Java calls shell commands and obtains execution results

The process and runtime classes are used. The returned values are obtained using the getinputstream () method of the Process class.

package ark;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;public class ReadCmdLine {public static void main(String args[]) {Process process = null;List<String> processList = new ArrayList<String>();try {process = Runtime.getRuntime().exec("ps -aux");BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));String line = "";while ((line = input.readLine()) != null) {processList.add(line);}input.close();} catch (IOException e) {e.printStackTrace();}for (String line : processList) {System.out.println(line);}}}

Call the shell script to determine whether the execution is normal. If the process ends normally, the waitfor () method of process returns 0.

public static void callShell(String shellString) {try {Process process = Runtime.getRuntime().exec(shellString);int exitValue = process.waitFor();if (0 != exitValue) {log.error("call shell failed. error code is :" + exitValue);}} catch (Throwable e) {log.error("call shell failed. " + e);}}