在javaEE中用表格做的登录页面。

最新推荐文章于 2021-06-28 20:35:32 发布

原创最新推荐文章于 2021-06-28 20:35:32 发布 · 2k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个简单的登录系统的实现过程，包括使用HTML创建登录界面、通过Servlet处理登录请求以及验证用户名和密码等内容。

1.没有连接数据库

login.jsp
<body>
    <h2>用户登录页面</h2>
    <form action="" method="post">
        <table border="1">    边框为1
            <tr>
                <td>账号</td>
                <td><input type="text",name="name"/></td>
            </tr>
            <tr>
                <td>密码</td>
                <td><input type="password",name="pass"/></td>
            </tr>
            <tr>
                合并
                <td colspan="2"><input type="submit",value="登录"/></td>
            </tr>
        <table>
    </form>
</body>


com.feicui.controller包
public class LoginServlet extends HTTPServlet{

    @Override
    public void dopost(HttpServletRequest request，
                HTTPServletResponse response){
        String name=request.getParameter("name");
        String pass=request.getParameter("pass");
        System.out.println("账号:"+name+",密码:"+pass);
        if("admin".equals(name)&&"123".equals(pass)){
            System.out.println("登录成功！");
            response.sendRedirect("index.jsp");
        }else{
            System.out.println("登录失败！");
            response.sendRedirect("login.jsp");
            
        }
    }
}

web.xml
<servlet>
    <servlet-name>login</servlet-name>
    <servlet-class>LoginServlet的路径</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>login</servlet-name>
    <url-pattern>/login</url-pattern>
</servlet-mapping>


login.jsp
<body>
    <h2>用户登录页面</h2>
    <form action="" method="post">
        <table border="1">    边框为1
            <tr>
                <td>账号</td>
                <td><input type="text",name="name"/></td>
            </tr>
            <tr>
                <td>密码</td>
                <td><input type="password",name="pass"/></td>
            </tr>
            <tr>
                合并
                <td colspan="2"><input type="submit",value="登录"/></td>
            </tr>
        <table>
    </form>
</body>


com.feicui.controller包
public class LoginServlet extends HTTPServlet{

    @Override
    public void dopost(HttpServletRequest request，
                HTTPServletResponse response){
        String name=request.getParameter("name");
        String pass=request.getParameter("pass");
        System.out.println("账号:"+name+",密码:"+pass);
        if("admin".equals(name)&&"123".equals(pass)){
            System.out.println("登录成功！");
            response.sendRedirect("index.jsp");
        }else{
            System.out.println("登录失败！");
            response.sendRedirect("login.jsp");
            
        }
    }
}

web.xml
<servlet>
    <servlet-name>login</servlet-name>
    <servlet-class>LoginServlet的路径</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>login</servlet-name>
    <url-pattern>/login</url-pattern>
</servlet-mapping>