解决问题记录：filter发布到tomcat时报错

java.lang.AbstractMethodError: com.filter.LoginFilter.init(Ljavax/servlet/FilterConfig；)V

报错截图如图所示：

解决：

这个问题应该是tomcat的问题，我这边在实现Filter方法时，只重写了一个doFilter，但是实现Filter接口时，除了要重写doFilter方法，还需要重写init和destroy方法。加上重新运行即可

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解决问题记录：filter发布到tomcat时报错

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