package servlet;import javax.servlet.*;import javax.servlet.annotation.WebFilter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;@WebFilter(filterName = "FilterCoding",urlPatterns = "/*")public class FilterCoding implements Filter {    public void destroy() {    }    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {        HttpServletRequest request = (HttpServletRequest) req;        HttpServletResponse response = (HttpServletResponse) resp;                // 解决post方式提交中文乱码问题，        // 在tomcat8及以上版本，get方式提交不存在中文乱码问题        if ("post".equalsIgnoreCase(request.getMethod())){            request.setCharacterEncoding("utf-8");        }                // 解决响应中文乱码问题        response.setContentType("text/html;charset=utf-8");        // 放行请求与响应        chain.doFilter(request, response);    }    public void init(FilterConfig config) throws ServletException {    }}