jsp：useBean 不能编译成class或者没有class这个属性
bean.jsp
<%--
JSP学习笔记
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<jsp:useBean id="person" class="Person" />
<html>
<head>
<title>jsp测试</title>
</head>
<body>
</body>
</html>
import java.io.Serializable;
public class Person implements Serializable{
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 5 in the jsp file: /bean.jsp
Person cannot be resolved to a type
2: JSP学习笔记
3: --%>
4: <%@ page contentType="text/html;charset=UTF-8" language="java" %>
5: <jsp:useBean id="person" class="Person" />
6: <html>
7: <head>
8: <title>jsp测试</title>观察出错信息：无法编译（*.java --> *.class）
定位到D:\Tomcat\apache-tomcat-9.0.0.M15\work\Catalina\localhost\test\org\apache\jsp
确实也没有生成*.class文件。
经过查资料：JavaBean必须位于某个包内。
package com.xiya;
import java.io.Serializable;
public class Person implements Serializable{
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}