Org.springframework.beans.notreadablepropertyexception: invalid property

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Spring

Hello everyone, I have

org.springframework.beans.NotReadablePropertyException: Invalid property 'expensename' of bean class [java.lang.String]: 

while working on a Spring boot app. The error occurred after I created a spring form and used the path attribute to access the the entity field name "expensename" but I got the White Label Error Page below when I tried to run my expense.jsp.

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sat Mar 26 03:49:39 WAT 2022
There was an unexpected error (type=Internal Server Error, status=500).
Invalid property 'expensename' of bean class [java.lang.String]: Bean property 'expensename' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
org.springframework.beans.NotReadablePropertyException: Invalid property 'expensename' of bean class [java.lang.String]: Bean property 'expensename' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
	at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:627)
	at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:617)
	at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:158)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:178)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:199)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:164)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:149)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:139)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:122)
	at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:460)
	at org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:357)
	at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:87)
	at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:83)
	at org.apache.jsp.WEB_002dINF.views.expense_jsp._jspx_meth_form_005finput_005f0(expense_jsp.java:282)
	at org.apache.jsp.WEB_002dINF.views.expense_jsp._jspx_meth_form_005fform_005f0(expense_jsp.java:232)
	at org.apache.jsp.WEB_002dINF.views.expense_jsp._jspService(expense_jsp.java:157)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

What I have tried:

The problem came from here.

<h1>Add Expense</h1>

<form:form action="${contextRoot}/save" method="post" modelAttribute="expense">

    <form:input path="expensename" placerholder="Enter Expense Name"/>
    <form:textarea path="note" placerholder="Enter note (optional)"/>

    <button type="submit">Add Expense</button>

</form:form>

My Controller

@Controller
public class MasterController {
	
	@Autowired
	ExpenseService expenseService;
	
	@RequestMapping("/")
	public ModelAndView home() {
		ModelAndView mav = new ModelAndView("home");
		mav.addObject("message", "List of expenses");
		List<Expense> expenses = expenseService.findAll();
		mav.addObject("expenses", expenses);
		return mav;
		
	}
	
	@RequestMapping("/expense") 
	public ModelAndView addexpense() {
		ModelAndView mav = new ModelAndView("expense");
		mav.addObject("expense", "new Expense()");
		return mav;
		
	}
	
	@RequestMapping(value= "/expense", method=RequestMethod.POST)
	public String save(@ModelAttribute("expense") Expense expense) {
		expenseService.save(expense);
		return "redirect:/";
		
	}

}

My Expense.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<c:set var="contextRoot" value="${pageContext.request.contextPath}" />

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>   
</head>
<body>

	<h1>Add Expense</h1> 
	
	<form:form action="${contextRoot}/save" method="post" modelAttribute="expense">
	
		<form:input path="expensename" placerholder="Enter Expense Name"/>
		<form:textarea path="note" placerholder="Enter note (optional)"/>
		
		<button type="submit">Add Expense</button>
	
	</form:form>

</body>
</html>

My Entity - Expense.java

@Entity
@Table(name="tbl_expenses")
@ToString
public class Expense {
	

	@Id
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	private Long id;
		
	@Column(name="description")
	private String expensename;
		
	private BigDecimal amount;
	
	private String note;
	
	private Long createdAt;
	
	
	public Long getId() {
		return id;
	}


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


	public String getExpensename() {
		return expensename;
	}
	
	public void setExpensename(String expensename) {
		this.expensename = expensename;
	}

	
	public BigDecimal getAmount() {
		return amount;
	}


	public void setAmount(BigDecimal amount) {
		this.amount = amount;
	}


	public String getNote() {
		return note;
	}


	public void setNote(String note) {
		this.note = note;
	}


	public Long getCreatedAt() {
		return createdAt;
	}


	public void setCreatedAt(Long createdAt) {
		this.createdAt = createdAt;
	}


	@Override
	public String toString() {
		return "Expense [id=" + id + ", expensename=" + expensename + ", amount=" + amount + ", note=" + note
				+ ", createdAt=" + createdAt + "]";
	}
	
}

I used Eclipse to create my Getters and Setters. Please how can I overcome this hurdle ? Thanks for any help. Also, please note that the code that I'm using came from this Youtube tutorial on Spring boot - Spring Boot Masterclass 12 - Create expense form - YouTube[^]