标签：att type setattr intel post lan log for 错误
刚才使用request.getAttribute();时候无法获取到值，一直为null，经过分析，得到下面的
index1.jsp
<%-- Created by IntelliJ IDEA. User: 亦清 Date: 2019/7/16 Time: 12:56 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>用户登录索引</title> </head> <body> <% try{ int money=100; int b=0; request.setAttribute("result",money/0); }catch (Exception e){ request.setAttribute("result","页面出现错误"); } %> <jsp:forward page="login.jsp"/> <%--<a href="login.jsp?name=321&password=qqqq">跳转界面</a>--%> </body> </html>
login.jsp
<%-- Created by IntelliJ IDEA. User: 亦清 Date: 2019/7/16 Time: 12:56 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <% String name = request.getParameter("name"); String password = request.getParameter("password"); %> <html> <head> <title>登陆</title> </head> <body> <% String result = (String)request.getAttribute("result"); %> <%=result%> <form name="form1" action="" method="post"> 用户名 <input type="text" name="name" style="width:120px" value="<%=name%>"><br> 密 码 <input type="password" name="password" value="<%=password%>" style="width:120px"><br> <input type="submit" value="提交"> </form> </body> </html>
1.第一个request.setAttribute();的jsp片段所放的位置必须和login.jsp当中一样，就是要放在body标签就都放在body里面，不然会得到Nul，
2.index.jsp一旦点击a标签跳转到login.jsp，也会获取到null，
很奇怪，暂时放着
标签：att type setattr intel post lan log for 错误
原文地址：https://www.cnblogs.com/eenio/p/11194410.html
