调用cmd只能用流数据实时获取输出内容，同步输入输出不及时处理一样会堵塞，但你可以改动代码采用异步的方式，下面的实现方式和socket的方法一样,其他语言也是一样的思路。
public class ApiCmd
{
public int time=100;//随时设置等待时间
public ApiCmd(int _time=100) { time = _time; }
public const int ReadSize = 2048;//缓冲区大小
private Encoding encoding;//字符编码
private Process cmd;//cmd进程
public event Action Exited;//退出事件
public event Action<string, StreamWriter> output;//输出事件
private byte[] ReadBuffer = new byte[ReadSize];//缓冲区
private List<byte> ReadList = new List<byte>();//暂存区
public void Start()
{
cmd = new Process();
cmd.StartInfo.FileName = "cmd.exe";
cmd.StartInfo.UseShellExecute = false;//是否使用操作系统shell启动
cmd.StartInfo.RedirectStandardInput = true;//接受来自调用程序的输入信息
cmd.StartInfo.RedirectStandardOutput = true;//由调用程序获取输出信息
cmd.StartInfo.RedirectStandardError = true;//重定向标准错误输出
cmd.StartInfo.CreateNoWindow = true;//不显示程序窗口
cmd.Exited += Process_Exited;
cmd.Start();
encoding = cmd.StandardOutput.CurrentEncoding;
cmd.StandardOutput.BaseStream.BeginRead(ReadBuffer, 0, ReadSize, ReadCallback, null);
cmd.StandardError.BaseStream.BeginRead(ReadBuffer, 0, ReadSize, ErrorCallback, null);
cmd.StandardInput.AutoFlush = true;
cmd.StandardInput.WriteLine("echo Hello World!");
}
private bool IsRun = false;
private void ErrorCallback(IAsyncResult ar)
{
int count = cmd.StandardError.BaseStream.EndRead(ar);
if (count < 1) { if (cmd.HasExited) { cmd.Close(); } return; }
else
{
byte[] temp = new byte[count];
Buffer.BlockCopy(ReadBuffer, 0, temp, 0, temp.Length);
ReadList.AddRange(temp);
if (!IsRun) {IsRun = true; Thread thread = new Thread(delegate () { ThreadCallback(ReadList); }); thread.IsBackground = false; thread.Start(); }
cmd.StandardError.BaseStream.BeginRead(ReadBuffer, 0, ReadSize, ErrorCallback, null);
}
}
private void ThreadCallback(List<byte> readt)
{
int count = readt.Count;
Thread.Sleep(time);//等待
if (ReadList.Count > count) { Thread thread = new Thread(delegate () { ThreadCallback(ReadList); }); thread.IsBackground = false; thread.Start();return; }/*等待期过后如果数组变更则重新等待*/
else
{
IsRun = false;
output.Invoke(encoding.GetString(ReadList.ToArray()), cmd.StandardInput);ReadList.Clear();
}
}
private void ReadCallback(IAsyncResult ar)
{
int count = cmd.StandardOutput.BaseStream.EndRead(ar);
if (count < 1) { if (cmd.HasExited) { cmd.Close(); } return; }
else
{
byte[] temp = new byte[count];
Array.Copy(ReadBuffer, 0, temp, 0, temp.Length);
ReadList.AddRange(temp);
if (!IsRun) { IsRun = true; Thread thread = new Thread(delegate () { ThreadCallback(ReadList); }); thread.IsBackground = false; thread.Start(); }
cmd.StandardOutput.BaseStream.BeginRead(ReadBuffer, 0, ReadSize, ReadCallback, null);
}
}
private void Process_Exited(object sender, EventArgs e) { Exited.Invoke(); }
public void WriteLine(string str) { cmd.StandardInput.WriteLine (str); }
public void Close() { cmd.Dispose(); cmd.Close(); }
}
/**************************调用方式******************************/
List<string> output = new List<string>();
output.Add("keytool -genkey -alias myae -keyalg RSA -keystore mykeystore.jks");
output.Add("123456");
output.Add("1");
output.Add("2");
output.Add("3");
output.Add("4");
output.Add("5");
output.Add("6");
output.Add("是");
output.Add("123456");
output.Add("123456");
ApiCmd cmd = new ApiCmd(500);//等待时间500毫秒
cmd.output += Cmd_output1;//命令输出
cmd.Start();
private void Cmd_output1(string arg1, StreamWriter arg2)
{
if (output.Count > 0) {
arg2.WriteLine(output[0]);output.RemoveAt(0);
}
//arg1是一条完整的信息，但等待数据设置太低可能无法获取完整的信息甚至报错
}