/** 获取用户列表数据 */
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// 设置编码-解决中文乱码
resp.setCharacterEncoding("utf-8");
UserService userService = new UserService();
List<User> users = userService.getAllUser();
Gson gson = new Gson();
String userJson = gson.toJson(users); // 将List<User>集合中的User转换成json格式的字符串数据
// System.out.println(userJson);
// 将json格式的用户列表返回的浏览器端
PrintWriter out = resp.getWriter();
out.write(userJson);
}
/** 处理登录请求 */
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
/** 用户服务 */
UserService userService = new UserService();
String username = (String) req.getParameter("username");
String password = req.getParameter("password");
User user = userService.login(username, password);
if (user == null) { // 登录失败，跳转到登录页面
req.setAttribute("error", "用户名或密码错误！");
req.getRequestDispatcher("/login.jsp").forward(req, resp); // 请求转发
} else { // 登录成功，跳转到成功页面
// 登录成功，将用户信息放入session中
HttpSession session = req.getSession();
session.setAttribute("user", user);
resp.sendRedirect(req.getContextPath() + "/users.jsp");
}
}