnable () { Public void Run()                {Try{Styleddocument doc = (styleddocument) textPane. GetDocument ();//Create a Style object and then set the style                        //AttributesStyle style = Doc.addstyle ("StyleName",NULL);//Foreground colorStyleconstants.setforeground (style, foreground);                    Doc.insertstring (Doc.getlength (), message, style); }Catch(Badlocationexception e) {//E.printstacktrace ();}//Make sure the last line was always visibleTextpane.setcaretposition (Textpane.getdocument (). GetLength ());//Keep The text area down to a certain line count                    intIdealline = Max;intMaxexcess = -;intExcess = Getlinecount ()-idealline;if(Excess >= maxexcess) {Replacerange ("",0, Getlinestartoffset (excess));        }                }            }); }    }}

How to use

new JPanel();ConsolePane consolePane = ConsolePane.getInstance();contentPanel.add(consolePane);

As shown below:

Appendix:

Here is a common cmd command:

2. gpedit.msc-– Group Policy
4. Sndrec32 ——-Recorder
6. Nslookup ——-IP Address detector
8. Explorer ——-Open Resource Manager
10. Logoff ——— Logoff command
12. Tsshutdn ——-60-second Countdown shutdown command
14. lusrmgr.msc--Native Users and Groups
16. services.msc-Local Service settings
18. oobe/msoobe/a--Check if XP is active
20. notepad--– Open Notepad
22. cleanmgr ——-Waste Finishing
24. net start messenger--Messenger Service
26. compmgmt.msc-Computer Management
28. net stop messenger-– stop messenger Service
30. Conf ——— – Start NetMeeting
32. Dvdplay--–dvd player
34. charmap--– Startup character Mapping table
36. diskmgmt.msc-Disk Management Utility
38. Calc ——— – Start Calculator
40. Dfrg.msc ——-Disk Defragmenter
42. Chkdsk.exe-–chkdsk disk Check
44. devmgmt.msc-Device Manager
46. regsvr32/u *.dll--Stop DLL file run
48. drwtsn32--System Doctor
50. rononce-p--15 seconds shutdown
52. DxDiag ——— checking DirectX information
54. Regedt32 ——-Registry Editor
56. msconfig.exe-System Configuration Utility
58. Rsop.msc ——-Group Policy result set
60. mem.exe--– Display Memory usage
62. regedit.exe--Registration Form
64. WINCHAT--–XP self-brought LAN chat
66. progman--– Program Manager
68. WINMSD ——— System Information
70. perfmon.msc--Computer Performance Monitoring Program
72. Winver ——— Check the Windows version
74. sfc/scannow-– Scan error and restore
76. taskmgr-– Task Manager (2000/xp/2003
78. Winver ——— Check the Windows version
80. wmimgmt.msc--Opening Windows Management Architecture (WMI)
82. Wupdmgr--–windows Update Program
84. Wscript--–windows Script Host Settings
86. Write ———-WordPad
88. WINMSD ——— System Information
90. Wiaacmgr ——-Scanner and Camera Wizard
92. WINCHAT--–XP self-brought LAN chat
94. mem.exe--– Display Memory usage
96. msconfig.exe-System Configuration Utility
98. Mplayer2 ——-Easy widnows Media Player
100. mspaint--– drawing board
102. MSTSC ———-Remote Desktop Connection
104. Mplayer2 ——-Media Player
106. magnify--– Magnifier Utility
108. MMC ———— Open the console
110. mobsync--– Synchronization Command
112. DxDiag ——— checking DirectX information
114. drwtsn32--System Doctor
116. devmgmt.msc-Device Manager
118. Dfrg.msc ——-Disk Defragmenter
120. diskmgmt.msc-Disk Management Utility
122. DCOMCNFG ——-Open System Component Services
124. DdeShare ——-turn on DDE sharing settings
126. Dvdplay--–dvd player
128. net stop messenger-– stop messenger Service
130. net start messenger--Messenger Service
132. notepad--– Open Notepad
134. Nslookup Tool Wizard for ——-network management
136. Ntbackup ——-system backup and restore
138. Narrator ——-Screen Narrator
140. ntmsmgr.msc--Mobile Storage Manager
142. ntmsoprq.msc-Mobile Storage Administrator Action Request
144. netstat-an--(TC) command Check interface
146. syncapp--– Create a Briefcase
148. sysedit--– System Configuration Editor
150. Sigverif ——-File Signature Validator
152. Sndrec32 ——-Recorder
154. shrpubw--– Creating a shared folder
156. secpol.msc-– Local Security Policy
158. Syskey ——— system encryption, once encrypted can not be solved, protect the Windows XP system dual Password
160. services.msc-Local Service settings
162. Sndvol32 ——-Volume Control program
164. sfc.exe--– System File Checker
166. Sfc/scannow-windows File Protection
168. Tsshutdn ——-60-second Countdown shutdown command
170. Tsshutdn ——-60-second Countdown shutdown command
172. TOURSTART--XP profile (roaming XP programs that appear after installation is complete)
174. taskmgr--– Task Manager
176. EVENTVWR ——-Event Viewer
178. Eudcedit ——-Character-font procedure
180. Explorer ——-Open Resource Manager
182. Packager ——-Object Wrapping Program
184. perfmon.msc--Computer Performance Monitoring Program
186. progman--– Program Manager
188. regedit.exe--Registration Form
190. Rsop.msc ——-Group Policy result set
192. Regedt32 ——-Registry Editor
194. rononce-p--15 seconds shutdown
196. regsvr32/u *.dll--Stop DLL file run
198. regsvr32/u zipfldr.dll--Cancel Zip support
200. Cmd.exe--–cmd Command Prompt
202. Chkdsk.exe-–chkdsk disk Check
204. certmgr.msc--Certificate Management Utility
206. Calc ——— – Start Calculator
208. charmap--– Startup character Mapping table
210. CLICONFG ——-SQL SERVER Client Network Utility
212. clipbrd--– Clipboard Viewer
214. Conf ——— – Start NetMeeting
216. compmgmt.msc-Computer Management
218. cleanmgr ——-Waste Finishing
220. ciadv.msc--Indexing Service Program
222. OSK ———— Open the On-screen keyboard
224. ODBCAD32 ——-ODBC data Source Manager
226. oobe/msoobe/a--Check if XP is active
228. lusrmgr.msc--Native Users and Groups
230. Logoff ——— Logoff command
232. IExpress ——-Trojan Bundle tool, System comes with
234. Nslookup ——-IP Address detector
236. fsmgmt.msc-– shared Folder Manager
238. utilman--– Utility Manager
240. gpedit.msc-– Group Policy

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

"Java Fundamentals" Java interacts with Windows systems