需要用到jcraft依赖，如果依赖失效，请前往官方获取jcraft官网，maven地址/artifact/com.jcraft/jsch
<dependency><groupId>com.jcraft</groupId><artifactId>jsch</artifactId><version>0.1.55</version></dependency>
一个java类就可以了
import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.HashMap;import java.util.Map;import com.jcraft.jsch.Channel;import com.jcraft.jsch.ChannelExec;import com.jcraft.jsch.JSch;import com.jcraft.jsch.JSchException;import com.jcraft.jsch.Session;/*** 远程调用Linux shell 命令** @author wei.Li by 14-9-2.*/class LinuxStateForShell {public static final String CPU_MEM_SHELL = "top -b -n 1";public static final String FILES_SHELL = "df -hl";public static final String[] COMMANDS = {CPU_MEM_SHELL, FILES_SHELL};public static final String LINE_SEPARATOR = System.getProperty("line.separator");private static Session session;/*** 连接到指定的HOST** @return isConnect* @throws JSchException JSchException*/private static boolean connect(String user, String passwd, String host) {JSch jsch = new JSch();try {session = jsch.getSession(user, host, 22);session.setPassword(passwd);java.util.Properties config = new java.util.Properties();config.put("StrictHostKeyChecking", "no");session.setConfig(config);session.connect();} catch (JSchException e) {e.printStackTrace();System.out.println("connect error !");return false;}return true;}/*** 远程连接Linux 服务器 执行相关的命令** @param commands 执行的脚本* @param user远程连接的用户名* @param passwd 远程连接的密码* @param host远程连接的主机IP* @return 最终命令返回信息*/public static Map<String, String> runDistanceShell(String[] commands, String user, String passwd, String host) {if (!connect(user, passwd, host)) {return null;}Map<String, String> map = new HashMap<>();StringBuilder stringBuffer;BufferedReader reader = null;Channel channel = null;try {for (String command : commands) {stringBuffer = new StringBuilder();channel = session.openChannel("exec");((ChannelExec) channel).setCommand(command);channel.setInputStream(null);((ChannelExec) channel).setErrStream(System.err);channel.connect();InputStream in = channel.getInputStream();reader = new BufferedReader(new InputStreamReader(in));String buf;while ((buf = reader.readLine()) != null) {//舍弃PID 进程信息if (buf.contains("PID")) {break;}stringBuffer.append(buf.trim()).append(LINE_SEPARATOR);}//每个命令存储自己返回数据-用于后续对返回数据进行处理map.put(command, stringBuffer.toString());}} catch (IOException | JSchException e) {e.printStackTrace();} finally {try {if (reader != null) {reader.close();}} catch (IOException e) {e.printStackTrace();}if (channel != null) {channel.disconnect();}session.disconnect();}return map;}/*** 直接在本地执行 shell** @param commands 执行的脚本* @return 执行结果信息*/public static Map<String, String> runLocalShell(String[] commands) {Runtime runtime = Runtime.getRuntime();Map<String, String> map = new HashMap<>();StringBuilder stringBuffer;BufferedReader reader;Process process;for (String command : commands) {stringBuffer = new StringBuilder();try {process = runtime.exec(command);InputStream inputStream = process.getInputStream();reader = new BufferedReader(new InputStreamReader(inputStream));String buf;while ((buf = reader.readLine()) != null) {//舍弃PID 进程信息if (buf.contains("PID")) {break;}stringBuffer.append(buf.trim()).append(LINE_SEPARATOR);}} catch (IOException e) {e.printStackTrace();return null;}//每个命令存储自己返回数据-用于后续对返回数据进行处理map.put(command, stringBuffer.toString());}return