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java - 编译Simple自定义标签类时出现错误

转载 作者:行者123 更新时间:2023-12-02 01:49:13 24 4
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我创建了简单的自定义标签库。但是当我运行 jsp 时,我收到以下代码错误。谁能解释一下这个错误。

Compiling 1 source file to C:\Users\Senani\Documents\NetBeansProjects\JSTL\build\generated\classes
C:\Users\Senani\Documents\NetBeansProjects\JSTL\build\generated\src\org\apache\jsp\index_jsp.java:85: error: cannot find symbol
Test _jspx_th_t_test_0 = (_jspx_resourceInjector != null) ? _jspx_resourceInjector.createTagHandlerInstance(Test.class) : new Test();
^
symbol: class Test
location: class index_jsp
C:\Users\Senani\Documents\NetBeansProjects\JSTL\build\generated\src\org\apache\jsp\index_jsp.java:85: error: cannot find symbol
Test _jspx_th_t_test_0 = (_jspx_resourceInjector != null) ? _jspx_resourceInjector.createTagHandlerInstance(Test.class) : new Test();
^
symbol: class Test
location: class index_jsp
C:\Users\Senani\Documents\NetBeansProjects\JSTL\build\generated\src\org\apache\jsp\index_jsp.java:85: error: cannot find symbol
Test _jspx_th_t_test_0 = (_jspx_resourceInjector != null) ? _jspx_resourceInjector.createTagHandlerInstance(Test.class) : new Test();
^
symbol: class Test
location: class index_jsp
3 errors
C:\Users\Senani\Documents\NetBeansProjects\JSTL\nbproject\build-impl.xml:953: The following error occurred while executing this line:
C:\Users\Senani\Documents\NetBeansProjects\JSTL\nbproject\build-impl.xml:296: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 2 seconds)

XML 代码

<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.1" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd">
<tlib-version>1.0</tlib-version>
<short-name>lb1</short-name>
<uri>/WEB-INF/tlds/lb1</uri>
<tag>
<name>test</name>
<body-content>empty</body-content>
<tag-class>Test</tag-class>
</tag>
</taglib>

JSP代码

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="t" uri="/WEB-INF/tlds/lb1.tld"%>

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<t:test/>
</body>
</html>

我的Java类

 public class Test extends SimpleTagSupport{

@Override
public void doTag() throws JspException, IOException {
System.out.println("tag work");
}

}
<小时/>

更新了问题


我将 java 类移动到文件夹中。但编译的时候还是报错。

org.apache.jasper.JasperException:
file:C:/Users/Senani/Documents/NetBeansProjects/JSTL/build/web/index.jsp(17,8)
PWC6032: Unable to load tag handler class "Test" for tag "t:test"
org.apache.jasper.JasperException: PWC6032: Unable to load tag
handler class "Test" for tag "t:test"
C:/Users/Senani/Documents/NetBeansProjects/JSTL/build/web/index.jsp(17,8)
C:\Users\Senani\Documents\NetBeansProjects\JSTL\nbproject\build-impl.xml:936:
Java returned: 1 BUILD FAILED (total time: 1 second)

最佳答案

您收到该错误是因为您将类放入默认包中。

永远不要这样做。使用正确的包,并确保在 XML 文件中指定类的完全限定名称。

关于java - 编译Simple自定义标签类时出现错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53239799/

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