jQuery+Ajax authenticates users

This time I will bring you jQuery Ajax user verification. What are the precautions for jQuery Ajax user verification? The following is a practical case, let’s take a look.

LoginServlet

public class LoadServlet extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // 解决乱码
  request.setCharacterEncoding("utf-8");
  response.setCharacterEncoding("utf-8");
  // 1.得到用户名
  String username = request.getParameter("username");
  // 2.判断用户名是否可以使用
  if ("tom".equals(username)) {
   // 用户名不可以使用
   response.getWriter().write("用户名被占用");
  } else {
   // 用户名可以使用
   response.getWriter().write("用户名可以使用");
  }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  doGet(request, response);
 }
}

web.xml

 
 LoadServlet
 LoadServlet
 
 com.zxl.servlet.LoadServlet
 
 
 LoadServlet
 /load
 

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

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