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>
Person.java 

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;
    }
}


运行Tomcat出错： 

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;
    }
}





posted @ 2017-03-06 15:26  N3verL4nd  阅读(404)  评论(0)    收藏  举报