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

[VarunS Singh]

""Whitelabel Error Page

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

Sat Sep 30 11:56:24 IST 2017
There was an unexpected error (type=Not Found, status=404).
No message available""

Above is the error I am getting despite i have solved this earlier for differrent project but I m unable to do it for this one. I am pasting the necessary code that might be faulty below. Please any suggestion will be appreciated. Thanks in advance.


BookController.java in controller package

package com.adminportal.controller;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import com.adminportal.domain.Book;
import com.adminportal.service.BookService;

@Controller
@RequestMapping("/book")
public class BookController {

	@Autowired
	private BookService bookService;

	@RequestMapping(value = "/add", method = RequestMethod.GET)
	public String addBook(Model model) {
		Book book = new Book();
		model.addAttribute("book", book);
		return "addBook";
	}

	@RequestMapping(value = "/add", method = RequestMethod.POST)
	public String addBookPost(@ModelAttribute("book") Book book, HttpServletRequest request) {
		bookService.save(book);

		MultipartFile bookImage = book.getBookImage();

		try {
			byte[] bytes = bookImage.getBytes();
			String name = book.getId() + ".png";
			BufferedOutputStream stream = new BufferedOutputStream(
					new FileOutputStream(new File("src/main/resources/static/image/book/" + name)));
			stream.write(bytes);
			stream.close();
		} catch (Exception e) {
			e.printStackTrace();
		}

		return "redirect: /bookList";
	}
	
	

}

AdminportalApplication.java in com package

package com.adminportal;

import java.util.HashSet;
import java.util.Set;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

import com.adminportal.domain.User;
import com.adminportal.domain.security.Role;
import com.adminportal.domain.security.UserRole;
import com.adminportal.service.UserService;
import com.adminportal.utility.SecurityUtility;


@Configuration
@EnableAutoConfiguration
@SpringBootApplication
@ComponentScan({ "com.adminportal", "controller" })
public class AdminportalApplication implements CommandLineRunner{

	@Autowired
	private UserService userService;
	
	public static void main(String[] args) {
		SpringApplication.run(AdminportalApplication.class, args);
	}

	

	@Override
	public void run(String... args) throws Exception {
		User user1 = new User();
		user1.setUsername("admin");
		user1.setPassword(SecurityUtility.passwordEncoder().encode("admin123"));
		user1.setEmail("[e-mail]");
		
		Set<UserRole> userRoles = new HashSet<>();
		Role role1 = new Role();
		role1.setRoleId(0);
		role1.setName("ROLE_ADMIN");
		userRoles.add(new UserRole(user1, role1));
		
		userService.createUser(user1, userRoles);
		
		
	}
}

BookService whch is an interface in service package

package com.adminportal.service;

import com.adminportal.domain.Book;

public interface BookService {
	
	Book save(Book book);

}

BookServiceimpl is an implementation class of above interface in service.impl package

package com.adminportal.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.adminportal.domain.Book;
import com.adminportal.repository.BookRepository;
import com.adminportal.service.BookService;

@Service
public class BookServiceImpl implements BookService{

	@Autowired 
	private BookRepository bookRepository;
	
	@Override
	public Book save(Book book) {
		
		return bookRepository.save(book);
	}
	
	

}

The controller package has two controller classes 1. Controller.java and 2. HOmeController. I m thinking that it is looking for the mapping in wrong controller or something. please help...

[VarunS Singh]

Actually the problem is getting solved by making different packges for each controller. why is that so?

[srinivas potluri]

Try by Replacing this in your AdminportalApplication.java class

@ComponentScan({ "com.adminportal.controller", "com.adminportal.service" })

this worked for me