有时候需要在java代码中调用linux的一些命令实现某些功能。例如1:将音频的.wav格式转换成.mp3格式,windows系统下可以直接调用ffmpeg的命令;在linux系统下,需要安装配置好ffmpeg的环境,调用ffmpeg在linux转换的命令。例如2:需要在linux系统下调用一些脚本(shell或python等),就需要用到这个方法。
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class JavaShellUtils {
public static String execute(String command) {
String returnString = "";
Process pro = null;
Runtime runTime = Runtime.getRuntime();
if (runTime == null) {
System.err.println("Create runtime false!");
}
try {
System.out.println("开始转换");
pro = runTime.exec(command);
BufferedReader input = new BufferedReader(new InputStreamReader(pro.getInputStream()));
PrintWriter output = new PrintWriter(new OutputStreamWriter(pro.getOutputStream()));
String line;
while ((line = input.readLine()) != null) {
System.out.println("line: " + line);
returnString = returnString + line + "\n";
}
System.out.println("返回值:" + returnString);
input.close();
output.close();
pro.destroy();
} catch (IOException ex) {
ex.printStackTrace();
}
return returnString;
}
}