java - 为什么我的 readLine 返回 null？

Question

我的代码:

String correr = "msg /SERVER:" + NomePC.replace(" ", "") + " * /TIME:300 \"" + Mensagem + "\"";
    Process textoo = null;
    try {
        textoo = Runtime.getRuntime().exec(correr);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    BufferedReader innTexto = new BufferedReader(new InputStreamReader(textoo.getInputStream()));

    String lineTexto=null;

    try {
        lineTexto = innTexto.readLine();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    if (lineTexto != null) {
        System.out.println("Não passou");
    }
    else if (lineTexto == null) {
        System.out.println("A sua mensagem foi enviada com sucesso para " + NomePC + " ás: " + dataFormatada);
    }

所以我的 readLine 总是为空，我不知道为什么。我已经打印出来确认一下。当我直接在 cmd 中执行命令时，我得到了答案。那么为什么它不读取该行呢？

Im trying with an array of strings. Still not working

Answer 1

问题是这不是您应该指定命令的方式。您的命令由命令参数组成，您必须分隔每个命令参数!

因此构建一个 String 数组，其中包含:msg，然后是 /SERVER:xxxx 等，并将其传递给 exec。

----编辑

String []cmd = new String[THE_RIGHT_NUMBER_OF_ARGS_COMMAND_INCLUDED];
cmd[0] = "msg";
cmd[1] = "/SERVER:xxxx";
cmd[2] = "*";
cmd[3] = "/TIME:300";
...
textoo = Runtime.getRuntime().exec(cmd)