Java获取Jar包路径

                              
                                public class JarUtil
                                {
                                    private String jarName;
                                    private String jarPath;
                                         
                                    public JarUtil(Class clazz)
                                    {
                                        String path = 
                                clazz.getProtectionDomain().getCodeSource().getLocation()
                                                .getFile();
                                        try
                                        {
                                            path = 
                                java.net.URLDecoder.decode(path, "UTF-8");
                                        }
                                        catch 
                                (java.io.UnsupportedEncodingException e)
                                        {
                                            e.printStackTrace();
                                        }
                                        java.io.File jarFile = new 
                                java.io.File(path);
                                        this.jarName = jarFile.getName();
                                        java.io.File parent = 
                                jarFile.getParentFile();
                                        if (parent != null)
                                        {
                                            this.jarPath = 
                                parent.getAbsolutePath();
                                        }
                                    }
                                    /**
                                     * 获取Class类所在Jar包的名称
                                     * 
                                     * @return Jar包名 (例如：C:\temp\demo.jar 则返回 
                                demo.jar )
                                     */
                                    public String getJarName()
                                    {
                                        try
                                        {
                                            return 
                                java.net.URLDecoder.decode(this.jarName, 
                                "UTF-8");
                                        }
                                        catch 
                                (java.io.UnsupportedEncodingException e)
                                        {
                                            e.printStackTrace();
                                        }
                                        return null;
                                    }
                                    /**
                                     * 取得Class类所在的Jar包路径
                                     * 
                                     * @return 返回一个路径 (例如：C:\temp\demo.jar 则返回 
                                C:\temp )
                                     */
                                    public String getJarPath()
                                    {
                                        try
                                        {
                                            return 
                                java.net.URLDecoder.decode(this.jarPath, 
                                "UTF-8");
                                        }
                                        catch 
                                (java.io.UnsupportedEncodingException e)
                                        {
                                            e.printStackTrace();
                                        }
                                        return null;
                                    }
                                    public static void main(String[] args) 
                                throws Exception
                                    {
                                        JarUtil ju = new JarUtil(JarUtil.class);
                                        System.out.println("Jar name: " + 
                                ju.getJarName());
                                        System.out.println("Jar path: " + 
                                ju.getJarPath());
                                    }
                                }