Java Jar File Find getJarFile(@Nonnull Class<?> clazz)

Description

get Jar File

License

Apache License

Declaration

public static File getJarFile(@Nonnull Class<?> clazz)

Method Source Code


//package com.java2s;
/*/*from   ww  w. j av a  2 s .  co m*/
 * @(#)$Id$
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */

import java.io.File;

import java.io.UnsupportedEncodingException;

import java.net.URL;
import java.net.URLDecoder;

import javax.annotation.Nonnull;

public class Main {
    public static File getJarFile(@Nonnull Class<?> clazz) {
        File file = getClassFile(clazz);
        String path = file.getPath();
        final int idx = path.lastIndexOf('!');
        if (idx == -1) {
            return null;
        }
        String jarFilePath = path.substring(0, idx);
        if (jarFilePath.startsWith("file:\\")) {// workaround for windows
            jarFilePath = jarFilePath.substring(6);
        } else if (jarFilePath.startsWith("file:/")) {
            jarFilePath = jarFilePath.substring(5);
        }
        file = new File(jarFilePath);
        return file;
    }

    @SuppressWarnings("deprecation")
    @Nonnull
    public static File getClassFile(@Nonnull Class<?> clazz) {
        String className = clazz.getName();
        String path = getRelativeClassFilePath(className);
        URL url = clazz.getResource('/' + path);
        String absolutePath = url.getFile();
        String decoded = URLDecoder.decode(absolutePath);
        return new File(decoded);
    }

    public static File getClassFile(@Nonnull Class<?> clazz, ClassLoader cl) {
        String className = clazz.getName();
        String path = getRelativeClassFilePath(className);
        URL url = cl.getResource('/' + path);
        String absolutePath = url.getFile();
        final String decoded;
        try {
            decoded = URLDecoder.decode(absolutePath, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalStateException(e);
        }
        return new File(decoded);
    }

    @Nonnull
    public static String getRelativeClassFilePath(@Nonnull String className) {
        return className.replace('.', '/') + ".class";
    }
}

Java Jar File Find getJarFile(@Nonnull Class clazz)

Description

License

Declaration

Method Source Code

Related