How to Run a Batch File from Java Code onclicking a Button

Question

On clicking a button in a jsp page, I want to run a batch file. I wrote this code to execute a batch file inside a method, but it's not working. Plz help me out.

public String scheduler() {
    String result=SUCCESS;  
    try {

        Process p =  Runtime.getRuntime().exec("cmd /c start.bat", null, new File("C:\\Program Files\\MySQL\\MySQL Server 5.0\\bin\\start"));

        System.out.println("manual scheduler for application.."+p);
    } catch(Exception e) {  
    }
}

Answer 1

Add this code,

batFile.setExecutable(true);

//Running bat file
Process exec = Runtime.getRuntime().exec(PATH_OF_PARENT_FOLDER_OF_BAT_SCRIPT_FILE+File.separator+batFile.getName());                                                              
byte []buf = new byte[300];
InputStream errorStream = exec.getErrorStream();
errorStream.read(buf);                              
logger.debug(new String(buf));
int waitFor = exec.waitFor();
if(waitFor==0) {
    System.out.println("BAT script executed properly");
}

Answer 2

According to this , the following code should work (just remove the cmd /c ):

public String scheduler() {
    String result=SUCCESS;  
    try {

        File f = new File("C:\\Program Files\\MySQL\\MySQL Server 5.0\\bin\\start")
        Process p =  Runtime.getRuntime().exec("start.bat", null, f);

        System.out.println("manual scheduler for application.."+p);
    } catch(Exception e) {   
    }
}

Answer 3

It's not clear here whether you just want to run a bat file or you want to wait for it to run.

// the location where bat file is located is required eg. K:/MyPath/MyBat.bat in my case // If bat file is in classpath then you can provide direct bat file name MyBat.bat

 **Runtime rt = Runtime.getRuntime() ;
 Process batRunningProcess= rt.exec("cmd /c   K:/MyPath/MyBat.bat");**

// This is to wait for process to complete //if process is completed then value will be 0

 **final int exitVal =  lawTab_Indexer.waitFor();**

// This line is not required if you just want to run a bat file and dont want to wait for it to get completed.