HTTP Status 500 - javax.el.PropertyNotFoundException

Question

Я пытаюсь сделать простой CRUD. Я получил эту ошибку - javax.el.PropertyNotFoundException: Свойство isAdmin не найдено по типу com.kaasbetrayer.entity.User. и не знаю, как я могу это исправить.

package com.kaasbetrayer.entity; 

import java.io.Serializable; 
import java.sql.Timestamp; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 

import org.hibernate.annotations.Type; 
import org.hibernate.type.descriptor.sql.TinyIntTypeDescriptor; 
@Entity 
@Table(name = "user") 
public class User implements Serializable{ 

    private static final long serialVersionUID = -6254657371433674903L; 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private long id; 

    @Column 
    private String name; 

    @Column 
    private int age; 

    @Column 
    @Type(type = "org.hibernate.type.NumericBooleanType") 
    private boolean isAdmin; 

    @Column 
    private Timestamp createdDate; 

    public User(){ 
    } 

    public long getId() { 
     return id; 
    } 

    public void setId(long id) { 
     this.id = id; 
    } 

    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; 
    } 

    public boolean isAdmin() { 
     return isAdmin; 
    } 

    public void setAdmin(boolean isAdmin) { 
     this.isAdmin = isAdmin; 
    } 

    public Timestamp getCreatedDate() { 
     return createdDate; 
    } 

    public void setCreatedDate(Timestamp createdDate) { 
     this.createdDate = createdDate; 
    } 

    @Override 
    public String toString() { 
     return "User {id=" + id + 
       ", name=" + name + 
       ", age=" + age + 
       ", isAdmin=" + isAdmin + 
       ", createdDate="+ createdDate + "}"; 
    }  
} 

Трассировка стека:

org.apache.jasper.JasperException: javax.el.PropertyNotFoundException: Property 'isAdmin' not found on type com.kaasbetrayer.entity.User 
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:555) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168) 
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) 
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228) 
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622) 
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 

первопричина

javax.el.PropertyNotFoundException: Property 'isAdmin' not found on type com.kaasbetrayer.entity.User 
    javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:268) 
    javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:221) 
    javax.el.BeanELResolver.property(BeanELResolver.java:355) 
    javax.el.BeanELResolver.getValue(BeanELResolver.java:95) 
    org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110) 
    org.apache.el.parser.AstValue.getValue(AstValue.java:169) 
    org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184) 
    org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:943) 
    org.apache.jsp.WEB_002dINF.pages.userList_jsp._jspx_meth_c_005fout_005f3(userList_jsp.java:400) 
    org.apache.jsp.WEB_002dINF.pages.userList_jsp._jspx_meth_c_005fforEach_005f0(userList_jsp.java:299) 
    org.apache.jsp.WEB_002dINF.pages.userList_jsp._jspx_meth_c_005fif_005f1(userList_jsp.java:249) 
    org.apache.jsp.WEB_002dINF.pages.userList_jsp._jspService(userList_jsp.java:155) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168) 
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) 
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228) 
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622) 
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 

SQL:

create table User (
id bigint not null auto_increment, 
name varchar(255), 
age integer, 
isAdmin boolean, 
createdDate timestamp, 
primary key (id) 
) 

Answer 1

Если вы настаиваете на именование недвижимости isAdmin, а затем получить/сеттер должны быть имя boolean isIsAdmin() и setIsAdmin(boolean isAdmin).

Answer 2

Насколько я знаю, методы получения и установки для недвижимости isAdmin должен выглядеть как getIsAdmin и setIsAdmin вместо isAdmin и setAdmin. Геттеры и сеттеры обычно должны выглядеть как get/set, за которым следует имя свойства с первой буквой в Caps.