2024/1/30安卓开发五
设计注册页面，并对输入的值进行一个简单的初步判断。
<html>
<head>
<title>账号注册</title>
</head>
<body>
<h1>注册</h1>
<div style="text-align: center">
<form method="post" id="register" action="register-servlet">
用户名:<input type="text" name="nameid" id="nameid"><br><br>
 密码:<input type="password" name="pwd1" id="pwd1"><br><br>
再输入一次密码:<input type="password" name="pwd2" id="pwd2">    <br><br>
<span id="msg" style="font-size: 12px;color:red">${msg}</span><br><br>
<button type="button" id="btm">注册</button>
</form>
<script>
document.getElementById("btm").addEventListener("click",function () {
var nameid=document.getElementById("nameid").value;
var pwd1=document.getElementById("pwd1").value;
var pwd2=document.getElementById("pwd2").value;
if(!is(nameid))
{
document.getElementById('msg').innerHTML="您要注册的用户名不能为空";
return;
}
if(!is(pwd1))
{
document.getElementById('msg').innerHTML="您的密码不能为空";
return;
}
if(!is(pwd2))
{
document.getElementById('msg').innerHTML="您第二次密码输入的不能为空";
return;
}
if(pwd1!==pwd2)
{
document.getElementById('msg').innerHTML="您两次密码输入不一致";
return;
}
var a=confirm("确认注册嘛？");
if(!a)
{
return;
}
else document.getElementById("register").submit();
})
function is(s)
{
if (s.length==0||s.trim()=="")
return false;
else return true;
}
</script>
</div>
</body>
</html>
然后在servlet里进行数据库操作，并返回一个消息到我们的登录界面。
package com.example.demo;
import bean.Base_InformationBean;
import bean.InfoDAO;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@WebServlet(value="/register-servlet")
public class registerServlet extends HttpServlet {
private String code;
private String password;
private Base_InformationBean hhh;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
code=request.getParameter("nameid");
password=request.getParameter("pwd1");
hhh=new Base_InformationBean();
hhh.setCode(code);
hhh.setPassword(password);
new InfoDAO().register(hhh);
request.setAttribute("msg","注册完成");
try {
request.getRequestDispatcher("index.jsp").forward(request,response);
} catch (ServletException e) {
throw new RuntimeException(e);
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.setContentType("text/html");
doGet(request,response);
}
}
这样我们就完成了用户的注册操作。
