在jar中查找类

java 代码

import
 java.util.*;
import
 java.io.*;

public
 
class
 FindJar
{
    public
 
static
 
int
 count = 
0
;

    public
 FindJar()
    {}

    private
 
static
 
void
 FindClassInLocalSystem(String path, String classname)
    {
        if
 (path.charAt(path.length() - 
1
) != '\\')
        {
            path += '\\';
        }
        File file = new
 File(path);
        if
 (!file.exists())
        {
            System.out.println("Error: Path not Existed! Please Check it out!"
);
            return
;
        }
        String[] filelist = file.list();
        for
 (
int
 i = 
0
; i < filelist.length; i++)
        {
            File temp = new
 File(path + filelist[i]);
            if
 ((temp.isDirectory() && !temp.isHidden() && temp.exists()))
            {
                FindClassInLocalSystem(path + filelist[i], classname);
            }
            else
            {
                if
 (filelist[i].endsWith(
"jar"
))
                {
                    try
                    {
                        java.util.jar.JarFile jarfile = new
 java.util.jar.JarFile(
                                path + filelist[i]);
                        for
 (Enumeration e = jarfile.entries(); e
                                .hasMoreElements();)
                        {
                            String name = e.nextElement().toString();
                            if
 (name.equals(classname))
                            {
                                System.out.println("No."
 + ++FindJar.count);
                                System.out.println("Jar Package:"
 + path
                                        + filelist[i]);
                                System.out.println(name);
                            }
                        }
                    }
                    catch
 (Exception eee)
                    {}
                }
            }
        }
    }

    static
 
public
 
void
 main(String[] args)
    {
        if
 (args.length < 
2
)
        {
            showHowToUsage();
            return
;
        }
        String absoluteclassname = args[1
].replace(
'.'
, '/') + 
".class"
;

        System.out.println("Find class ["
 + args[
1
] + 
"] in Path ["
 + args[
0
]
                + "] Results:"
);
        FindClassInLocalSystem(args[0
], absoluteclassname);
        if
 (FindJar.count == 
0
)
        {
            System.out.println("Error:Can't Find Such Jar File!"
);
        }
        System.out
                .println("Find Process Ended! Total Results:"
 + FindJar.count);
    }

    public
 
static
 
void
 showHowToUsage()
    {
        System.out
                .println("Usage: Java -cp. JarClassFind <source path> <source class name>"
);
        System.out
                .println("Usage: Java -classpath. JarClassFind <source path> <source class name>"
);
        System.out.println(""
);
        System.out.println("<source path>:\t\tPath to Find eg:D:\\Jbuilder"
);
        System.out
                .println("<source class name>:\tClass to Find eg:java.applet.Applet"
);
    }
}