JSP-ServLet 一个简单的密码核对
First Step:
Create One Jsp file: Login.jsp
<body>
This is my JSP page. <br>
<form action=" LoginServlet" method="post">
<table>
<tr><td>Login</td><td><input type="text" name="username" value=""/></td></tr>
<tr><td>Password</td><td><input type="password" name="pwd" value=""/></td></tr>
<tr><td><input type="submit" name="sub" value="Submit"/></td><td><input type="Reset" name="Ret" value="Reset"/></td></tr>
</table>
</form>
</body>
Second Step:
Create One ServLet File: LoginServLet.java
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name =request.getParameter("username");
String password=request.getParameter("pwd");
HttpSession session=request.getSession();
if (name.equals("dgy")&&password.equals("123")){
System.out.println("login Successfully");
session.setAttribute("username",name);
session.setAttribute("password",password);
request.getRequestDispatcher("LoginSuccess.jsp").forward(request, response);
}else{
System.out.println("Oops!!! pls correct");
response.sendRedirect(" Login.jsp");
}
}
Third Step:
Creat another jsp: LoginSuccess.jsp
<body>
This is my JSP page. <br>
Username:${username}
Password:${password}
</body>
Create One Jsp file: Login.jsp
<body>
This is my JSP page. <br>
<form action=" LoginServlet" method="post">
<table>
<tr><td>Login</td><td><input type="text" name="username" value=""/></td></tr>
<tr><td>Password</td><td><input type="password" name="pwd" value=""/></td></tr>
<tr><td><input type="submit" name="sub" value="Submit"/></td><td><input type="Reset" name="Ret" value="Reset"/></td></tr>
</table>
</form>
</body>
Second Step:
Create One ServLet File: LoginServLet.java
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name =request.getParameter("username");
String password=request.getParameter("pwd");
HttpSession session=request.getSession();
if (name.equals("dgy")&&password.equals("123")){
System.out.println("login Successfully");
session.setAttribute("username",name);
session.setAttribute("password",password);
request.getRequestDispatcher("LoginSuccess.jsp").forward(request, response);
}else{
System.out.println("Oops!!! pls correct");
response.sendRedirect(" Login.jsp");
}
}
Third Step:
Creat another jsp: LoginSuccess.jsp
<body>
This is my JSP page. <br>
Username:${username}
Password:${password}
</body>