Java调用Linux命令行若干实例(转)

 Executing a CommandSee also .

try {
        // Execute a command without arguments
        String command = "ls";
        Process child = Runtime.getRuntime().exec(command);
    
        // Execute a command with an argument
        command = "ls /tmp";
        child = Runtime.getRuntime().exec(command);
    } catch (IOException e) {
    }

If an argument contain spaces, it is necessary to use the overload that requires the command and its arguments to be supplied in an array:

try {
        // Execute a command with an argument that contains a space
        String[] commands = new String[]{"grep", "hello world", "/tmp/f.txt"};
        commands = new String[]{"grep", "hello world", "c:\\Documents and Settings\\f.txt"};
        Process child = Runtime.getRuntime().exec(commands);
    } catch (IOException e) {
    }

e90. Reading Output from a Command
try {
        // Execute command
        String command = "ls";
        Process child = Runtime.getRuntime().exec(command);
    
        // Get the input stream and read from it
        InputStream in = child.getInputStream();
        int c;
        while ((c = in.read()) != -1) {
            process((char)c);
        }
        in.close();
    } catch (IOException e) {
    }

 

e91. Sending Input to a Command
try {
        // Execute command
        String command = "cat";
        Process child = Runtime.getRuntime().exec(command);
    
        // Get output stream to write from it
        OutputStream out = child.getOutputStream();
    
        out.write("some text".getBytes());
        out.close();
    } catch (IOException e) {
    }