Java开发网 - URL小问题，郁闷了很久了啊，哪位帮忙？

Topic: URL小问题，郁闷了很久了啊，哪位帮忙？

1.URL小问题，郁闷了很久了啊，哪位帮忙？	Copy to clipboard
Posted by: jfml Posted on: 2003-06-02 15:15 URL url = A.class.getResource("xmls/books.xml"); System.out.println(url); File f = new File("xmls/books.xml"); 上面这段程序得到的url为null，但是file.exists()返回true 郁闷了很久了啊哪位帮助一下谢谢

2.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]

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Posted by: yakuu
Posted on: 2003-06-02 16:27

URL url = A.class.getResource("xmls/books.xml");
is found by your classloader, it must be in your classpath, so, you can use
URL url = A.class.getResource("/xmls/books.xml");
instead to find the file.
please take a look at javadoc about getResource(String name);

as far as File f = new File("xmls/books.xml");
it find your file use a abstract path.

3.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]	Copy to clipboard
Posted by: jfml Posted on: 2003-06-02 17:20 改成"/xmls/books.xml"以后返回的url还是为null啊请问这是为何？

4.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]	Copy to clipboard
Posted by: weichoon Posted on: 2003-06-03 22:56 make sure "/xmls/books.xml" appear in your classpath.

5.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]	Copy to clipboard
Posted by: jfml Posted on: 2003-06-04 09:34 也就是说要把xmls目录设定到project里的classpath么？

6.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]	Copy to clipboard
Posted by: jfml Posted on: 2003-06-04 09:38 还是不行啊把xmls目录设定到classpath中后还是同样的错误郁闷啊被这个问题烦了很久了啊

7.Re:URL小问题，郁闷了很久了啊，哪位帮忙？ [Re: CrazyJavar]

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Posted by: bean_wj
Posted on: 2003-06-05 10:58

把xmls目录放到classes下，然后改成：
java.net.URL url = WordProcessingTest.class.getResource("/xmls/books.xml");
System.out.println(url);
File f = new File("xmls/books.xml");
System.out.println(f.exists());

输出结果是：
file:/D:/testProject/classes/xmls/books.xml
false

另外，如果放在D:/testProject/xmls/books.xml，则f.exists()是true。