package cn.edu.seig.javaee.servlet;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
public class LoginServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html;charset=UTF-8");
req.setCharacterEncoding("utf-8");
// 获取用户输入的用户名和密码
String username = req.getParameter("username");
String password = req.getParameter("password");
// 判断用户名和密码是否匹配
if ("seig".equals(username) && "123456".equals(password)) {
// 登录成功，返回页面显示成功信息
PrintWriter out = resp.getWriter();
out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");
out.println("<html xmlns=\"http://www.w3.org/1999/xhtml\">");
out.println("<html>");
out.println("<head><title>登录成功</title></head>");
out.println("<body>");
out.println("<h2>登录成功，欢迎！</h2>");
out.println("</body>");
out.println("</html>");
} else {
// 根据实际情况显示登录失败信息
PrintWriter out = resp.getWriter();
out.println("<html>");
out.println("<head><title>登录失败</title></head>");
out.println("<body>");
out.println("<h2>用户名不存在或密码错误</h2>");
out.println("</body>");
out.println("</html>");
}
}
}
Servlet_Idea.zip （28个子文件） 
Servlet_Idea.iml 949B
src main java cn edu seig javaee servlet WelcomeGetServlet.java 1KB WelcomePostServlet.java 1KB WelcomeServlet.java 1KB LoginServlet.java 2KB out artifacts Servlet_Idea_war_exploded WEB-INF classes cn edu seig javaee servlet WelcomeServlet.class 1KB WelcomeGetServlet.class 2KB LoginServlet.class 2KB WelcomePostServlet.class 2KB web.xml 1KB index.jsp 301B
get.html 370B post.html 376B login.html 542B production Servlet_Idea cn edu seig javaee servlet WelcomeServlet.class 1KB WelcomeGetServlet.class 2KB LoginServlet.class 2KB WelcomePostServlet.class 2KB web WEB-INF web.xml 1KB index.jsp 301B get.html 370B post.html 376B login.html 542B .idea artifacts Servlet_Idea_war_exploded.xml 523B workspace.xml 9KB misc.xml 238B modules.xml 271B .gitignore 184B资源评论
