/**
     * @param args
     */
    public static void main(String[] args) {
        File directory = new File("");//設(shè)定為當(dāng)前文件夾
        System.out.println(directory.getAbsolutePath());//獲取絕對(duì)路徑
        System.out.println(directory.getPath()); //獲得new File()時(shí)設(shè)定的路徑
        System.out.println(System.getProperties());
        
        /**
         * class.getClassLoader().getResourceAsStream($path), 其中$path默認(rèn)是src源路徑，maven項(xiàng)目一般配置了多個(gè)源路徑
         * 例如：maven項(xiàng)目的源路徑為：src/main/java，src/main/resources,src/test/java,src/test/resources,在此四個(gè)源
         * 路徑下的文件可以直接寫文件名即可讀取
         */
        System.out.println(Thread.currentThread().getContextClassLoader().getResource("com/wpy/json/data.properties"));
        System.out.println(Thread.currentThread().getContextClassLoader().getResource("db.properties"));
        System.out.println(Thread.currentThread().getContextClassLoader().getResource("src/test/java/file1.properties"));
        System.out.println(Thread.currentThread().getContextClassLoader().getResource("file2.properties"));
        System.out.println(Thread.currentThread().getContextClassLoader().getResource("file3.properties"));
        ClassLoader classloader = Thread.currentThread().getContextClassLoader();
        System.out.println(classloader);

        if (classloader == null) {
            Properties iframeproperties = new Properties();
            classloader = iframeproperties.getClass().getClassLoader();
        }
        System.out.println(classloader);
        
        try {
            System.out.println(directory.getCanonicalPath());//獲取標(biāo)準(zhǔn)的路徑
        } catch (IOException e) {
            e.printStackTrace();
        }
        
    }

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}