用EL表达式控制页面风格（根据登陆者身份）

来源：互联网发布：c语言应用范围编辑：程序博客网时间：2024/05/16 09:19

<body bgcolor="${requestScope.bg}" onload="${requestScope.welcome}"> <h${requestScope.h}>登录 </h${requestScope.h}> <form name="form1" method="post" action="loginservlet" onsubmit="return check()"> <br> 用户名：<input type="text" name="name" /> <br> <input type="submit" name="Submit" value="${empty requestScope.name?"提交":name}"> <input type="reset" value="Reset"><br /> ${requestScope.err}<br /> ${empty param.name?"":name} </form> </body>

loginservlet 的代码：

String name = request.getParameter("name"); if (name.equals("xiaoxiao")) { String err="<a href='login.jsp'>返回</a> "; request.setAttribute("err",err); request.setAttribute("bg", "red"); request.setAttribute("h", "1"); request.setAttribute("welcome", "alert('欢迎您的登录！')"); request.setAttribute("name","登陆成功，欢迎小小"); request.getRequestDispatcher("login.jsp?name=123").forward(request, response); } else { String err="<a href='login.jsp'>返回</a> "; request.setAttribute("err",err); request.setAttribute("bg", "blue"); request.setAttribute("h", "3"); request.setAttribute("name",name); request.setAttribute("welcome", "alert('欢迎BOY的登录！');"); request.getRequestDispatcher("login.jsp").forward(request, response); }

程序虽然简单但是可以举一反三在很多地方应该很有用处，拿来和大家分享