map;}/*** 处理 shell 返回的信息* <p>* 具体处理过程以服务器返回数据格式为准* 不同的Linux 版本返回信息格式不同** @param result shell 返回的信息* @return 最终处理后的信息*/private static String disposeResultMessage(Map<String, String> result) {StringBuilder buffer = new StringBuilder();for (String command : COMMANDS) {String commandResult = result.get(command);if (null == commandResult) continue;if (command.equals(CPU_MEM_SHELL)) {String[] strings = commandResult.split(LINE_SEPARATOR);//将返回结果按换行符分割for (String line : strings) {line = line.toUpperCase();//转大写处理//处理CPU Cpu(s): 10.8%us, 0.9%sy, 0.0%ni, 87.6%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%stif (line.startsWith("CPU(S):")) {String cpuStr = "CPU 用户使用占有率:";try {cpuStr += line.split(":")[1].split(",")[0].replace("US", "");} catch (Exception e) {e.printStackTrace();cpuStr += "计算过程出错";}buffer.append(cpuStr).append(LINE_SEPARATOR);//处理内存 Mem: 66100704k total, 65323404k used, 777300k free, 89940k buffers} else if (line.startsWith("MEM")) {String memStr = "内存使用情况:";try {memStr += line.split(":")[1].replace("TOTAL", "总计").replace("USED", "已使用").replace("FREE", "空闲").replace("BUFFERS", "缓存");} catch (Exception e) {e.printStackTrace();memStr += "计算过程出错";buffer.append(memStr).append(LINE_SEPARATOR);continue;}buffer.append(memStr).append(LINE_SEPARATOR);}}} else if (command.equals(FILES_SHELL)) {//处理系统磁盘状态buffer.append("系统磁盘状态:");try {buffer.append(disposeFilesSystem(commandResult)).append(LINE_SEPARATOR);} catch (Exception e) {e.printStackTrace();buffer.append("计算过程出错").append(LINE_SEPARATOR);}}}return buffer.toString();}//处理系统磁盘状态/*** Filesystem Size Used Avail Use% Mounted on* /dev/sda3 442G 327G 93G 78% /* tmpfs 32G0 32G 0% /dev/shm* /dev/sda1 788M 60M 689M 8% /boot* /dev/md0 1.9T 483G 1.4T 26% /ezsonar** @param commandResult 处理系统磁盘状态shell执行结果* @return 处理后的结果*/private static String disposeFilesSystem(String commandResult) {String[] strings = commandResult.split(LINE_SEPARATOR);// final String PATTERN_TEMPLATE = "([a-zA-Z0-9%_/]*)\\s";int size = 0;int used = 0;for (int i = 0; i < strings.length - 1; i++) {if (i == 0) continue;int temp = 0;for (String s : strings[i].split("\\b")) {if (temp == 0) {temp++;continue;}if (!s.trim().isEmpty()) {if (temp == 1) {size += disposeUnit(s);temp++;} else {used += disposeUnit(s);temp = 0;}}}}return new StringBuilder().append("大小 ").append(size).append("G , 已使用").append(used).append("G ,空闲").append(size - used).append("G").toString();}/*** 处理单位转换* K/KB/M/T 最终转换为G 处理** @param s 带单位的数据字符串* @return 以G 为单位处理后的数值*/private static int disposeUnit(String s) {try {s = s.toUpperCase();String lastIndex = s.substring(s.length() - 1);String num = s.substring(0, s.length() - 1);int parseInt = Integer.parseInt(num);if (lastIndex.equals("G")) {return parseInt;} else if (lastIndex.equals("T")) {return parseInt * 1024;} else if (lastIndex.equals("M")) {return parseInt / 1024;} else if (lastIndex.equals("K") || lastIndex.equals("KB")) {return parseInt / (1024 * 1024);}} catch (NumberFormatException e) {e.printStackTrace();return 0;}return 0;}public static void main(String[] args) {Map<String, String> result = runDistanceShell(COMMANDS, "root", "password", "192.168.12.12");System.out.println(disposeResultMessage(result));}}
显示效果如下：
CPU 用户使用占有率: 14.5%内存使用情况: 65972228K 总计, 55482940K 已使用, 10489288K 空闲, 3216072K 缓存系统磁盘状态:大小 986G , 已使用25G ,空闲961G
