@WebServlet(urlPatterns = "/form")
public class FormServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
response.getWriter().write("哈哈");
System.out.println(username);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
}
@WebFilter(urlPatterns = "/*")
public class ChinaFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
//在过滤器中,设置request对象的编码表
servletRequest.setCharacterEncoding("utf-8");
//设置response缓冲区的编码表,通知浏览器的解码
servletResponse.setContentType("text/html;charset=utf-8");
//放行
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {}
}
<body>
<form action="${pageContext.request.contextPath}/form" method="post">
<input type="text" name="username">
<input type="submit">
</form>
</body>
