禁用tomcat缓存过滤器

  
    <!-- 去掉tomcat的etag和Last-Modified响应头的过滤器 -->
	<filter>
		<filter-name>noetag</filter-name>
		<filter-class>com.epoint.basic.filter.EpointNoETagFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>noetag</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

    此过滤器放在web.xml的过滤器后面即可    

package basic.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

/**
 * 
 * 禁用tomcat的ETag和Last-Modified响应头
 * 
 * @author Epoint
 * @version 2023年2月9日
 */
public class EpointNoETagFilter implements Filter
{

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        chain.doFilter(request, new HttpServletResponseWrapper((HttpServletResponse) response)
        {
            public void setHeader(String name, String value) {
                if (!"etag".equalsIgnoreCase(name) && !"Last-Modified".equalsIgnoreCase(name)) {
                    super.setHeader(name, value);
                }
            }
        });
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

}