Java connection remote Linux Server execute Shell script view CPU, memory, hard disk information

Pom.xml Jar Package Support

<dependency>            <groupId>com.jcraft</groupId>            <artifactId>jsch</artifactId>            <version>0.1.53</version>        </dependency>

Code:

Package Com.spring.bean.annotation;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;/** * Remote call to Linux shell command * * @author Wei. Li by 14-9-2.    */public 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; /** * Connect to the specified host * * @return Isconnect * @throws jschexception jschexception */private static BOOL        EAN 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;   /** * Remote connection to Linux server execution related commands * * @param commands executed script * @param user name for remote connection * @param passwd Password for remote connection * @param host IP for remote connection * @return Final command return information */public static map<string, string> rundist            Anceshell (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) {//Discard PID process information if (Buf.contains ("pid")) {                    Break                } stringbuffer.append (Buf.trim ()). append (Line_separator);            }//each command stores its own return data-for subsequent processing of the returned data 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;  }/** * Executes the shell directly locally * * @param commands executed script * @return Execution result information */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) {//Discard PID process information if (Buf.contains ("pid")) {                    Break                } stringbuffer.append (Buf.trim ()). append (Line_separator);                }} catch (IOException e) {e.printstacktrace ();            return null;        }//each command stores its own return data-for subsequent processing of the returned data map.put (command, stringbuffer.tostring ());    } return map;  /** * Processing the information returned by the shell * <p> * Specific processing process in the server return data format * Different Linux versions return information format different * * @param result  Information returned by the shell * @return final processed information */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);                    Splits the returned result by newline character for (String line:strings) {line = Line.touppercase ();//Turn uppercase processing Processing 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%st if (l                        Ine.startswith ("CPU (S):")) {String Cpustr = "CPU user occupancy:";                        try {cpustr + = Line.split (":") [1].split (",") [0].replace ("US", "");                            } catch (Exception e) {e.printstacktrace ();                        Cpustr + = "Error in calculation process";                        } buffer.append (CPUSTR). Append (Line_separator); Processing memory mem:66100704k Total, 65323404k used, 777300k free, 89940k buffers} else if (LINE.STARTSW                ITH ("MEM")) {        String memstr = "Memory usage:";                                    try {memstr + = Line.split (":") [1]. Replace ("Total", "totals")                                    . Replace ("used", "used"). Replace ("free", "idle")                        . Replace ("Buffers", "cache");                            } catch (Exception e) {e.printstacktrace ();                            Memstr + = "Error in calculation process";                            Buffer.append (MEMSTR). Append (Line_separator);                        Continue                    } buffer.append (MEMSTR). Append (Line_separator); }}} and Else if (Command.equals (Files_shell)) {//Processing system disk status Buffer.ap                Pend ("System disk Status:");                try {buffer.append (Disposefilessystem (Commandresult)). Append (Line_separator); } catch (EXception e) {e.printstacktrace ();                Buffer.append ("Error in calculation procedure"). Append (Line_separator);    }}} return Buffer.tostring ();    }//Processing system disk status/** * 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 processing system disk status Shell execution results * @return Processed results */private static String Disposefilessystem (String commandresult) {string[] strings = comma        Ndresult.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 ("size"). Append. Append ("G, used"). AP    Pend (used). Append ("G, Idle"). Append (size-used). Append ("G"). ToString ();  }/** * Processing Unit conversion * K/KB/M/T final conversion to g processing * * @param S-band unit data String * @return value in G/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, "Dell",        "1", "192.168.1.122");    System.out.println (Disposeresultmessage (result)); }}

Java connection remote Linux Server execute Shell script view CPU, memory, hard disk information