package com.MyUtils.file;  [java] view plain copy    import java.io.File;      import java.io.FileFilter;      import java.io.IOException;      import java.net.JarURLConnection;      import java.net.URI;      import java.net.URISyntaxException;      import java.net.URL;      import java.util.ArrayList;      import java.util.Enumeration;      import java.util.List;      import java.util.jar.JarEntry;      import java.util.jar.JarFile;                  /**      * 扫描包下路径       * 包括本地文件和jar包文件      * @author ljb      *      */      public class ScanningFile {                    private Class
      superStrategy = String.class;//接口类class 用于过滤 可以不要                    private List
     
      > eleStrategyList = new ArrayList
      
       >();                    private ClassLoader classLoader = ScanningFile.class.getClassLoader();//默认使用的类加载器                    private static final String STARATEGY_PATH = "com.MyUtils.file";//需要扫描的策略包名                    public static void main(String[] args) {              ScanningFile s = new ScanningFile();              s.addClass();          }                     /**          * 获取包下所有实现了superStrategy的类并加入list          */          private void addClass(){              URL url = classLoader.getResource(STARATEGY_PATH.replace(".", "/"));              String protocol = url.getProtocol();                if ("file".equals(protocol)) {                    // 本地自己可见的代码                    findClassLocal(STARATEGY_PATH);              } else if ("jar".equals(protocol)) {                    // 引用jar包的代码                    findClassJar(STARATEGY_PATH);                }            }                    /**          * 本地查找          * @param packName          */          private void findClassLocal(final String packName){              URI url = null ;              try {                  url = classLoader.getResource(packName.replace(".", "/")).toURI();              } catch (URISyntaxException e1) {                  throw new RuntimeException("未找到策略资源");              }                            File file = new File(url);              file.listFiles(new FileFilter() {                                            public boolean accept(File chiFile) {                          if(chiFile.isDirectory()){                              findClassLocal(packName+"."+chiFile.getName());                          }                          if(chiFile.getName().endsWith(".class")){                              Class
        clazz = null;                              try {                                  clazz = classLoader.loadClass(packName + "." + chiFile.getName().replace(".class", ""));                              } catch (ClassNotFoundException e) {                                  e.printStackTrace();                              }                              System.out.println(chiFile);                              if(superStrategy.isAssignableFrom(clazz)){                                  eleStrategyList.add((Class
       ) clazz);                              }                              return true;                          }                          return false;                      }                  });                         }                    /**          * jar包查找          * @param packName          */          private void findClassJar(final String packName){              String pathName = packName.replace(".", "/");              JarFile jarFile  = null;              try {                  URL url = classLoader.getResource(pathName);                  JarURLConnection jarURLConnection  = (JarURLConnection )url.openConnection();                  jarFile = jarURLConnection.getJarFile();                } catch (IOException e) {                  throw new RuntimeException("未找到策略资源");              }                            Enumeration
       
         jarEntries = jarFile.entries();              while (jarEntries.hasMoreElements()) {                  JarEntry jarEntry = jarEntries.nextElement();                  String jarEntryName = jarEntry.getName();                                    if(jarEntryName.contains(pathName) && !jarEntryName.equals(pathName+"/")){                      //递归遍历子目录                      if(jarEntry.isDirectory()){                          String clazzName = jarEntry.getName().replace("/", ".");                          int endIndex = clazzName.lastIndexOf(".");                           String prefix = null;                            if (endIndex > 0) {                                prefix = clazzName.substring(0, endIndex);                            }                            findClassJar(prefix);                      }                      if(jarEntry.getName().endsWith(".class")){                          Class
         clazz = null;                          try {                              clazz = classLoader.loadClass(jarEntry.getName().replace("/", ".").replace(".class", ""));                          } catch (ClassNotFoundException e) {                              e.printStackTrace();                          }                          if(superStrategy.isAssignableFrom(clazz)){                              eleStrategyList.add((Class
        ) clazz);                          }                      }                  }                                }                          }                }
       
