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wynnteowynnteo
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Bael 6906 (#16997)
* spring validator interface * added mockmvc * change file name * change file name
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‎spring-boot-modules/spring-boot-validation/src/main/java/com/baeldung/springvalidator/AppConfig.java‎

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package com.baeldung.springvalidator;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.validation.Validator;
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
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@Configuration
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public class AppConfig implements WebMvcConfigurer {
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@Bean
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public UserValidator userValidator() {
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return new UserValidator();
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}
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}

‎spring-boot-modules/spring-boot-validation/src/main/java/com/baeldung/springvalidator/User.java‎

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package com.baeldung.springvalidator;
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public class User {
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private String name;
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private String email;
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private int age;
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public User() {
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}
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public User(String name, String emailmail, int age) {
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this.name = name;
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this.email = email;
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this.age = age;
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}
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// Getters and Setters
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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}

‎spring-boot-modules/spring-boot-validation/src/main/java/com/baeldung/springvalidator/UserApplication.java‎

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package com.baeldung.springvalidator;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import com.baeldung.spring.servicevalidation.SpringServiceLayerValidationApp;
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@SpringBootApplication
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public class UserApplication {
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public static void main(String[] args) {
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SpringApplication.run(UserApplication.class, args);
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}
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}

‎spring-boot-modules/spring-boot-validation/src/main/java/com/baeldung/springvalidator/UserController.java‎

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package com.baeldung.springvalidator;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.ResponseEntity;
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import org.springframework.validation.BeanPropertyBindingResult;
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import org.springframework.validation.Errors;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.PutMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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@RestController
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@RequestMapping("/api/users")
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public class UserController {
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@Autowired
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private UserValidator userValidator;
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@PostMapping
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public ResponseEntity<?> createUser(@RequestBody User user) {
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Errors errors = new BeanPropertyBindingResult(user, "user");
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userValidator.validate(user, errors, "create");
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if (errors.hasErrors()) {
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return ResponseEntity.badRequest().body(errors.getAllErrors());
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}
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// Save the user object to the database
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return ResponseEntity.ok("User created successfully!");
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}
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@PutMapping("/{id}")
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public ResponseEntity<?> updateUser(@PathVariable Long id, @RequestBody User user) {
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Errors errors = new BeanPropertyBindingResult(user, "user");
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userValidator.validate(user, errors, "update");
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if (errors.hasErrors()) {
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return ResponseEntity.badRequest().body(errors.getAllErrors());
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}
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// Update the user object in the database
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return ResponseEntity.ok("User updated successfully!");
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}
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}

‎spring-boot-modules/spring-boot-validation/src/main/java/com/baeldung/springvalidator/UserValidator.java‎

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package com.baeldung.springvalidator;
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import org.springframework.util.StringUtils;
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import org.springframework.validation.Errors;
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import org.springframework.validation.Validator;
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public class UserValidator implements Validator {
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@Override
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public boolean supports(Class<?> clazz) {
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return User.class.isAssignableFrom(clazz);
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}
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@Override
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public void validate(Object target, Errors errors) {
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User user = (User) target;
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if (StringUtils.isEmpty(user.getName())) {
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errors.rejectValue("name", "name.required");
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}
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if (StringUtils.isEmpty(user.getEmail())) {
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errors.rejectValue("email", "email.required");
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}
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// Add more validation rules as needed
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}
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public void validate(Object target, Errors errors, Object... validationHints) {
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User user = (User) target;
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if (validationHints.length > 0) {
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if (validationHints[0] == "create") {
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if (StringUtils.isEmpty(user.getName())) {
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errors.rejectValue("name", "name.required","Name cannot be empty");
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}
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if (StringUtils.isEmpty(user.getEmail())) {
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errors.rejectValue("email", "email.required" , "Invalid email format");
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}
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if (user.getAge() < 18 || user.getAge() > 65) {
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errors.rejectValue("age", "user.age.outOfRange", new Object[]{18, 65}, "Age must be between 18 and 65");
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}
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} else if (validationHints[0] == "update") {
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// Perform update-specific validation
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if (StringUtils.isEmpty(user.getName()) && StringUtils.isEmpty(user.getEmail())) {
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errors.rejectValue("name", "name.or.email.required", "Name or email cannot be empty");
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}
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}
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} else {
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// Perform default validation
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if (StringUtils.isEmpty(user.getName())) {
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errors.rejectValue("name", "name.required");
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}
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if (StringUtils.isEmpty(user.getEmail())) {
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errors.rejectValue("email", "email.required");
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}
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}
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}
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}

‎spring-boot-modules/spring-boot-validation/src/test/java/com/baeldung/springvalidator/UserControllerIntegrationTest.java‎

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package com.baeldung.springvalidator;
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import static org.mockito.Mockito.*;
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import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
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import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
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import org.springframework.boot.test.mock.mockito.MockBean;
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import org.springframework.http.MediaType;
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import org.springframework.test.web.servlet.MockMvc;
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import org.springframework.validation.Errors;
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@WebMvcTest(UserController.class)
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public class UserControllerIntegrationTest {
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@Autowired
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private MockMvc mockMvc;
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@MockBean
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private UserValidator userValidator;
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private ObjectMapper objectMapper;
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@BeforeEach
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void setUp() {
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objectMapper = new ObjectMapper();
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}
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@Test
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void givenValidUser_whenCreateUser_thenReturnsOk() throws Exception {
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User validUser = new User("John Doe", "[email protected]", 30);
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doNothing().when(userValidator).validate(any(), any(), eq("create"));
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mockMvc.perform(post("/api/users")
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(validUser)))
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.andExpect(status().isOk())
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.andExpect(content().string("User created successfully!"));
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}
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@Test
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void givenInvalidUser_whenCreateUser_thenReturnsBadRequest() throws Exception {
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User invalidUser = new User("", "", 30);
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doAnswer(invocation -> {
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Errors errors = invocation.getArgument(1);
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errors.rejectValue("name", "name.required", "Name cannot be empty");
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errors.rejectValue("email", "email.required", "Invalid email format");
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return null;
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}).when(userValidator).validate(any(), any(), eq("create"));
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mockMvc.perform(post("/api/users")
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(invalidUser)))
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.andExpect(status().isBadRequest())
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.andExpect(jsonPath("$[0].defaultMessage").value("Name cannot be empty"))
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.andExpect(jsonPath("$[1].defaultMessage").value("Invalid email format"));
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}
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@Test
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void givenValidUser_whenUpdateUser_thenReturnsOk() throws Exception {
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User validUser = new User("John Doe", "[email protected]", 30);
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doNothing().when(userValidator).validate(any(), any(), eq("update"));
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mockMvc.perform(put("/api/users/1")
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(validUser)))
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.andExpect(status().isOk())
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.andExpect(content().string("User updated successfully!"));
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}
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@Test
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void givenInvalidUser_whenUpdateUser_thenReturnsBadRequest() throws Exception {
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User invalidUser = new User("", "", 30);
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doAnswer(invocation -> {
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Errors errors = invocation.getArgument(1);
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errors.rejectValue("name", "name.or.email.required", "Name or email cannot be empty");
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return null;
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}).when(userValidator).validate(any(), any(), eq("update"));
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mockMvc.perform(put("/api/users/1")
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(invalidUser)))
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.andExpect(status().isBadRequest())
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.andExpect(jsonPath("$[0].defaultMessage").value("Name or email cannot be empty"));
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}
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}

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