Java traversal of all classes under the specified package name (support Jar)

package com.shdl.htscada.utils;import java.io.file;import java.io.ioexception;import  Java.io.unsupportedencodingexception;import java.net.jarurlconnection;import java.net.url;import  java.net.URLClassLoader;import java.util.Enumeration;import java.util.HashSet;import  java.util.set;import java.util.jar.jarentry;import java.util.jar.jarfile;/** *  traversal of all classes under the specified package name (Support jar)  *  @author  ht-meeting *  @date  2017 July 7  */public class  Classfilesutils {public static void main (String[] args)  throws Exception  {String packageName =  "com.shdl.htscada.i18n"; Set<string> classnames = getclassname (packagename, false,  ". Properties");   (Classnames != null)  {for  (string classname : classnames)  { System.out.println (ClassName);}}} /** *  get all Classes  *  @param under a package  p ackagename  Package Name  *  @param  isRecursion  whether to traverse a child package  *  @param  suffixstr  After able name  *  @return   Full Name of Class  */public static set<string> getclassname (String &NBSP;PACKAGENAME,&NBSP;BOOLEAN&NBSP;ISRECURSION&NBSP;,STRING&NBSP;SUFFIXSTR)  {Set<String>  classnames = null; Classloader loader = thread.currentthread (). Getcontextclassloader (); String packagepath = packagename.replace (".",  "/"); Url url = loader.getresource (PackagePath);if  (url != null)  {String  Protocol = url.getprotocol ();if  (protocol.equals ("file"))  {classNames =  Getclassnamefromdir (Url.getpath (),  packagename, isrecursion, suffixstr);}  else if  (Protocol.equals ("jar"))  {JarFile jarFile = null;try{                 jarfile =  ((jarurlconnection)  url.openconnection ()). Getjarfile ();  catch (exception e) {e.printstacktrace ();} if (jarfile != null) {Getclassnamefromjar (Jarfile.entries (),  packagename, isrecursion);}}}  else {/* finds the package name */classnames = getclassnamefromjars (((urlclassloader) loader) from all jar packages. getURLs (),  packagename, isrecursion);} Return classnames;} /** *  All Classes  *  @param  filePath  file Paths  *  @param  classname from the project file for a package   Class name Collection  *  @param  isRecursion  whether to traverse a child package  *  @param  suffixstr  able name  *   @return   class full name  */private static set<string> getclassnamefromdir (String &NBSP;FILEPATH,&NBSP;STRING&NBSP;PACKAGENAME,&NBSP;BOOLEAN&NBSP;ISRECURSION,&NBSP;STRING&NBSP;SUFFIXSTR)   {set<string> classname = new hashset<string> ();try {filePath =  Java.net.URLDecoder.decode (New string (FilepAth.getbytes ("iso-8859-1"),  "UTF-8"),  "UTF-8"); File file = new file (FilePath); File[] files = file.listfiles ();for  (file childfile : files)  {if  (Childfile.isdirectory ())  {if  (isrecursion)  {classname.addall (Getclassnamefromdir ( Childfile.getpath (),  packagename+ "." +childfile.getname (),  isrecursion, suffixstr));}}  else {string filename = childfile.getname (;if ) (FileName.endsWith (SUFFIXSTR)  && !filename.contains ("$"))  {//classname.add (fileName); Classname.add (packageName+   "."  + filename);}}}  catch  (unsupportedencodingexception e)  {e.printstacktrace ();} Return classname;} /** *  @param  jarEntries *  @param  packageName *  @param  isrecursion  *  @return  */private static set<string> getclassnamefromjar (Enumeration <jarentry>  jarentries, string packagename, boolean isrecursion) {Set<String>  Classnames = new hashset<string> ();while  (Jarentries.hasmoreelements ())  { Jarentry jarentry = jarentries.nextelement (); if (!jarentry.isdirectory ()) {/*              *  here is for convenience, first turn "/"   turn   "."   Re-judgment   ". Class"   practice may be bug              *  (fixme:  First "/"   turn   "."   Re-judgment   ". Class"   practice may have bugs)               */string entryname = jarentry.getname (). Replace ("/",  "."); if  (Entryname.endswith (". Class")  && !entryname.contains ("$")  &&  Entryname.startswith (PackageName))  {entryname = entryname.replace (". Class",  ""); if ( Isrecursion) {CLASSNAMES.ADD (entryName);}  else if (!entryname.replace (packagename+ "",  ""). Contains (".")) {Classnames.add (entryName);}}}} Return classnames;} /** *  search for the package from all jars and get all classes  *  @param  urls url collections under the package  *  @param   packagename  package Path  *  @param  isRecursion  whether to traverse the child package  *  @return   The full name of the class  */ Private static set<string> getclassnamefromjars (url[] urls, string  Packagename, boolean isrecursion)  {Set<String> classNames = new  Hashset<string> ();for  (int i = 0; i < urls.length; i++)   {String classpath = urls[i].getpath ();//Do not search Classes folder if  (Classpath.endswith ("classes/"))  {continue;} Jarfile jarfile = null;try {jarfile = new jarfile (ClassPath.substring ( Classpath.indexof ("/")));}  catch  (ioexception e)  {e.printstacktrace ();} If  (Jarfile != null)  {classnames.addall (Getclassnamefromjar (jarfile.entries (),  packagename, isrecursion));}} Return classnames;}}

Java traversal of all classes under the specified package name (support Jar)