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請問下我哪錯了？？？

用戶名：<jsp:getProperty property="username" name="myUsers"/><br>

密碼：<jsp:getProperty property="password" name="myUsers"/><br>

提示錯誤信息

HTTP Status 500 -

type?Exception report

message

description?The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: file:/dologin.jsp(40,4) jsp:getProperty for bean with name 'myUsers'. Name was not previously introduced as per JSP.5.3

努力GOGO

2015-11-29

源自：JAVA遇見HTML——JSP篇 5-7

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4 回答

Rober_Lin 回答被采納 +3 積分
2015-11-29

<jsp:useBean id="實例化對象名" class="所定義的類"

用戶名：<jsp:getProperty property="username" name="實例化對象名"/><br>

0 回復有任何疑惑可以回復我~

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努力GOGO 提問者

我不知道哪錯了語法對著呢值也對著呢

2015-11-29 回復有任何疑惑可以回復我~

Rober_Lin
2015-11-30

<jsp:setProperty property="password" name="myUsers" param="mypass"/>

后面的應該是value="mypass"

我把我寫的代碼發上來吧

package?pack;

public?class?MyBean?{
private?String?name;
private?String?password;
public?String?getName(){
	return?name;
}
public?void?setName(String?name){
	this.name=name;
}
public?String?getPassword(){
	return?password;
}
public?void?setPassword(String?password){
	this.password=password;
}


}

<%@?page?language="java"?contentType="text/html;?charset=utf-8"%>
<!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="mybean"?class="pack.MyBean"?scope="page"/>
<jsp:setProperty?name="mybean"?property="name"?value="jack"/>
<jsp:setProperty?name="mybean"?property="password"?value="abc123"/>
username:
<jsp:getProperty??property="name"??name="mybean"??/><br>
password:
<jsp:getProperty??property="password"??name="mybean"/><br>

</body>
</html>

0 回復有任何疑惑可以回復我~

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