swing - calling stand alone java application from a java servlet -

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i new java. have been trying java application development.

  1. i have created stand alone java application. basic calculator application basic operations addition, subtraction, multiplication , division. developed using java swings , awt.its gui

  2. i have java servlet application takes 2 inputs (numbers) user , returns result. whatever basic calculator does, servlet can such operations on numbers , return result client web browser. (client html file)

instead of servlet doing operations, want invoke(from servlet) stand alone application operations , return result servlet. servlet returns result client. possible call stand alone java application servlet. if different ways?

to invoke application,you have write bat or sh file based on operating system. -- invoke command using processbuilder -- sample code match requirement

if (osname.indexof("nux") >= 0 || osname.indexof("nix") >= 0)                  {                     //for sending  request sh file                     filepath = request.getsession().getservletcontext().getrealpath("")+"/web-inf/classes/";                     cmdlist.add("sh");                     cmdlist.add("calldesktopapp.sh");                     cmdlist.add(path);                     }                 else                 {                     // windows                     string jrepath="";                     string f="c:/windows/syswow64";                     if(new file(f).exists())                     {                         jrepath="c:\\program files (x86)\\java\\jre6\\bin\\java";                         jrepath="\""+jrepath+"\"";                     }                     else                      {                         jrepath="c:\\program files\\java\\jre6\\bin\\java";                         jrepath="\""+jrepath+"\"";                     }                     filepath = request.getsession().getservletcontext().getrealpath("")+"\\web-inf\\classes\\";                 cmdlist.add("cmd");                     cmdlist.add("/c");                     cmdlist.add("calldesktopapp.bat");                     cmdlist.add(path);                     cmdlist.add(jrepath);                 }                     pb=new processbuilder(cmdlist);                  pb.directory(new file(filepath));                 process = pb.start();                  //read out dir output                 inputstream = process.getinputstream();                 inputstreamreader isr = new inputstreamreader(is);                 bufferedreader br = new bufferedreader(isr);                 string line;                 while ((line = br.readline()) != null) {                     system.out.println(line);                 }                 br.close();                 is.close();                 isr.close();              }

hope may you.


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