喜悦国际村 - JAVA/C/C++

页: [1]

aries_jo

2004-11-6 08:13 AM

求救

是什么错误呀

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 3 in the jsp file: /test/numguess.jsp

Generated servlet error:
[javac] Compiling 1 source file

C:\Tomcat 4.1\work\Standalone\localhost\_\test\numguess_jsp.java:46: package num does not exist
   num.NumberGuessBean numguess = null;
      ^

An error occurred at line: 3 in the jsp file: /test/numguess.jsp

Generated servlet error:
C:\Tomcat 4.1\work\Standalone\localhost\_\test\numguess_jsp.java:48: package num does not exist
      numguess = (num.NumberGuessBean) pageContext.getAttribute("numguess", PageContext.SESSION_SCOPE);
                     ^

An error occurred at line: 3 in the jsp file: /test/numguess.jsp

Generated servlet error:
C:\Tomcat 4.1\work\Standalone\localhost\_\test\numguess_jsp.java:51: package num does not exist
         numguess = (num.NumberGuessBean) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "num.NumberGuessBean");

雨伞	2004-11-6 08:21 AM

C:\Tomcat 4.1\work\Standalone\localhost\_\test\numguess_jsp.java:46: package num does not exist
num.NumberGuessBean numguess = null;

包的问题，看需要的包有没有引进来，

aries_jo

2004-11-6 08:38 AM

怎么样测试才知道包是否过来

这里是放文件
C:\Tomcat 4.1\webapps\ROOT\test

这里是放JAVABEAN的
C:\Tomcat 4.1\webapps\ROOT\test\WEB-INF\classes\num

雨伞	2004-11-6 09:35 AM

把你引入包的代码贴出来，

aries_jo

2004-11-6 09:51 AM

我的文件放的位置有问题嘛？

package num;
import java.util.*;

public class NumberGuessBean
{
int answer;
boolean success;
String hint;
int numGuesses;

public NumberGuessBean()
{
      reset();
}

public void setGuess(String guess){
   numGuesses++;
   int g;
   try{
         g = Integer.parseInt(guess);
   }

   catch(NumberFormatException e){
         g = -1;
   }

   if(g==answer){
         success = true;
   }
   else if(g == -1){
         hint="请输入一个整数！";
   }
   else if(g < answer){
         hint="试试大一点的数！";
   }
   else if(g > answer){
         hint="试试小一点的数！";
   }

}

public boolean getSuccess(){
      return success;
}

public String getHint(){
      return ""+hint;
}

public int getNumGuesses(){
      return numGuesses;
}

public void reset(){
      answer = Math.abs(new Random().nextInt() % 100)+1;
      success = false;
numGuesses=0;
}
};

雨伞	2004-11-6 10:05 AM

我是说numguess.jsp这个文件引入包的代码，不是BEAN代码

aries_jo

2004-11-6 10:19 AM

不好意思·～

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="num.NumberGuessBean"%>
<jsp:useBean id="numguess" class="num.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>

<html>
<head><title>Number Guess</title></head>
<body bgcolor="white">
<font size="4">
<% if(numguess.getSuccess()){%>
恭喜你！你猜中了！
你所用的次数：<%numguess.getNumGuesses();%> 次
<%numguess.reset();%>
<a href="numguess.jsp">再来一次吗？</a>
<% }else if (numguess.getNumGuesses()==0){%>
欢迎玩猜数字的游戏！<p>
情输入一个1到100之间的整数！<p>

<form method=get>
你猜呀：<input type="text" name=guess>
<input type=submit value="提交">
</form>

<% }else{ %>
嗯，<b><%=numguess.getNumGuesses()%>次咯！<p>
<form method=get>
你猜呀：<input type="text" name=guess>
<input type=submit value="提交">
</form>
<% } %>
</font>
</body>
</html>

whymecant

2004-11-6 10:35 AM

在num里再建个目录test试试看！

whymecant

2004-11-6 10:35 AM

然后class字节码文件放在test下运行试试

雨伞	2004-11-6 11:17 AM

[url]http://www.phpx.com/happy/thr84791.html[/url]

aries_jo

2004-11-9 02:03 AM

包是方在这个目录下
C:\Tomcat 4.1\webapps\ROOT\test\WEB-INF\classes\num
还是在
C:\Tomcat 4.1\webapps\ROOT\WEB-INF\classes\num

目录下呢？

首先我要弄明白这个问题呀

雨伞	2004-11-9 03:27 AM

包是方在这个目录下
C:\Tomcat 4.1\webapps\ROOT\test\WEB-INF\classes\num
还是在
C:\Tomcat 4.1\webapps\ROOT\WEB-INF\classes\num

目录下呢？

你要在server.xml里指定你的WEB目录，如果你是指定C:\Tomcat 4.1\webapps\ROOT\test\这个目录的话那你CLASS就应该在C:\Tomcat 4.1\webapps\ROOT\test\WEB-INF\classes\num目录，如果是ROOT，也一样。

aries_jo

2004-11-9 03:53 AM

就是说：WEB-INF\classes这两个文件夹必须要在根目录下咯

雨伞	2004-11-9 04:27 AM

是，必须在WEB工程的根目录下，看你的xml文件怎么配置的了

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