findinjar.java

在某一个文件夹中查找是否存在某一个类文件

package com.test;

import java.io.File;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class FindInJar {
	public String className;

	public ArrayList jarFiles = new ArrayList();

	public FindInJar() {
	}

	public FindInJar(String className) {
		this.className = className;
	}

	public void setClassName(String className) {
		this.className = className;
	}

	public List findClass(String dir, boolean recurse) {
		searchDir(dir, recurse);
		return this.jarFiles;
	}

	protected void searchDir(String dir, boolean recurse) {
		try {
			File d = new File(dir);
			if (!d.isDirectory()) {
				return;
			}
			File[] files = d.listFiles();
			for (int i = 0; i < files.length; i++) {
				if (recurse && files[i].isDirectory()) {
					searchDir(files[i].getAbsolutePath(), true);
				} else {
					String filename = files[i].getAbsolutePath();
					if (filename.endsWith(".jar") || filename.endsWith(".zip")) {
						ZipFile zip = new ZipFile(filename);
						Enumeration entries = zip.entries();
						while (entries.hasMoreElements()) {
							ZipEntry entry = (ZipEntry) entries.nextElement();
							String thisClassName = getClassName(entry);
							//System.out.println(thisClassName);
							if (thisClassName.equals(this.className)
									|| thisClassName.equals(this.className
											+ ".class")) {
								this.jarFiles.add(filename);
								System.out.println("filename="+filename+";"+thisClassName);
							}
						}
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public List getFilenames() {
		return this.jarFiles;
	}

	protected String getClassName(ZipEntry entry) {
		StringBuffer className = new StringBuffer(entry.getName().replace('/',
				'.'));
		return className.toString();
	}

	public static void main(String args[]) {
		FindInJar findInJar = new FindInJar(
				"com.ibm.websphere.naming.WsnInitialContextFactory");
		List jarFiles = findInJar.findClass(
				"D:/Program Files/IBM/WebSphere/AppServer", true);
		if (jarFiles.size() == 0) {
			System.out.println("Not Found");
		} else {
			for (int i = 0; i < jarFiles.size(); i++) {
				System.out.println(jarFiles.get(i));
			}
		}
	}
}