Question

我有一个简单的html页面，我传递了两个值，一个名称（String）＆amp; jsp页面的夜晚数（int）。在那里，我使用jsp:useBean标签＆amp;一个jsp:setProperty标记。当我用<%= myRes.getName() %>替换<jsp:getProperty name="myRes" property="name">时，它会提供一个很长的异常报告。但是当我重新加载页面两次时，它会提供正确的输出。例外情况报告如下。

org.apache.jasper.JasperException: /hotel_jsp_bean_one.jsp(13,30) According to TLD, tag jsp:getProperty must be empty, but is not
    org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
    org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
    org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:132)
    org.apache.jasper.compiler.Parser.parseBody(Parser.java:1631)
    org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1002)
    org.apache.jasper.compiler.Parser.parseGetProperty(Parser.java:905)
    org.apache.jasper.compiler.Parser.parseStandardAction(Parser.java:1132)
    org.apache.jasper.compiler.Parser.parseElements(Parser.java:1449)
    org.apache.jasper.compiler.Parser.parse(Parser.java:138)
    org.apache.jasper.compiler.ParserController.doParse(ParserController.java:239)
    org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
    org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:197)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:352)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:339)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:594)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:344)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

我的bean类是：

package hotel;

public class Hotel
{
    private String name;
    private int nights;

    public Hotel()
    {
        this.name = "<NOT SPECIFIED>";
        this.nights = -1;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getName()
    {
        return this.name;
    }

    public void setNights(int nights)
    {
        this.nights = nights;
    }

    public int getNights()
    {
        return this.nights;
    }

然后我的第一个html页面是：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hotel Califona Reservation</title>
</head>

<body>
    <h2 align="center">Welcom To The Hotel Califonia</h2>
    <br/>
    <br/>
    <form method="post" action="hotel_jsp_bean_one.jsp">
        <label>Enter your name : <input type="text" name="name"/>
        <br/>
        <label>How many nights : </label><select name="nights">
                                            <option value="1">1</option>
                                            <option value="2">2</option>
                                            <option value="3">3</option>
                                            <option value="4">4</option>
                                          </select>
        <br/>
        <input type="submit" name="submit" value="Reserve"/>
    </form> 
</body>
</html>

然后我的最后一个jsp页面是：

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hotel Califonia Reservation</title>
</head>

<jsp:useBean id="myRes" class="hotel.Hotel" scope="page"/>
<body>
    <jsp:setProperty name="myRes" property="*"/>

    <h3 style="color:#0000FF"><jsp:getProperty name="myRes" property="name"> is staying for <jsp:getProperty name="myRes" property="nights"> nights</h3>
</body>
</html>

请原谅我所忽略的任何不便的错误。任何帮助将不胜感激。提前谢谢。

Answer 1

这是无效的：

<jsp:getProperty name="myRes" property="name"> is staying for <jsp:getProperty name="myRes" property="nights">

应该是：

<jsp:getProperty name="myRes" property="name"/> is staying for <jsp:getProperty name="myRes" property="nights"/>

请注意每个getProperty末尾的结束/。

Answer 2

我今天在JSP / Servlets类中遇到了这个问题。我相信这个解决方案是在最终的JSP页面中放置/关闭标记。

我忽略了关闭标签，在放入/后，我的页面完美无缺。

jsp：getProperty给出“根据TLD，标签jsp：getProperty必须为空，但不是”异常

2 个答案: