默认情况下，WEB-INF/classes中包含main源集(编译类和已处理资源)的输出.您的构建脚本会声明一个附加的源目录(src)，并保留默认的资源目录.您在src/main/java或src/main/resources下是否有文件?

By default, what goes into WEB-INF/classes is the output of the main source set (compiled classes and processed resources). Your build script declares an additional source directory (src), and keeps the default resource directory. Do you have any files under src/main/java or src/main/resources?