${employee.id} from List in JSP throws java.lang.NumberFormatException: For input string: “id”

by

Your getAllEmployees(searchName) method doesn’t return a List<Employee>, but a List<Object[]>. Most likely there’s also an “unchecked cast” warning generated by the compiler which you ignored or suppressed.

The evidence is the involvement of javax.el.ArrayELResolver in the stack trace. This is only involved when the base of an EL expression is of an array type. If you really had an Employee instead of an Object[], then you’d expect javax.el.BeanELResolver at the particular stack trace line where the EL expression ${employee.id} is to be evaluated. As ${employee} is in your case actually an array, EL will interpret the id property as an array index and then tries to parse it as an Integer, but failed to do so as you can see in top lines of the stack trace.

To solve this problem, you’ve 2 options:

  1. Fix the getAllEmployees(searchName) method to return a real List<Employee>. Usually, this is to be done by querying the Employee entity directly instead of invididual columns/fields.

  2. Replace all incorrect List<Employee> declarations by List<Object[]> and handle it in EL as an object array like so ${employee[0]}, ${employee[1]}, etc.

More Related Contents:

  1. Using JSF as view technology of Spring MVC
  2. How to solve the “failed to lazily initialize a collection of role” Hibernate exception
  3. Spring Hibernate – Could not obtain transaction-synchronized Session for current thread
  4. How do I prevent people from doing XSS in Spring MVC?
  5. List as form backing object using Spring 3 MVC, correct syntax?
  6. @Autowired in static classes
  7. JPA / JTA / @Transactional Spring annotation
  8. The request sent by the client was syntactically incorrect.-Spring MVC + JDBC Template
  9. Using both Thymeleaf and JSP
  10. Spring MVC @PathVariable with dot (.) is getting truncated
  11. What is the difference between ApplicationContext and WebApplicationContext in Spring MVC?
  12. How does spring.jpa.hibernate.ddl-auto property exactly work in Spring?
  13. Content type ‘application/x-www-form-urlencoded;charset=UTF-8’ not supported for @RequestBody MultiValueMap
  14. @Service are constructed twice
  15. java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
  16. How do I get the Session Object in Spring?
  17. Spring Security exclude url patterns in security annotation configurartion
  18. Spring Security 3.2 CSRF support for multipart requests
  19. Spring catch all route for index.html
  20. How to include js and CSS in JSP with spring MVC
  21. How to get access to HTTP header information in Spring MVC REST controller?
  22. How to show all controllers and mappings in a view
  23. How to use LocalDateTime RequestParam in Spring? I get “Failed to convert String to LocalDateTime”
  24. Spring 4 + Hibernate 5 = org.springframework.orm.jpa.EntityManagerHolder cannot be cast to org.springframework.orm.hibernate5.SessionHolder
  25. Spring REST using Jackson – 400 bad request logging
  26. Customized ObjectMapper not used in test
  27. Spring HandlerMethodArgumentResolver not executing
  28. Implementing Optimistic lock using Hibernate and Spring
  29. Why is an excerpt projection not applied automatically for a Spring Data REST item resource?
  30. Configure spring boot to redirect 404 to a single page app [duplicate]

Leave a Comment