我有一个搜索栏，可以接受任何字符串。它将检查数据库，以查看记录是否在名字或姓氏中与字符串匹配。但它也应该能够将全名作为参数，并返回基于它的记录。
我将fullName作为参数，并将其拆分以创建单独的名字和姓氏，并使用if语句检查是否匹配。但它似乎不起作用，尽管我看不出逻辑上的问题。
控制器类：

@Controller
public class EmployeeController {
private final EmployeeService empService;

@Autowired
public EmployeeController(EmployeeService empService) {
    this.empService = empService;
}

@PostMapping("search-by-full-name")
public String handleSearchByFullName(Model model, @RequestParam("fullName") String fullName) {
    if (fullName.contains(" ")) {
        String[] nameParts = fullName.split(" ");
        String firstName = nameParts[0];
        String lastName = nameParts[1];
        for (Employee emp : empService.findByFullName(fullName)) {
            if (emp.getFirstName().equals(firstName) && emp.getLastName().equals(lastName)) {
                model.addAttribute("emps", empService.findByFirstName(firstName));
                return "showEmployees";
            }
        }
    } else if (!empService.findByFullName(fullName).isEmpty()) {
        model.addAttribute("emps", empService.findByFullName(fullName));
        return "showEmployees";
    }
    return "errorPage";
}
}

服务等级：

@Service
public class EmployeeService {
private final EmployeeRepository empRepo;

@Autowired
public EmployeeService(EmployeeRepository empRepo) {
    this.empRepo = empRepo;
}

public List<Employee> findByFullName(String fullName) {
    return empRepo.findByFirstNameContainingIgnoreCaseOrLastNameContainingIgnoreCase(fullName, fullName);
}

public List<Employee> findByFirstName(String firstName) {
    return empRepo.findByFirstNameContainingIgnoreCase(firstName);
}

public List<Employee> findByLastName(String lastName) {
    return empRepo.findByLastNameContainingIgnoreCase(lastName);
}

}
存储库类：

@Repository
public interface EmployeeRepository extends 
JpaRepository<Employee, Long> {
List<Employee> findByFirstNameContainingIgnoreCaseOrLastNameContainingIgnoreCase(String firstName, String lastName);

List<Employee> findByFirstNameContainingIgnoreCase(String firstName);

List<Employee> findByLastNameContainingIgnoreCase(String lastName);

}