如何在 JSP scriptlet 中使用 Java 类?错误表示该类无法解析为类型 [英] How to use a Java class in JSP scriptlet? Error says the class cannot be resolved to a type
问题描述
我已经在 Eclipse 中编写了一个示例 JSP 文件和一个 Java 文件，并试图在我的 JSP 中调用 Java 类，但它不起作用.JAVA文件的代码如下:
I have written a sample JSP file in Eclipse and a Java file and was trying to call the Java class inside my JSP but it is not working. The code of the JAVA file is as follows:
TestJava.jva
public class TestJava {
public void test(String msg)
{
System.out.println("My name is "+msg);
}
}
Java 文件位于 src 文件夹中.我的JSP文件test.jsp如下:
The Javafile is located at src folder. My JSP file test.jsp is as follows:
test.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>My First JSP with JAVA</title>
</head>
<body>
<jsp:useBean id="link" scope="application" class = "TestJava" />
<% TestJava t=new TestJava();
t.test("Joy");
%>
</body>
</html>
它给出的错误是TestJava 无法解析为类型".我研究了 Stack Overflow 中的其他相关帖子，但这些方法也不起作用.作为 JSP 新手，我无法理解如何修复该错误.所以我在问是否有人可以帮我解决这个问题.
It is giving error as "TestJava cannot be resolved to a type". I have studied other related posts in Stack Overflow but those approaches also did not work. Being new to JSP I cannot understand how to fix that error. So I am asking if anyone can help me to fix that problem.
谢谢.
推荐答案
为了在java中使用类对象，需要先导入类.与jsp中的scriplet几乎相同，这里通过<%@ page %> scriplet标签导入.
In order to use class objects in java, you need to import classes first.
Pretty much the same with scriplets in jsp, here you import it via <%@ page %> scriplet tags.
<%@ page import="your.class*" %>
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