Java runtime.getruntime(cmd.exe C call the system script/command precautions

Incorrect method:

// Cpuid
Private Static final string cpuid = "dmidecode-T processor | grep 'id' | head-1 ";

PROCESS p = runtime.getruntime(cmd.exe C (puid );

Cause: it will not be parsed again, and the MPs queue is invalid.

 

The correct method:

In Linux:

String [] command = {"/bin/sh", "-c", (puid };

Process PS = runtime.getruntime(cmd.exe C (command );

Windows:

String [] command = {"cmd", "/C", (puid };

Process PS = runtime.getruntime(cmd.exe C (command );

 

 

 

There is also a way for Linux:

The "EHCO" command outputs the content in quotation marks to the standard output device. Pipeline command will be used here"|"Use the output of the [Echo] command as the input of the [OpenSSL] command.

In JavaProgram.

     /**  * Data encryption processing **  @ Param  Data to be encrypted *  @ Param  Commonkey encrypted password file name *  @ Return  Encrypt data  */      Public   Static   Final  Synchronized  String encryption (string data, string commonkey ){  //  Encrypted data definition String encryptiondata = "" ;  Try  {  //  Encryption command String encryption = "echo-e \" {0} \ "| OpenSSL aes-128-cbc-e-kfile {1}-base64" ;  //  Replace placeholders in Commands Encryption =Messageformat. Format (encryption, Data, commonkey); string [] Sh = New String [] {"/bin/sh", "-c" , Encryption };  //  Execute shell command Processbuilder Pb = New  Processbuilder (SH); process P = PB. Start (); encryptiondata = Getshellout (p );}  Catch (Exception e ){  Throw   New  Encryptionexception (E );}  Return  Encryptiondata ;} 

Capture the output stream of shell commands in a Java program and read encrypted data

     /**  * Read output stream data **  @ Param  P process *  @ Return  Data read from the output stream *  @ Throws  Ioexception */      Public   Static   Final String getshellout (PROCESS p) Throws  Ioexception {stringbuilder sb = New  Stringbuilder (); bufferedinputstream in = Null  ; Bufferedreader br = Null  ;  Try {In = New  Bufferedinputstream (P. getinputstream (); br = New Bufferedreader ( New  Inputstreamreader (in); string S;  While (S = Br. Readline ())! = Null  ){  //  Append a line break SB. append (constantutil. line_separator); sb. append (s );}}  Catch  (Ioexception e ){  Throw  E ;}  Finally  {Br. Close (); in. Close ();}  Return  SB. tostring ();}