GlobalDbSetting优化默认配置读取规则，优先读取文件而非jar中的文件（issue#900@Github）

hutool-core/src/main/java/cn/hutool/core/io/resource/FileResource.java

@@ -79,6 +79,9 @@ public class FileResource implements Resource, Serializable {
 
 	@Override
 	public InputStream getStream() throws NoResourceException {
+		if (!this.file.exists()) {
+			throw new NoResourceException("File [{}] not exist!", this.file.getAbsolutePath());
+		}
 		return FileUtil.getInputStream(this.file);
 	}