java操作linux，调用shell命令

import org.junit.jupiter.api.Test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Test001 {
    public static String exec(String command) throws InterruptedException {
        String returnString = "";
        Process pro = null;
        Runtime runTime = Runtime.getRuntime();
        if (runTime == null) {
            System.err.println("Create runtime false!");
        }
        try {
            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) {
                returnString = returnString + line + "\n";
            }
            input.close();
            output.close();
            pro.destroy();
        } catch (IOException ex) {
            Logger.getLogger(Test001.class.getName()).log(Level.SEVERE, null, ex);
        }
        return returnString;
    }

    @Test
    public void test() throws Exception {
        System.out.println(exec("ls -al"));
    }

}

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);  
    }  
}

package test.shell;

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class JavaShellUtil {
    //基本路径
    private static final String basePath = "/tmp/";

    //记录Shell执行状况的日志文件的位置(绝对路径)
    private static final String executeShellLogFile = basePath + "executeShell.log";

    //发送文件到Kondor系统的Shell的文件名(绝对路径)
    private static final String sendKondorShellName = basePath + "sendKondorFile.sh";

    public int executeShell(String shellCommand) throws IOException {
        int success = 0;
        StringBuffer stringBuffer = new StringBuffer();
        BufferedReader bufferedReader = null;
//格式化日期时间，记录日志时使用  
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:SS ");

        try {
            stringBuffer.append(dateFormat.format(new Date())).append("准备执行Shell命令 ").append(shellCommand).append(" \r\n");

            Process pid = null;
            String[] cmd = {"/bin/sh", "-c", shellCommand};
            //执行Shell命令
            pid = Runtime.getRuntime().exec(cmd);
            if (pid != null) {
                stringBuffer.append("进程号：").append(pid.toString()).append("\r\n");
                //bufferedReader用于读取Shell的输出内容 bufferedReader = new BufferedReader(new InputStreamReader(pid.getInputStream()), 1024);
                pid.waitFor();
            } else {
                stringBuffer.append("没有pid\r\n");
            }
            stringBuffer.append(dateFormat.format(new Date())).append("Shell命令执行完毕\r\n执行结果为：\r\n");
            String line = null;
            //读取Shell的输出内容，并添加到stringBuffer中
            while (bufferedReader != null && (line = bufferedReader.readLine()) != null) {
                stringBuffer.append(line).append("\r\n");
            }
        } catch (Exception ioe) {
            stringBuffer.append("执行Shell命令时发生异常：\r\n").append(ioe.getMessage()).append("\r\n");
        } finally {
            if (bufferedReader != null) {
                OutputStreamWriter outputStreamWriter = null;
                try {
                    bufferedReader.close();
                    //将Shell的执行情况输出到日志文件中
                    OutputStream outputStream = new FileOutputStream(executeShellLogFile);
                    outputStreamWriter = new OutputStreamWriter(outputStream, "UTF-8");
                    outputStreamWriter.write(stringBuffer.toString());
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    outputStreamWriter.close();
                }
            }
            success = 1;
        }
        return success;
    }


}