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Servlet过滤器

第十三双眼睛2019-06-23【Java】人已围观

简介每次要用Servlet中的过滤器的时候，都要取网上找，为了方便，就写在自己的博客中。

ServletFilter实现
public class MyFilter implements Filter {

@Override
public void destroy() {

}

@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest)arg0;
HttpServletResponse response = (HttpServletResponse)arg1;
//业务代码
arg2.doFilter(request, response);
}

@Override
public void init(FilterConfig arg0) throws ServletException {

}
}

然后再web.xml中进行配置即可
<filter>
   <filter-name>filter</filter-name>
   <filter-class>com.thirteen.java.MyFilter</filter-class>
</filter>
<filter-mapping>
   <filter-name>filter</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>