Spring Boot validation not working
Asked on October 06, 2023
I have a class with Jakarta @NotNull and @Size validation.
1)
public class Employee implements Serializable {
@NotNull
@Size(min = 5, max = 15)
private String empId;
@NotNull
@Size(min = 5, max = 20)
private String name;
}
2) In controller class:
@PostMapping("post-emp")
public ModelAndView createUser(@Valid Employee emp, BindingResult result) {
------
}
3) In Thymeleaf :
<form action="#" th:action="@{/post-emp}" th:object="${emp}" method="POST">
<label th:if="${#fields.hasErrors('empId')}" th:text="#{error.emp.id}" th:class="'error'">Id Error</label>
------
</form>
Validation is not working.
Replied on October 06, 2023
Check following points.
1. Need spring-boot-starter-validation dependency.
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
2. Use @ModelAttribute with @Valid :
@PostMapping("post-emp")
public ModelAndView createUser(@Valid @ModelAttribute("emp") Employee user, BindingResult result) {
}
}
Replied on October 06, 2023
Thanks. Working.
