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Maven项目启动报这个错cannot be cast to javax.servlet.Servlet 报错错误展示：严重: Exception starting filter charsetFilter java.lang.ClassCastException: org.springframework.web.filter.CharacterEncodingFilter cannot be

DEBUG 包c3p0错误项目使用C3P0数据库连接池，最近发现一个Exception：java.lang.Exception: DEBUG -- CLOSE BY CLIENT STACK TRACEat com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:566)at com.mchange