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 {

    }

}