今天和往常一样打开项目，竟然报错problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError，
查阅了很多资料，有的说是包重复，有的说是web.xml配置重复，有的说是spring配置错误，有的说是jar包重复，费了我好长时间。
后来抱着试一试的态度，我把项目clean了一下，然后重新编辑竟然通过了，真是很无语，希望可以帮到大家！
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