import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class MainServlet1 extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//设置请求编码
request.setCharacterEncoding("utf-8");
//设置响应格式
response.setContentType("text/html;charset=utf-8");
//请求参数获取
String uname=request.getParameter("uname");
//响应输出
response.getWriter().println("<html>");
response.getWriter().println("<head>");
response.getWriter().println("<title>主页</title>");
response.getWriter().println("</head>");
response.getWriter().println("<body>");
response.getWriter().println("<h3>欢迎"+uname+"</h3>");
response.getWriter().println("<hr/>");
response.getWriter().println("</body>");
response.getWriter().println("</html>");
}
}
https://www.csdn.net/gather_14/MtTakgzsMjcxMTEtZG93bmxvYWQO0O0O.html
你的xml文件设置好了吗？如果没设置可百度servlet xml文件设置，如果不设置会找不到，具体错误又是什么？