%java命令 在Java中执行命令行操作

import java.io.*;

public class CommandLineExec {
public static void main(String[] args) throws IOException {
Process p = Runtime.getRuntime().exec("cmd /c dir"); // Windows环境下执行dir命令

BufferedReader inStreamReader =
new BufferedReader(new InputStreamReader(p.getInputStream()));

String inputLine;

while ((inputLine = inStreamReader.readLine()) != null)
System.out.println(inputLine);

int exitCode = p.waitFor();
if (exitCode == 0)
System.out.println("\nCommand executed successfully.");
else
System.out.println("\nError occurred while executing the command");

inStreamReader.close();
}
}

import java.io.*;
import java.util.Arrays;

public class CommandUsingPB {
public static void main(String[] args) throws Exception{
List<String> commands = Arrays.asList("/bin/sh", "-c", "ls -l");

ProcessBuilder pb = new ProcessBuilder(commands);

final Process process = pb.start();

InputStream inputStream = process.getInputStream();
OutputStream outputStream = process.getOutputStream();
ErrorStream errorStream = process.getErrorStream();

Thread outputGobbler = new Thread(() -> readAndPrint(inputStream));
outputGobbler.start();

// 同样可以为错误流开启一个线程去监听打印

process.waitFor();
}

private static void readAndPrint(InputStream is){
try (BufferedReader reader = new BufferedReader(new InputStreamReader(is))){
String line;
while((line = reader.readLine())!=null){
System.out.println(line);
}
} catch(Exception e){
throw new RuntimeException(e.getMessage(),e);
}
}
}