      
     

 

package com.MyUtils.file;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;


/**
 * 扫描包下路径
 * 包括本地文件和jar包文件
 * @author ljb
 *
 */
public class ScanningFile {

    private Class<?> superStrategy = String.class;//接口类class 用于过滤 可以不要

    private List<Class<? extends String>> eleStrategyList = new ArrayList<Class<? extends String>>();

    private ClassLoader classLoader = ScanningFile.class.getClassLoader();//默认使用的类加载器

    private static final String STARATEGY_PATH = "com.MyUtils.file";//需要扫描的策略包名

    public static void main(String[] args) {
        ScanningFile s = new ScanningFile();
        s.addClass();
    }

    /**
     * 获取包下所有实现了superStrategy的类并加入list
     */
    private void addClass(){
        URL url = classLoader.getResource(STARATEGY_PATH.replace(".", "/"));
        String protocol = url.getProtocol();
        if ("file".equals(protocol)) {
            // 本地自己可见的代码
            findClassLocal(STARATEGY_PATH);
        } else if ("jar".equals(protocol)) {
            // 引用jar包的代码
            findClassJar(STARATEGY_PATH);
        }
    }

    /**
     * 本地查找
     * @param packName
     */
    private void findClassLocal(final String packName){
        URI url = null ;
        try {
            url = classLoader.getResource(packName.replace(".", "/")).toURI();
        } catch (URISyntaxException e1) {
            throw new RuntimeException("未找到策略资源");
        }

        File file = new File(url);
        file.listFiles(new FileFilter() {

                public boolean accept(File chiFile) {
                    if(chiFile.isDirectory()){
                        findClassLocal(packName+"."+chiFile.getName());
                    }
                    if(chiFile.getName().endsWith(".class")){
                        Class<?> clazz = null;
                        try {
                            clazz = classLoader.loadClass(packName + "." + chiFile.getName().replace(".class", ""));
                        } catch (ClassNotFoundException e) {
                            e.printStackTrace();
                        }
                        System.out.println(chiFile);
                        if(superStrategy.isAssignableFrom(clazz)){
                            eleStrategyList.add((Class<? extends String>) clazz);
                        }
                        return true;
                    }
                    return false;
                }
            });

    }

    /**
     * jar包查找
     * @param packName
     */
    private void findClassJar(final String packName){
        String pathName = packName.replace(".", "/");
        JarFile jarFile  = null;
        try {
            URL url = classLoader.getResource(pathName);
            JarURLConnection jarURLConnection  = (JarURLConnection )url.openConnection();
            jarFile = jarURLConnection.getJarFile();
        } catch (IOException e) {
            throw new RuntimeException("未找到策略资源");
        }

        Enumeration<JarEntry> jarEntries = jarFile.entries();
        while (jarEntries.hasMoreElements()) {
            JarEntry jarEntry = jarEntries.nextElement();
            String jarEntryName = jarEntry.getName();

            if(jarEntryName.contains(pathName) && !jarEntryName.equals(pathName+"/")){
                //递归遍历子目录
                if(jarEntry.isDirectory()){
                    String clazzName = jarEntry.getName().replace("/", ".");
                    int endIndex = clazzName.lastIndexOf(".");
                    String prefix = null;
                    if (endIndex > 0) {
                        prefix = clazzName.substring(0, endIndex);
                    }
                    findClassJar(prefix);
                }
                if(jarEntry.getName().endsWith(".class")){
                    Class<?> clazz = null;
                    try {
                        clazz = classLoader.loadClass(jarEntry.getName().replace("/", ".").replace(".class", ""));
                    } catch (ClassNotFoundException e) {
                        e.printStackTrace();
                    }
                    if(superStrategy.isAssignableFrom(clazz)){
                        eleStrategyList.add((Class<? extends String>) clazz);
                    }
                }
            }

        }

     }

}