如何使用java Runtime来执行redis后台

Question

我使用此方法call_shell()连接Java和shell。

private static String call_shell(String command) throws IOException, InterruptedException{
        Process proc = Runtime.getRuntime().exec(command);
        if(proc.waitFor() != 0){
            System.out.println("wrong in shell.");
        } 
        String s = null;
        StringBuilder sb = new StringBuilder();
        BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream()));
        while((s = br.readLine()) != null){
            sb.append(s).append("\r\n");
        }
        br.close();
        return sb.toString();
    }

但是，当我使用System.out.println(call_shell("/usr/local/bin/redis-server"));调用此方法时，它将在控制台上被阻止，因为redis-server将阻止bash。

所以我使用System.out.println(call_shell("/usr/local/bin/redis-server &"));并想要运行它的背景。但是，结果是错误

wrong in shell.
24759:C 21 Apr 16:45:47.718 # Fatal error, can't open config file '&'

如何运行背景？