Question

java.lang.ClassNotFoundException: com.itheima.web.filter.MyFilter为什么找不到配置文件没有问题啊？

<filter>
<filter-name>myFilter</filter-name>
<filter-class>com.itheima.web.filter.MyFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>myFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
public class MyFilter implements Filter {
public void destroy() {}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
chain.doFilter(request, response);
HttpServletRequest req=(HttpServletRequest) request;
req=new MyRequest(req); //把HttpServletRequest包装成MyRequest
chain.doFilter(req,response);
}
public void init(FilterConfig fConfig) throws ServletException {} }

Answer 1

如果这个filter不是自定义的filter，那么可能是没有导入相关的jar包；

追问

myFilter是自定义的

追答

那肯定是你的filter定义有错误啊，你可以看看在servlet、springmvc、sturts2中分别是如何定义的（就是说要继承或者实现什么）。

追问

实现filter了