我已经用 jsp 编写了一个 hello world 程序，现在我尝试通过 JSP 处理表单。
我的 jsp 表单(GetName.jsp)如下所示
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<FORM METHOD=POST ACTION="SaveName.jsp">
Name <INPUT TYPE=TEXT NAME=username SIZE=20><BR>
Email <INPUT TYPE=TEXT NAME=email SIZE=20><BR>
Age <INPUT TYPE=TEXT NAME=age SIZE=4>
<P><INPUT TYPE=SUBMIT>
</FORM>
</BODY>
</HTML>
</body>
</html>
类似地，SaveName.jsp 看起来像这样
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<jsp:useBean id="userData" class="javabeans.UserData" scope="session"/>
<jsp:setProperty name="userData" property="*"/>
</BODY>
</HTML>
</body>
</html>
在同一个项目中名为 javabeans 的包中，名为 UserData 的类如下所示。
package javabeans;
public class UserData {
String username;
String email;
int age;
public void setUsername( String value )
{
username = value;
}
public void setEmail( String value )
{
email = value;
}
public void setAge( int value )
{
age = value;
}
public String getUsername() { return username; }
public String getEmail() { return email; }
public int getAge() { return age; }
}
现在，当运行 GetName.jsp 时，我收到以下错误
D:\javaworkspace\Netbeans7-2\HelloWeb\build\generated\src\org\apache\jsp\SaveName_jsp.java:56: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
UserData user = null;
^
D:\javaworkspace\Netbeans7-2\HelloWeb\build\generated\src\org\apache\jsp\SaveName_jsp.java:58: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = (UserData) _jspx_page_context.getAttribute("user", PageContext.SESSION_SCOPE);
D:\javaworkspace\Netbeans7-2\HelloWeb\build\generated\src\org\apache\jsp\SaveName_jsp.java:60: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = new UserData();
3 errors
D:\javaworkspace\Netbeans7-2\HelloWeb\nbproject\build-impl.xml:930: The following error occurred while executing this line:
D:\javaworkspace\Netbeans7-2\HelloWeb\nbproject\build-impl.xml:284: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 2 seconds)
最佳答案
您需要在 SaveName.jsp 中导入 UserData 类
将此添加到 SaveName.jsp 中 jsp 代码的顶部
<%@ page import="javabeans.UserData" %>
关于java - 将 jsp 页面链接到 java 类，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13474455/