// 注册功能 public boolean register(Users user) { Connection con = null; PreparedStatement ps = null; try { con = getConnection(); String sql = "insert into users(username,password,email) values(?,?,?)"; ps = con.prepareStatement(sql); ps.setString(1, user.getUsername());// 给sql语句的问号赋值 ps.setString(2, user.getPassword()); ps.setString(3, "aaa@qq.com"); int row = ps.executeUpdate(); if (row > 0) { return true; } } catch (SQLException ex) { ex.printStackTrace(); } finally { closeAll(con, ps, null); } return false; }
<body>
<form action="doregister.jsp" method="post">
用户名:<input type="text" name="uname" /><Br> 密码 ：<input
type="password" name="upwd" /><br> <input type="submit"
value="注册">
</form>
</body>
<body>
<%
request.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
Users users = new Users();
users.setUsername(uname);
users.setPassword(upwd);
UsersDao ud = new UsersDao();
if (ud.register(users)) {
request.getRequestDispatcher("index.jsp").forward(request, response);
} else
response.sendRedirect("register.jsp");
%>
</body>
doregister.jsp
<body>
<form action="dologin.jsp" method="post">
用户名:<input type="text" name="uname" value="小白" /><Br> 密码 ：<input
type="password" name="upwd" value="88888" /><br> 验证码:<input
type="text" name="validationCode"
onKeyDown="if(event.keyCode==13){form1.submit.focus();}" size="6">
<%
int intmethod1 = (int) ((((Math.random()) * 5)) + 1);
int intmethod2 = (int) ((((Math.random()) * 5)) + 1);
int intmethod3 = (int) ((((Math.random()) * 5)) + 1);
int intmethod4 = (int) ((((Math.random()) * 5)) + 1);
String intsum = intmethod1 + "" + intmethod2 + intmethod3 + intmethod4;
%>
<input type="hidden" name="validationCode1" value="<%=intsum%>">
<img style="height:20px;weight:20px" src="images/<%=intmethod1%>.png">
<img style="height:20px;weight:20px" src="images/<%=intmethod2%>.png">
<img style="height:20px;weight:20px" src="images/<%=intmethod3%>.png">
<img style="height:20px;weight:20px" src="images/<%=intmethod4%>.png">
<br> <input type="submit" value="登录">
</form>
</body>
index.jsp
<%
request.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
UsersDao ud = new UsersDao();
if (ud.login(uname, upwd)
&& request.getParameter("validationCode1").equals(request.getParameter("validationCode"))) {
//登录成功,创建User对象,并放入session
Users u = new Users();
u.setUsername(uname);
u.setPassword(upwd);
session.setAttribute("user", u);
request.getRequestDispatcher("main.jsp").forward(request, response);
} else
response.sendRedirect("index.jsp");
%>
dologin.jsp
