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Invalid property 'username' of bean class [java.lang.String]

Vinod Vijay

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posted 6 years ago

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Hi, I'm getting following error while running my Spring MVC web application:-

org.springframework.beans.NotReadablePropertyException: Invalid property 'username' of bean class [java.lang.String]: Bean property 'username' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

Why error is pointing to a String class like java.lang.String? It should take from my UserForm object.

UserForm:-

Controller Class (LoginPageController):-

/**
 * 
 */
package myspring;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * @author vinod827
 *
 */
@Controller
@RequestMapping(value = "/login")
public class LoginPageController {

private final Logger logger = LoggerFactory.getLogger(LoginPageController.class);

@RequestMapping(method = RequestMethod.GET)
    public String showLoginPage(ModelMap modelMap){
        logger.info("**************");
        UserForm userForm = new UserForm();
        modelMap.addAttribute("userForm", "userForm");
        return "login";
    }

@RequestMapping(method = RequestMethod.POST)
    public String verifyLogin(UserForm userForm, BindingResult bindingResult, ModelMap modelMap){
        logger.info("********&&&&&&&&&******");
        String username = "username";
        String password = "password";       
        logger.info(username+":"+password);
        userForm = (UserForm) modelMap.get(userForm);       
        modelMap.addAttribute("userForm", userForm);
        return "success";
    }
}

JSP:-

Can you please advise on this where I'm making the mistake? I tried refactor the class name of UserForm to just 'User.java' and also rename username to user accordingly on JSP as well but still showing same error.
Thank you,

Vinod Vijay Nair

Tushar Goel

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posted 6 years ago

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I am not sure bt i think you are mssing @ModelAttribute in the controller method.. so your method should be like this:

Vinod Vijay

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posted 6 years ago

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Tushar Goel wrote:I am not sure bt i think you are mssing @ModelAttribute in the controller method.. so your method should be like this:

@RequestMapping(method = RequestMethod.POST) public String verifyLogin(@ModelAttribute("userForm") UserForm userForm, BindingResult bindingResult, ModelMap modelMap){ logger.info("********&&&&&&&&&******"); String username = "username"; String password = "password"; logger.info(username+":"+password); userForm = (UserForm) modelMap.get(userForm); modelMap.addAttribute("userForm", userForm); return "success"; }

Hi, I appreciate your help however my problem is my login screen itself is not populating means look like following method has some problem:-
@RequestMapping(method = RequestMethod.GET)
public String showLoginPage(@ModelAttribute("userForm") UserForm userForm, BindingResult bindingResult, ModelMap modelMap){
logger.info("**************");
userForm = (UserForm) modelMap.get(userForm);
modelMap.addAttribute("userForm", "userForm");
return "login";
}

I added @ModelAttribute also but somehow I feel like my form bean i.e. UserForm is not being recognized with this login JSP as a result im still getting following error during loading it:-
org.springframework.beans.NotReadablePropertyException: Invalid property 'username' of bean class [java.lang.String]: Bean property 'username' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

Vinod Vijay Nair

Vinod Vijay

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Posts: 165

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posted 6 years ago

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Tushar Goel wrote:I am not sure bt i think you are mssing @ModelAttribute in the controller method.. so your method should be like this:

@RequestMapping(method = RequestMethod.POST) public String verifyLogin(@ModelAttribute("userForm") UserForm userForm, BindingResult bindingResult, ModelMap modelMap){ logger.info("********&&&&&&&&&******"); String username = "username"; String password = "password"; logger.info(username+":"+password); userForm = (UserForm) modelMap.get(userForm); modelMap.addAttribute("userForm", userForm); return "success"; }

Hi, I appreciate your help however my problem is my login screen itself is not populating means looks like following method has some problem:-
@RequestMapping(method = RequestMethod.GET)
public String showLoginPage(@ModelAttribute("userForm") UserForm userForm, BindingResult bindingResult, ModelMap modelMap){
logger.info("**************");
userForm = (UserForm) modelMap.get(userForm);
modelMap.addAttribute("userForm", "userForm");
return "login";
}

I added @ModelAttribute also but somehow I feel like my form bean i.e. UserForm is not being recognized with this login JSP as a result im still getting following error during loading it:-
org.springframework.beans.NotReadablePropertyException: Invalid property 'username' of bean class [java.lang.String]: Bean property 'username' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

Vinod Vijay Nair

Tushar Goel

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posted 6 years ago

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it may possible your dispatcher_servlet.xml have error? What is your login.html and dispatcher xml?

Vinod Vijay

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Tushar Goel wrote:it may possible your dispatcher_servlet.xml have error? What is your login.html and dispatcher xml?

Hi, following are my configuration files:-
Web.xml:-

TaskManagement-servlet.xml:-

There is an index.jsp but im not using this default page. I'm trying to access my login JSP by appending /login in URL which is hitting the login controller class (LoginPageController.java) :-
http://localhost:8081/TaskManagamentApp/login

Vinod Vijay Nair

Tushar Goel

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posted 6 years ago

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got it. You have issue while adding object to the model.

you have used

but it should be:

Vinod Vijay

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posted 6 years ago

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Tushar Goel wrote:got it. You have issue while adding object to the model.

you have used

modelMap.addAttribute("userForm", "userForm");

but it should be:

modelMap.addAttribute("userForm", userForm);

Thanks, really appreciated for your help. I overlooked this error. It worked now.

Vinod Vijay Nair

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