register.jsp
<%@ page contentType="text/html;charset=gb2312" %>
<head>
<a href =register.jsp>注册</a >
<a href = login.jsp> 登录</a >
</head>
<jsp:useBean id="User" class="sea.water.User" scope="session">
</jsp:useBean>
<HTML><body >
<form action="" method=post name=form>
请注册：<br>
请输入账号:<input type=text name="name" size=12><br>
请输入密码:<input type="text" name="pass" size=12>
<br> <input type="submit" value="注册" name="submit">
</form>
<jsp:setProperty name="User" property="*"/>
</BODY></HTML>
<%
String s=request.getParameter("name");
if(s==null) out.print("没有注册");
else out.print("注册成功");
%>
login.jsp
<%@ page contentType="text/html;charset=gb2312" %>
<a href =register.jsp>注册</a >
<a href = login.jsp> 登录</a >
<jsp:useBean id="User" class="sea.water.User" scope="session">
</jsp:useBean>
<HTML><body bgcolor=cyan>
<form action="" method=post name=form>
请输入账号:<input type=text name="name" size=12><br>
请输入密码:<input type="text" name="pass" size=12>
<br> <input type="submit" value="登录" name="submit">
</form>
<jsp:getProperty name="User" property="name"/>
<jsp:getProperty name="User" property="pass"/>
<%
String number1=request.getParameter("name");
String pass1=request.getParameter("pass");
String a=User.getName();
String b=User.getPass();
if(number1==null||number1.length()==0||pass1==null||pass1.length()==0){
out.write("不能为空");
}
else if(a.equals(number1)&&b.equals(pass1)){
out.write("账号和密码一致，登录成功");
}
%>
</body></HTML>
User.java
package sea.water;
import java.io.*;
public class User{
String name;
String pass;
public String getName() {
return name;
}
public void setName(String newName) {
name = newName;
}
public String getPass() {
return pass;
}
public void setPass(String newPass) {
pass = newPass;
}
}
报错
类型 异常报告
消息 在[sea.water.User]类型bean中找不到任何有关属性[name]的信息
描述 服务器遇到一个意外的情况，阻止它完成请求。
例外情况
org.apache.jasper.JasperException: 在[sea.water.User]类型bean中找不到任何有关属性[name]的信息 org.apache.jasper.runtime.JspRuntimeLibrary.getReadMethod(JspRuntimeLibrary.java:818) org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1230) org.apache.jasper.compiler.Node$GetProperty.accept(Node.java:1130)
