jb5中jsp页面调用java bean运行出错,请教解决办法!!!
在本机D:\javatest\test_bean目录下建立一test_bean.jpx项目,目录组织如下:
D:\javatest\test_bean\bak,
D:\javatest\test_bean\classes,
D:\javatest\test_bean\conf,
D:\javatest\test_bean\defaultroot,
D:\javatest\test_bean\src,
D:\javatest\test_bean\web-inf,
D:\javatest\test_bean\work,
D:\javatest\test_bean\SayHelloBean.html,
D:\javatest\test_bean\SayHelloBean.jsp,
D:\javatest\test_bean\src\HelloBean.java
1.SayHelloBean.html:
......
<form method = "get" action="SayHelloBean.jsp">
<p>
姓名:
<input type="text" name = "name">
性别:
<select name = "sex">
<option value="先生">先生</option>
<option value="小姐">小姐</option>
</select>
</p>
<p>
<input type = "submit" name = "submit" value = "提交">
</p>
</form>
......
2.SayHelloBean.jsp:
<%@ page language = "java" import = "HelloBean;" contentType="text/html"%>
<jsp:useBean id="Hello" class="HelloBean" scope="request">
<jsp:setProperty name="Hello" property="*" />
</jsp:useBean>
<html>
<head>
<title>HelloBean</title>
</head>
<body bgcolor="#FFFFFF">
<p> </p>
<p align="center">
<font size="4">Hello
<font color="#0000FF">
<b><%=Hello.getName()%></b>
</font>
<%=Hello.getSex()%>你好!
</font>
</p>
</body>
</html>
3.HelloBean.java :
public class HelloBean {
private String name = "";
private String sex = "";
public HelloBean(){
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getSex() {
return this.sex;
}
}
4.在jb5中rebuild HelloBean.java 后生成 HelloBean.class自动存放在D:\javatest\test_bean\classes 和 D:\javatest\test_bean\WEB-INF\classes中.
jsp页面编译通过。
5.运行到jsp页面时出错:
org.apache.jasper.JasperException: Unable to compile class for JSPD:\javatest\test_bean\work\localhost_8080%2Ftest_bean\_0002fSayHelloBean_0002ejspSayHelloBean_jsp_0.java:13: import ????? HelloBean?
import HelloBean;;
......
回复人: VCVCVC(VC爱好者) (2002-1-23 17:55:37)
在你的HelloBean.java中加上
package abc
修改你的JSP文件把里面的 <%@ page language = "java" import = "HelloBean;" contentType="text/html"%>改为
<%@ page language = "java" import = "abc.HelloBean;" contentType="text/html"%>
回复人: pengchy(龙在天) (2002-1-23 17:58:30)
JAVA包引用的不对
回复人: lly9900(lly990) (2002-1-23 18:09:31)
如果这样的话,还得先建个abc的子目录,否则不能编译。 可不可以不加package呢?
我再试试,先多谢两位!!!!
回复人: lly9900(lly990) (2002-1-23 18:17:38)
在src里建了pack_bean目录,把java 代码移过来后编译成功.
在写jsp页面时, import=pack_bean.后能识别HelloBean,改了以后编译ok,运行时jsp页面还是出错!!!