Question

我使用Runtime.getRuntime().exec

时遇到问题

String line = "";
String output = "";
Process p = Runtime.getRuntime().exec(new String[]{"dmidecode | grep UUID:"});
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
    output += (line + '\n').trim();
}

input.close();

我测试了这个并且无法正常工作

String line = "";
String output = "";
Process p = Runtime.getRuntime().exec("dmidecode | grep UUID");
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
    output += (line + '\n').trim();
}
input.close();

我在linux机器上遇到下一个错误：

java.io.IOException: Cannot run program "dmidecode | grep UUID:": error no such file or directory

但是我在控制台中测试了命令，我得到了结果！

dmidecode | grep UUID:=> UUID: 564DAF5F-FBF7-5FEE-6BA4-67F0B12D8E0E

如何使用基于Java的Process获得相同的结果？

Answer 1

管道运算符|不会工作，因为这是命令shell的一部分。尝试使用shell来执行命令。您也可以使用ProcessBuilder以方便

ProcessBuilder builder = 
      new ProcessBuilder("bash", "-c", "dmidecode | grep UID:");
builder.redirectErrorStream(true);
Process p = builder.start();

Runtime.getRuntime（）。exec出错

1 个答案: