需要用到jcraft依賴，如果依賴失效，請前往官方獲取jcraft官網，maven地址https://search.maven.org/artifact/com.jcraft/jsch

<dependency><groupId>com.jcraft</groupId><artifactId>jsch</artifactId><version>0.1.55</version></dependency>

?一個java類就可以了

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;/*** 遠程調用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;/*** 連接到指定的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;}/*** 遠程連接Linux 服務器 執行相關的命令** @param commands 執行的腳本* @param user 遠程連接的用戶名* @param passwd 遠程連接的密碼* @param host 遠程連接的主機IP* @return 最終命令返回信息*/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) {//舍棄PID 進程信息if (buf.contains("PID")) {break;}stringBuffer.append(buf.trim()).append(LINE_SEPARATOR);}//每個命令存儲自己返回數據-用于后續對返回數據進行處理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;}/*** 直接在本地執行 shell** @param commands 執行的腳本* @return 執行結果信息*/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) {//舍棄PID 進程信息if (buf.contains("PID")) {break;}stringBuffer.append(buf.trim()).append(LINE_SEPARATOR);}} catch (IOException e) {e.printStackTrace();return null;}//每個命令存儲自己返回數據-用于后續對返回數據進行處理map.put(command, stringBuffer.toString());}return map;}/*** 處理 shell 返回的信息* <p>* 具體處理過程以服務器返回數據格式為準* 不同的Linux 版本返回信息格式不同** @param result shell 返回的信息* @return 最終處理后的信息*/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);//將返回結果按換行符分割for (String line : strings) {line = line.toUpperCase();//轉大寫處理//處理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 用戶使用占有率:";try {cpuStr += line.split(":")[1].split(",")[0].replace("US", "");} catch (Exception e) {e.printStackTrace();cpuStr += "計算過程出錯";}buffer.append(cpuStr).append(LINE_SEPARATOR);//處理內存 Mem: 66100704k total, 65323404k used, 777300k free, 89940k buffers} else if (line.startsWith("MEM")) {String memStr = "內存使用情況:";try {memStr += line.split(":")[1].replace("TOTAL", "總計").replace("USED", "已使用").replace("FREE", "空閑").replace("BUFFERS", "緩存");} catch (Exception e) {e.printStackTrace();memStr += "計算過程出錯";buffer.append(memStr).append(LINE_SEPARATOR);continue;}buffer.append(memStr).append(LINE_SEPARATOR);}}} else if (command.equals(FILES_SHELL)) {//處理系統磁盤狀態buffer.append("系統磁盤狀態:");try {buffer.append(disposeFilesSystem(commandResult)).append(LINE_SEPARATOR);} catch (Exception e) {e.printStackTrace();buffer.append("計算過程出錯").append(LINE_SEPARATOR);}}}return buffer.toString();}//處理系統磁盤狀態/*** Filesystem Size Used Avail Use% Mounted on* /dev/sda3 442G 327G 93G 78% /* tmpfs 32G 0 32G 0% /dev/shm* /dev/sda1 788M 60M 689M 8% /boot* /dev/md0 1.9T 483G 1.4T 26% /ezsonar** @param commandResult 處理系統磁盤狀態shell執行結果* @return 處理后的結果*/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 ,空閑").append(size - used).append("G").toString();}/*** 處理單位轉換* K/KB/M/T 最終轉換為G 處理** @param s 帶單位的數據字符串* @return 以G 為單位處理后的數值*/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));}}

顯示效果如下：

CPU 用戶使用占有率: 14.5% 內存使用情況: 65972228K 總計, 55482940K 已使用, 10489288K 空閑, 3216072K 緩存 系統磁盤狀態:大小 986G , 已使用25G ,空閑961G

?

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