第一个文件
package chapter3.servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@WebServlet(name = "LogingRedirectServlet",urlPatterns = "/logingredirectservlet")
public class LogingRedirectServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
String un = request.getParameter("username");
String pw = request.getParameter("password");
//判断验证码是否正确，一个窗体输入，一个服务器端生成
if("admin".equals(un)&&"123".equals(pw)){
getServletContext().setAttribute("username",un);
response.sendRedirect(request.getContextPath()+"/index.jsp");
}
else{
response.sendRedirect(request.getContextPath()+"/chapter3/jsp/login_imagecode.jsp");
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request,response);
}
}
第二个文件
第三个文件
第四个文件
