需求一：使用Java代码获取Linux系统执行命令后的结果
需求二：获取xml节点数据
解答：
import java.io.*;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.util.*;
import java.util.concurrent.CountDownLatch;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.tree.DefaultAttribute;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import xsf.data.*;
/**
* SSH工具类
* @author
* 2013-4-7
*/
public class TestGetData {
public static void main(String args[]){
}
//// public static Map getXml(String url){
//// Map<String, String> hashMap = new HashMap<>();
//// //创建解析器
//// SAXReader saxreader = new SAXReader();
//// //读取文档
//// Document doc = null;
//// try {
//// doc = saxreader.read(new File(url));
//// } catch (DocumentException e) {
//// e.printStackTrace();
//// }
//// //获取根
//// Element root = doc.getRootElement();
//// //获取子节点
//// List<Element> list = root.elements();
//// for (Element element : list) {
//// String name = element.getName();
//// if("System".equals(name)){
//// Element dbConnection = element.element("DataBase").element("DBConnection");
//// String removeAbandoned = dbConnection.attributeValue("removeAbandoned");
//// hashMap.put("removeAbandoned",removeAbandoned != "" && removeAbandoned != null ? removeAbandoned : "");
//// String removeAbandonedTimeout = dbConnection.attributeValue("removeAbandonedTimeout");
//// hashMap.put("removeAbandonedTimeout",removeAbandonedTimeout != "" && removeAbandonedTimeout != null ? removeAbandonedTimeout : "");
//// String logAbandoned = dbConnection.attributeValue("logAbandoned");
//// hashMap.put("logAbandoned",logAbandoned != "" && logAbandoned != null ? logAbandoned : "");
//// }
//// if("Service".equals(name)){
//// Element connector = element.element("Connector");
//// hashMap.put("port",connector.attributeValue("port"));
//// hashMap.put("protocol",connector.attributeValue("protocol"));
//// hashMap.put("maxThreads",connector.attributeValue("maxThreads"));
//// hashMap.put("connectionTimeout",connector.attributeValue("connectionTimeout"));
//// }
//// if("ConnectionSettings".equals(name)){
//// List<Element> settings = element.elements("Settings");
//// for (Element setting : settings) {
//// String attributeValue = setting.attributeValue("Id");
//// if("XUGUConnection".equals(attributeValue)){
//// List<Element> elements = setting.elements("Add");
//// for (Element attr : elements) {
//// List<Object> attributes = attr.attributes();
//// DefaultAttribute value = (DefaultAttribute) attributes.get(0);
//// String valueValue = value.getValue();
//// DefaultAttribute data = (DefaultAttribute) attributes.get(1);
//// String dataValue = data.getValue();
//// if("removeAbandoned".equals(valueValue)){
//// hashMap.put("removeAbandoned",dataValue);
//// }
//// if("removeAbandonedTimeout".equals(valueValue)){
//// hashMap.put("removeAbandonedTimeout",dataValue);
//// }
//// if("logAbandoned".equals(valueValue)){
//// hashMap.put("logAbandoned",dataValue);
//// }
//// }
//// }
//// }
//// }
////
//// }
//// return hashMap;
//// }
//
//
// static ThreadPoolTaskExecutor threadPoolTaskExecutor;
//
// static {
// threadPoolTaskExecutor = new ThreadPoolTaskExecutor();
// threadPoolTaskExecutor.setCorePoolSize(5);
// threadPoolTaskExecutor.setMaxPoolSize(10);
// threadPoolTaskExecutor.setQueueCapacity(100);
// threadPoolTaskExecutor.initialize();
// }
//
// /**
// * 获取数据
// */
// public static List<Map> getData(){
// List<Map> list = new ArrayList<>();
// if(!"Linux".equals(OSinfo.getOSname())){
// final CountDownLatch latch = new CountDownLatch(5);
// threadPoolTaskExecutor.submit(new Runnable() {
// @Override
// public void run() {
// TestGetData.getJVM();
// latch.countDown();
// }
// });
// threadPoolTaskExecutor.submit(new Runnable() {
// @Override
// public void run() {
// Map linux = TestGetData.getOpenFiles("192.168.134.100", "root", "root", 22, "ulimit -a");
// list.add(linux);
// latch.countDown();
// }
// });
// threadPoolTaskExecutor.submit(new Runnable() {
// @Override
// public void run() {
// Map mysql = TestGetData.getMysql("192.168.134.100", "root", "root", 22, "cat /etc/my.cnf");
// list.add(mysql);
// latch.countDown();
// }
// });
// threadPoolTaskExecutor.submit(new Runnable() {
// @Override
// public void run() {
// Map redis = TestGetData.getRedis("192.168.134.100", "root", "root", 22, "cat redis.conf", "/usr/local/redis/bin/redis-cli info clients");
// list.add(redis);
// latch.countDown();
// }
// });
// threadPoolTaskExecutor.submit(new Runnable() {
// @Override
// public void run() {
//// Map tomcat = TestGetData.getXml("G:\\Tomcat\\PersonalTomcat\\OrdinaryTomcat\\apache-tomcat-9.0.27\\conf\\server.xml");
//// list.add(tomcat);
// latch.countDown();
// }
// });
// }
// return list;
// }
//
//
//
// /**
// * 远程 执行命令并返回结果调用过程 是同步的（执行完23才会返回）
// * @param host 主机名
// * @param user 用户名
// * @param psw 密码
// * @param port 端口
// * @param command 命令
// * @return
// */
// public static Map exec(String host,String user,String psw,int port,String command){
// String result="";
// Session session =null;
// ChannelExec openChannel =null;
// Map<String, String> map = new HashMap<>();
