javaurljar包_JavaJar文件：使用资源错误：URI不分层

我已将我的应用程序部署到jar文件。当我需要将数据从一个资源文件复制到jar文件外部时&＃xff0c;请执行以下代码&＃xff1a;

URL resourceUrl &＃61; getClass().getResource("/resource/data.sav");

File src &＃61; new File(resourceUrl.toURI()); //ERROR HERE

File dst &＃61; new File(CurrentPath()&＃43;"data.sav"); //CurrentPath: path of jar file don&＃39;t include jar file name

FileInputStream in &＃61; new FileInputStream(src);

FileOutputStream out &＃61; new FileOutputStream(dst);

// some excute code here

我遇到的错误是&＃xff1a;URI is not hierarchical。在IDE中运行时&＃xff0c;我不会遇到此错误。

如果我将上述代码更改为对StackOverFlow上其他帖子的一些帮助&＃xff0c;请执行以下操作&＃xff1a;

InputStream in &＃61; Model.class.getClassLoader().getResourceAsStream("/resource/data.sav");

File dst &＃61; new File(CurrentPath() &＃43; "data.sav");

FileOutputStream out &＃61; new FileOutputStream(dst);

//....

byte[] buf &＃61; new byte[1024];

int len;

while ((len &＃61; in.read(buf)) > 0) { //NULL POINTER EXCEPTION

//....

}