运行JSP页面出错：Can't find a method to write property 'message' of type 'java.lang.Str

rubyt 2011-02-11 09:35:35

运行JSP页面出错：

org.apache.jasper.JasperException: Can't find a method to write property 'message' of type 'java.lang.String' in a bean of type 'com.inspiresky.bean.Hello'
org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:370)
org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:308)
org.apache.jsp.mytest_jsp._jspService(mytest_jsp.java:66)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.10 logs.

我一共建了2个文件：

Hello.java：

package com.inspiresky.bean;

public class Hello {
private String message = "12345";
public String getMessage(){
return message;

}
public void setMessgae(String message){
this.message =message;
}
}

mytest.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<jsp:useBean id="hello" class="com.inspiresky.bean.Hello" scope="page" />
<jsp:setProperty name="hello" property="message" value="12345"/>

<html>
<head>

<title>My JSP 'mytest.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<body>
<jsp:getProperty name="hello" property="message" /> 
This is my JSP page. 
</body>
</html>

请问大家是什么问题？

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卡卡西CC 2012-05-30

同意11楼

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senlypan1 2012-05-30

Hello.java 中，

public void setMessgae(String message){
this.message =message;
}

这个方法的名字出错，不是 setMessgae ，而是 setMessage
然后最好加上无参构造函数，使当tomcat或者其他容器加载创建时不会出错！

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music_mouse 2011-02-11

这个值一般是用于对对象的属性赋值的。。如果你Name是一个对象，property里面指出它的属性名。在后台就会自动对这个对象的属性做赋值。应该是这样的

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rubyt 2011-02-11

那还用后面的property 干嘛？

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music_mouse 2011-02-11

后台是按name属性接收值的。。所以name改成message就Ok了。

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rubyt 2011-02-11

那你的意思是说，name="message" property="message"?

name 和 property 都是message？

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不善^ 2011-02-11

<jsp:getProperty name="hello" property="message" /> 

name 应该对应的是类里的属性吧
也就是 message

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rubyt 2011-02-11

那应该怎么改呢？

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kerioz 2011-02-11

你setProperty的时候对象弄错了吧设置的不是message这个属性而是hello这个对象

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rubyt 2011-02-11

我一共建了2个文件：

Hello.java：

package com.inspiresky.bean;

public class Hello {
private String message = "12345";
public String getMessage(){
return message;

}
public void setMessgae(String message){
this.message =message;
}
}

mytest.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<jsp:useBean id="hello" class="com.inspiresky.bean.Hello" scope="page" />
<jsp:setProperty name="hello" property="message" value="12345"/><html>
<head>

<title>My JSP 'mytest.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<body>
<jsp:getProperty name="hello" property="message" /> 
This is my JSP page. 
</body>
</html>

我标红的地方不是message属性还有 setProperty 吗？

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