在目录中查找java类位于哪个jar包中

在目录中查找java类位于哪个jar包中,这个是我从网上查钱的资料，试了一下，很不错。

 

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);                            if (thisClassName.equals(this.className) || thisClassName.equals(this.className + ".class")) {                                this.jarFiles.add(filename);                            }                        }                    }                }            }        } 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.microsoft.sqlserver.jdbc.SQLServerDriver");        List jarFiles = findInJar.findClass("D:/workspace/CiscoYearendTool/WebRoot/WEB-INF/lib", 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));            }        }    }}