我试图解释web应用程序的基本原理。我在META-INF和WEB-INF上遇到了这个问题。这些目录是如何获得这些名称的？
Jar文件实际上是包含额外信息和可能更好的索引的ZIP文件。将额外信息打包到ZIP文件中时，将其放置在不太可能与普通ZIP文件内容冲突的位置变得很重要。
选择META-INF作为可以存储JAR文件信息的目录，是试图将目录用作ZIP文件中的名称空间。基本上，如果它存储在META-INF中，它就是元数据信息，或者（在元数据的可能含义中挑选），“自我信息”或“抽象信息”。
这允许在不破坏ZIP文件封装的情况下，在ZIP文件本身中存储会影响ZIP文件处理的信息。这是关键，因为它避免了创建一种新的、可移植的压缩格式并将其推广到Java代码打包的目的。随着人们习惯了META-INF的实用程序，ZIP文件中为特定的打包格式创建了新的“名称空间”，例如“WEB-INF”。
ZIP文件格式的第一个“扩展名”是添加清单（manifest.MF）和可选的索引列表（以加快项目提取）。现在，这样的文件（由于具有已知的扩展名空间）已经能够以许多其他方式进行扩展，比如最近添加了用于服务注册的子目录“services”。
当您考虑ZIP文件包含文件和目录时，只有将目录用作名称空间才有意义。
如果我没记错的话，meta-inf就是元信息。这可能是完全错误的。如果这是正确的，你可能会猜测web inf是用于web信息的：-P
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