// try {
// JSch jsch=new JSch();
// session = jsch.getSession(user, host, port);
// java.util.Properties config = new java.util.Properties();
// config.put("StrictHostKeyChecking", "no");
// session.setConfig(config);
// session.setPassword(psw);
// session.connect();
// openChannel = (ChannelExec) session.openChannel("exec");
// openChannel.setCommand(command);
// openChannel.connect();
// InputStream in = openChannel.getInputStream();
// BufferedReader reader = new BufferedReader(new InputStreamReader(in));
// String buf = null;
// while ((buf = reader.readLine()) != null) {
// String data = new String(buf.getBytes("UTF-8"),"UTF-8");
// result+= data +"\r\n";
// if(buf.contains("open files")){
// map.put("openFiles",data);
// }
// if(buf.contains("soft nofile")){
// map.put("softNofile",data);
// }
// if(buf.contains("hard nofile")){
// map.put("hardNofile",data);
// }
// if(buf.contains("max_connections")){
// map.put("maxConnections",data);
// }
// if(buf.contains("innodb_buffer_pool_size")){
// map.put("innodbBufferPoolSize",data);
// }
// if(buf.contains("timeout")){
// map.put("timeout",data);
// }
// if(buf.contains("connected_clients")){
// map.put("connectedClients",data);
// }
// }
// } catch (JSchException | IOException e) {
// result+=e.getMessage();
// }finally{
// if(openChannel!=null&&!openChannel.isClosed()){
// openChannel.disconnect();
// }
// if(session!=null&&session.isConnected()){
// session.disconnect();
// }
// }
// map.put("all",result);
// return map;
// }
//
// public static void getJVM(){
// MemoryMXBean memorymbean = ManagementFactory.getMemoryMXBean();
// System.out.println("堆内存信息: " + memorymbean.getHeapMemoryUsage());
// System.out.println("方法区内存信息: " + memorymbean.getNonHeapMemoryUsage());
//
// List<String> inputArgs = ManagementFactory.getRuntimeMXBean().getInputArguments();
// System.out.println("\n#####################运行时设置的JVM参数#######################");
// System.out.println(inputArgs);
//
// System.out.println("\n#####################运行时内存情况#######################");
// long totle = Runtime.getRuntime().totalMemory();
// System.out.println("总的内存量 [" + totle + "]");
// long free = Runtime.getRuntime().freeMemory();
// System.out.println("空闲的内存量 [" + free + "]");
// long max = Runtime.getRuntime().maxMemory();
// System.out.println("最大的内存量 [" + max + "]");
// }
//
//
//
// public static Map getRedis(String host,String user,String psw,int port,String conf,String info){
// Map map = exec(host, user, psw, port, conf);//"cat redis.conf"
// Map<String, String> hashMap = new HashMap<>();
// if(!CollectionUtils.isEmpty(map)){
// String timeoutStr = (String) map.get("timeout");
// if(!StringUtils.isEmpty(timeoutStr)){
// hashMap.put("timeout ",timeoutStr);
// }else {
// hashMap.put("timeout ","0");
// }
// }
// Map clients = exec(host, user, psw, port, info);//"/usr/local/redis/bin/redis-cli info clients"
// String connectedClients = getInt(((String)clients.get("connectedClients")));
// hashMap.put("connectedClients",connectedClients);
// return hashMap;
// }
//
// /**
// * 获取mysql参数
// * @return
// */
// public static Map getMysql(String host,String user,String psw,int port,String command){
// Map map = exec(host, user, psw, port, command);//"cat /etc/my.cnf"
// Map<String, String> hashMap = new HashMap<>();
// if(!CollectionUtils.isEmpty(map)){
// String maxConnections = getInt(((String)map.get("maxConnections")));
// if(StringUtils.isEmpty(maxConnections)){
// maxConnections = "0";
// hashMap.put("maxConnections",maxConnections);
// }
// String innodbBufferPoolSize = getInt((String)map.get("innodbBufferPoolSize"));
// if(StringUtils.isEmpty(innodbBufferPoolSize)){
// innodbBufferPoolSize = "0";
// hashMap.put("innodbBufferPoolSize",innodbBufferPoolSize);
// }
// }
// return hashMap;
// }
//
// /**
// * 获取打开的最大文件数
// * @return
// */
// public static Map getOpenFiles(String host,String user,String psw,int port,String ulimit){
// Map<String, String> hashMap = new HashMap<>();
// Map map = exec(host, user, psw, port, ulimit);//ulimit -a
// String openFiles = (String) map.get("openFiles");
// hashMap.put("openFiles",openFiles);
// return hashMap;
// }
//
// /**
// * 获取nofile
// * @param host
// * @param user
// * @param psw
// * @param port
// * @param noFile
// * @return
// */
// public static Map getNofile(String host,String user,String psw,int port,String noFile){
// Map<String, String> hashMap = new HashMap<>();
// Map exec = exec(host, user, psw, port, noFile);//"cat /etc/security/limits.conf"
// String hardNofile = getInt((String)exec.get("hardNofile"));
// hashMap.put("hardNofile",hardNofile);
// String softNofile = getInt((String)exec.get("softNofile"));
// hashMap.put("softNofile",softNofile);
// return hashMap;
// }
//
// /**
// * 获取数字
// * @param str
// * @return
// */
// private static String getInt(String str){
// String regEx="[^0-9]";
// Pattern p = Pattern.compile(regEx);
// Matcher m = p.matcher(str);
// return m.replaceAll("").trim();
// }
}pom.xml
<!--远程连接linux建立SSH连接-->
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.46</version>
</dependency>