java執行cmd命令（單條）

java執行cmd命令，返回命令執行結果。

 /**
     * 執行單條指令
     * @param cmd 命令
     * @return 執行結果
     * @throws Exception
     */
    public static String command(String cmd) throws Exception{
        Process process = Runtime.getRuntime().exec(cmd);
        process.waitFor();
        InputStream in = process.getInputStream();
        StringBuilder result = new StringBuilder();
        byte[] data = new byte[1024];
        while(in.read(data) != -1){
            String encoding = System.getProperty("sun.jnu.encoding");
            result.append(new String(data,encoding));
        }
        return result.toString();
    }