Wie führt man ein Unix-Shell-Skript aus Java-Code aus?

Question

Es ist recht einfach, einen Unix-Befehl von Java aus auszuführen.

Runtime.getRuntime().exec(myCommand);

Aber ist es möglich, ein Unix-Shell-Skript mit Java-Code auszuführen? Wenn ja, wäre es eine gute Praxis, ein Shell-Skript aus Java-Code heraus auszuführen?

Answer 1

Genauso wie unter Solaris 5.10 funktioniert es folgendermaßen ./batchstart.sh Es gibt einen Trick, ich weiß nicht, ob Ihr Betriebssystem ihn akzeptiert \\. batchstart.sh stattdessen. Dieser doppelte Schrägstrich kann helfen.

Answer 2

Für die Verwendung unter Linux

public static void runShell(String directory, String command, String[] args, Map<String, String> environment)
{
    try
    {
        if(directory.trim().equals(""))
            directory = "/";

        String[] cmd = new String[args.length + 1];
        cmd[0] = command;

        int count = 1;

        for(String s : args)
        {
            cmd[count] = s;
            count++;
        }

        ProcessBuilder pb = new ProcessBuilder(cmd);

        Map<String, String> env = pb.environment();

        for(String s : environment.keySet())
            env.put(s, environment.get(s));

        pb.directory(new File(directory));

        Process process = pb.start();

        BufferedReader inputReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        BufferedWriter outputReader = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
        BufferedReader errReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

        int exitValue = process.waitFor();

        if(exitValue != 0) // has errors
        {
            while(errReader.ready())
            {
                LogClass.log("ErrShell: " + errReader.readLine(), LogClass.LogMode.LogAll);
            }
        }
        else
        {
            while(inputReader.ready())
            {
                LogClass.log("Shell Result : " + inputReader.readLine(), LogClass.LogMode.LogAll);
            }
        }
    }
    catch(Exception e)
    {
        LogClass.log("Err: RunShell, " + e.toString(), LogClass.LogMode.LogAll);
    }
}

public static void runShell(String path, String command, String[] args)
{
    try
    {
        String[] cmd = new String[args.length + 1];

        if(!path.trim().isEmpty())
            cmd[0] = path + "/" + command;
        else
            cmd[0] = command;

        int count = 1;

        for(String s : args)
        {
            cmd[count] = s;
            count++;
        }

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

        BufferedReader inputReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        BufferedWriter outputReader = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
        BufferedReader errReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

        int exitValue = process.waitFor();

        if(exitValue != 0) // has errors
        {
            while(errReader.ready())
            {
                LogClass.log("ErrShell: " + errReader.readLine(), LogClass.LogMode.LogAll);
            }
        }
        else
        {
            while(inputReader.ready())
            {
                LogClass.log("Shell Result: " + inputReader.readLine(), LogClass.LogMode.LogAll);
            }
        }
    }
    catch(Exception e)
    {
        LogClass.log("Err: RunShell, " + e.toString(), LogClass.LogMode.LogAll);
    }
}

und für die Nutzung;

ShellAssistance.runShell("", "pg_dump", new String[]{"-U", "aliAdmin", "-f", "/home/Backup.sql", "StoresAssistanceDB"});

OR

ShellAssistance.runShell("", "pg_dump", new String[]{"-U", "aliAdmin", "-f", "/home/Backup.sql", "StoresAssistanceDB"}, new Hashmap<>());