在JSP中使用JavaBean时发生异常
[英]Exception while using JavaBean in JSP
问题描述
I can't solve this problem can you help me please. 
我无法解决这个问题，请您能帮我。
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="musteri" class="beanler.MusteriBean" scope="request" ></jsp:useBean>
<%musteri.setIsim("Ferid");%>
<%=musteri.getIsim() %>
</body>
</html>
EXCEPTION: SEVERE: Servlet.service() for servlet [jsp] in context with path [/Servlet_Projesi] threw exception [/beanTest.jsp (line: 11, column: 0) The value for the useBean class attribute beanler.MusteriBean is invalid.] with root cause org.apache.jasper.JasperException: /beanTest.jsp (line: 11, column: 0) The value for the useBean class attribute beanler.MusteriBean is invalid.
package beanler;
public class MusteriBean {
private String isim;
private String soyad;
public String getIsim() {
return isim;
}
public void setIsim(String isim) {
this.isim = isim;
}
public String getSoyad() {
return soyad;
}
public void setSoyad(String soyad) {
this.soyad = soyad;
}
}
3 个解决方案
解决方案1
1 已采纳 2012-01-31 13:58:46
try to set the property by using <jsp:setProperty> 尝试使用<jsp:setProperty>设置属性
<jsp:useBean id="musteri" class="beanler.MusteriBean" scope="request" >
<jsp:setProperty name="musteri" property="isim" value=" Ferid" />
</jsp:useBean>
while displaying you can use <%=musteri.getIsim() %> 在显示时可以使用<%=musteri.getIsim() %>
解决方案2
1 2012-01-31 14:04:37
Two points you can give a try. 您可以尝试两点。
[1]Initialise your class properties like [1]初始化您的课程属性，例如
private String isim = null;
private String soyad = null;
[2][Not mandatory]implement Serializable like [2] [非强制]实现可序列化，例如
public class MusteriBean implements java.io.Serializable
解决方案3
1 2012-01-31 14:13:56
I also found another solution. 我还找到了另一种解决方案。
<jsp:useBean id="musteri" class="beanler.MusteriBean" scope="request" ></jsp:useBean>
I changed it to: 我将其更改为：
<jsp:useBean id="musteri" class="beanler.MusteriBean" scope="request" />
and that works.. 那行得通..
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.