Example of implementing Ajax to verify whether the user name is available based on jQuery

This article mainly introduces in detail the example of implementing Ajax based on jQuery to verify whether the user name is available. It has certain reference value. Interested friends can refer to it.

The examples in this article are shared with you. jQuery ajax simple case - specific code to verify whether the user name is available, for your reference, the specific content is as follows

HTML

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 

The above is I compiled it for everyone, I hope it will be helpful to everyone in the future.

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