Java calls the shell script and returns the result set

1 /**2 * Run shell scripts3      * @paramShell scripts that the shell needs to run4      */5      Public Static voidExecshell (String shell) {6         Try {7Runtime RT =runtime.getruntime ();8 rt.exec (shell);9}Catch(Exception e) {Ten e.printstacktrace (); One         } A     } -   -   the /** - * Run Shell -      * -      * @paramShstr + * Shell that needs to be executed -      * @return +      * @throwsIOException A      */ at      Public StaticList Runshell (String shstr)throwsException { -List<string> strlist =NewArrayList (); -   - process process; -Process = Runtime.getruntime (). EXEC (Newstring[]{"/bin/sh", "-C", shstr},NULL,NULL); -InputStreamReader IR =NewInputStreamReader (Process in . getInputStream ()); -LineNumberReader input =NewLineNumberReader (IR); to String Line; + process.waitfor (); -          while(line = Input.readline ())! =NULL){ the Strlist.add (line); *         } $          Panax Notoginseng         returnstrlist; -}

Remotely log in to Linux and invoke the shell

First write a test script test.sh on the remote server and give the executable permission: chmod +x test.sh

1     #!/bin/bash  2     echo ' test22 '  3     echo $  

$ $ is the first parameter passed in the script, and our console prints this parameter

To create a new MAVEN project, add dependencies:

1     <dependency>  2         <groupId>org.jvnet.hudson</groupId>  3         < Artifactid>ganymed-ssh2</artifactid>  4         <version>build210-hudson-1</version >  5     </dependency>  

Write a tool class:

1  PackageCom.xj.runshell; 2   3 Importjava.io.IOException; 4 ImportJava.io.InputStream; 5 ImportJava.nio.charset.Charset; 6   7 Importch.ethz.ssh2.Connection; 8 Importch.ethz.ssh2.Session; 9   Ten  Public classRemoteshelltool { One    A     PrivateConnection Conn;  -     PrivateString ipaddr;  -     PrivateString charset =Charset.defaultcharset (). toString ();  the     PrivateString UserName;  -     PrivateString password;  -    -      PublicRemoteshelltool (String ipaddr, String userName, string password, + String CharSet) {   -          This. ipaddr =ipaddr;  +          This. UserName =UserName;  A          This. Password =password;  at         if(CharSet! =NULL) {   -              This. CharSet =CharSet;  -         }   -     }   -    -      Public BooleanLogin ()throwsIOException { inconn =NewConnection (IPADDR);  -Conn.connect ();//Connection to         returnConn.authenticatewithpassword (userName, password);//Certifications +     }   -    the      Publicstring exec (string cmds) { *InputStream in =NULL;  $String result = ""; Panax Notoginseng         Try {   -             if( This. Login ()) {   theSession session = Conn.opensession ();//Open a session + Session.execcommand (CMDS);  A                    thein =session.getstdout ();  +result = This. Processstdout (In, This. CharSet);  - Session.close ();  $ Conn.close ();  $             }   -}Catch(IOException E1) { - E1.printstacktrace ();  the         }   -         returnresult; Wuyi     }   the    -      Publicstring Processstdout (InputStream in, String charset) { Wu        -         byte[] buf =New byte[1024];  AboutStringBuffer SB =NewStringBuffer ();  $         Try {   -              while(In.read (BUF)! =-1) {   -Sb.append (NewString (BUF, CharSet));  -             }   A}Catch(IOException e) { + E.printstacktrace ();  the         }   -         returnsb.tostring ();  $     }   the    the     /**  the      * @paramargs the      */   -      Public Static voidMain (string[] args) { in    theRemoteshelltool tool =NewRemoteshelltool ("192.168.27.41", "Hadoop",   the"Hadoop", "Utf-8");  About    theString result = Tool.exec ("./test.sh Xiaojun");  the System.out.print (Result);  the    +     }   -    the}

The main function executes the./test.sh Xiaojun This command, the console prints out:

test22

Xiaojun

Java calls the shell script and returns the result set