How to execute Linux commands in java

The example in this article describes how java executes Linux commands. Share it with everyone for your reference. The specific implementation method is as follows:

Copy the code code as follows:
public class StreamGobbler extends Thread {

InputStream is;
String type;

public StreamGobbler(InputStream is, String type) {
this.is = is;
this.type = type;
}

public void run() {
try {
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
if (type.equals("Error")) {
System.out.println("Error :" + line);
} else {
System.out.println("Debug:" + line);
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
private void shell(String cmd)
{
String[] cmds = { "/bin/sh", "-c", cmd };
Process process;

try
{
process = Runtime.getRuntime().exec(cmds);

StreamGobbler errorGobbler = new StreamGobbler(process.getErrorStream(), "Error");
StreamGobbler outputGobbler = new StreamGobbler(process.getInputStream(), "Output");
errorGobbler.start();
outputGobbler.start();
try
{
process.waitFor();
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
catch (IOException e)
{
e.printStackTrace();
}
}

The parameter cmd is a Linux command. Only one command can be executed at a time.

1. Notes on Java Runtime.exec():

① Always read the data stream before calling the waitFor() method ② Always read from the standard error stream first, and then read the standard output stream

2. The best way to execute system commands is to write a bat file or shell script.

I hope this article will be helpful to everyone’s Java programming.