XXX cannot be resolved to a type！报错已解决！jsp_contenttype cannot be resolved

作者：人工智能uu | 2024-06-19 01:59:14

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contenttype cannot be resolved

在eclipse中写了一个自动刷新时间的程序，

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<% response.setHeader("refresh","1"); %>
<%
Date today = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
out.print("当前时间是: "+sdf.format(today));
%>
</body>
</html>

上面运行后报错：Date cannot be resolved to a type！

SimpleDateFormat cannot be resolved to a type！

报错截图：

以下为解决方法:<%@ Date import="java.util.*" %>，导入上述Date即可。

改后的代码如下：

<%@ page language="java"
import="java.util.*,java.text.SimpleDateFormat"
contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<% response.setHeader("refresh","1"); %>
<%
Date today = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
out.print("当前时间是: "+sdf.format(today));
%>
</body

>
</html>

运行结果如图：

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