查找缺少的类在哪个包中

经常碰到编译时出现classNotFound的情况,可是面对一大堆jar文件,又不知该将哪一个加到classpath.有没有办法根据提示缺少的类名搜索在哪个jar包中呢?

下面的程序就是实现这个功能的.(做了一些改进,原文有点小错误)

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 getFilename() {
    return this.jarFiles;
  }

  protected String getClassName(ZipEntry entry){
    StringBuffer className=new StringBuffer(entry.getName().replace('/','.'));
    return className.toString();
  }
 
  public static void main(String args[]){
    if(args.length<2){
      System.out.println("Usage: FindInJar <ClassName> <Directory>");
      return;
    }
    String classname=args[0];
    String dirname=args[1];
    FindInJar findInJar=new FindInJar(classname);
    List jarFiles=findInJar.findClass(dirname,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));
      }
    }
  }
}
我在考虑将这个程序做成一个windows程序,采用可视化的操作界面,可以将要搜索的路径都添加进来,输入类名,

然后搜索.有时间再做吧.