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                Java中取資源時,經常用到Class.getResource和ClassLoader.getResource。昨天老師講解題目時候,問我們為什么你們都是在文件前家上"/": ~~~ String path = Resources.class.getResource("/a.txt").getPath(); ~~~ 注:在Resources文件下創建了a.txt文件 我想我反正是試出來的,不使用"/"不行。為了正式解答心中的疑惑,我們正式來看看Resources路徑問題。 ### 1\. Class.getResource(String path) ~~~ path不以’/'開頭時,默認是從此類所在的包下取資源; path以’/'開頭時,則是從ClassPath根下獲取; ~~~ ~~~ System.out.println("path:"+Resources.class.getResource("/")); System.out.println("path:"+Resources.class.getResource("")); ~~~ 輸出結果: path:file:/home/xiaosi/Study/lectures/target/classes/ path:file:/home/xiaosi/Study/lectures/target/classes/com/qunar/lectures/ ### 2\. ClassLoder.getClassLoder.getResource(String path) ~~~ path不能以’/'開頭時; path是從ClassPath根下獲取; ~~~ ~~~ System.out.println(r.getClass().getClassLoader().getResource("")); System.out.println(r.getClass().getClassLoader().getResource("/"));//null ~~~ 輸出結果: file:/home/xiaosi/Study/lectures/target/classes/ null
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