BAEL-4223: Displaying Spring error messages with Thymeleaf (#10652)

2021-04-14 01:25:33 +05:30
parent 45b8a5d399
commit e0b4e6bcd6
8 changed files with 284 additions and 1 deletions
@@ -0,0 +1,82 @@
+package com.baeldung.thymeleaf.errors;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+
+@Entity
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @NotEmpty(message = "User's name cannot be empty.")
+    @Size(min = 5, max = 250)
+    private String fullName;
+
+    @NotEmpty(message = "User's email cannot be empty.")
+    @Size(min = 7, max = 320)
+    private String email;
+
+    @NotNull(message = "User's age cannot be null.")
+    @Min(value = 18)
+    private Integer age;
+
+    private String country;
+
+    private String phoneNumber;
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getCountry() {
+        return country;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public String getPhoneNumber() {
+        return phoneNumber;
+    }
+
+    public void setPhoneNumber(String phoneNumber) {
+        this.phoneNumber = phoneNumber;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFullName() {
+        return fullName;
+    }
+
+    public void setFullName(String fullName) {
+        this.fullName = fullName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+}
@@ -0,0 +1,46 @@
+package com.baeldung.thymeleaf.errors;
+
+import javax.validation.Valid;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.ObjectError;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
+public class UserController {
+
+    @Autowired
+    private UserRepository repository;
+
+    @Autowired
+    private UserValidationService validationService;
+
+    @GetMapping("/add")
+    public String showAddUserForm(User user) {
+        return "errors/addUser";
+    }
+
+    @PostMapping("/add")
+    public String addUser(@Valid User user, BindingResult result, Model model) {
+
+        String err = validationService.validateUser(user);
+
+        if (!err.isEmpty()) {
+            ObjectError error = new ObjectError("globalError", err);
+            result.addError(error);
+        }
+
+        if (result.hasErrors()) {
+            return "errors/addUser";
+        }
+
+        repository.save(user);
+        model.addAttribute("users", repository.findAll());
+        return "errors/home";
+    }
+
+}
@@ -0,0 +1,8 @@
+package com.baeldung.thymeleaf.errors;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends JpaRepository<User, Long> {
+}
@@ -0,0 +1,22 @@
+package com.baeldung.thymeleaf.errors;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserValidationService {
+
+    public String validateUser(User user) {
+
+        String message = "";
+
+        if (user.getCountry() != null && user.getPhoneNumber() != null) {
+            if (user.getCountry()
+                .equalsIgnoreCase("India")
+                && !user.getPhoneNumber()
+                    .startsWith("91")) {
+                message = "Phone number is invalid for " + user.getCountry();
+            }
+        }
+        return message;
+    }
+}