Spring Boot JPA错误：“不是受管理的类型：类com.example1.project.User.User”。

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英文:

Spring Boot JPA Error: "Not a managed type: class com.example1.project.User.User

问题

I'm a beginner in Spring Boot and JPA. I'm developing an application using these technologies, but I've run into a problem. When I run the application, I encounter a 'Not a managed type' exception related to my User entity class.

User entity class:

  1. package com.example1.project.User;
  3. import jakarta.persistence.*;
  4. import jakarta.validation.constraints.Email;
  5. import jakarta.validation.constraints.NotBlank;
  7. @Entity
  8. @Table(name = "users")
  9. public class User
  10. {
  11.     @Id
  12.     @GeneratedValue(strategy = GenerationType.IDENTITY)
  13.     private Long id;
  14.     @NotBlank
  15.     private String name;
  16.     @Email
  17.     @NotBlank
  18.     private String email;
  19.     @NotBlank
  20.     private String username;
  21.     @NotBlank
  22.     private String password;
  24.     // Constructors, Getters, and Setters
  25. }

UserRepository:

  1. package com.example1.project.User;
  3. import org.springframework.data.jpa.repository.JpaRepository;
  5. public interface UserRepository extends JpaRepository<User, Long> {
  6.     User findByUsername(String username);
  7. }

UserService:

  1. package com.example1.project.User;
  3. import org.springframework.beans.factory.annotation.Autowired;
  4. import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
  5. import org.springframework.stereotype.Service;
  7. import java.util.List;
  9. @Service
  10. public class UserService {
  11.     // Constructor, authenticateUser method, and other service methods
  12. }

LoginController:

  1. package com.example1.project.Login;
  3. import com.example1.project.User.User;
  4. import com.example1.project.User.UserService;
  5. import org.springframework.beans.factory.annotation.Autowired;
  6. import org.springframework.http.HttpStatus;
  7. import org.springframework.http.ResponseEntity;
  8. import org.springframework.web.bind.annotation.*;
  10. @RestController
  11. @RequestMapping("/api/login")
  12. public class LoginController {
  13.     // Constructor and login method
  14. }

I initially suspected that there might be an issue with the way I had annotated my entity classes, so I double-checked them to make sure I had used the correct annotations. I was expecting that if the annotations were correct, the application would run without any 'Not a managed type' errors. However, even though my entity classes seem to be correctly annotated, the error still persists.

This is my project structure:

  1. src
  2. ├── main
  3. │   └── java
  4. │       └── com.example1.project
  5. │           ├── Login (subpackage)
  6. │           ├── Order (subpackage)
  7. │           ├── Product (subpackage)
  8. │           ├── User (subpackage)
  9. │           └── Application (main class)
  10. │           └── CorsConfig (class)
  11. │           └── SecurityConfiguration (class)
  12. └── test

The new error:

In my MySQL table called product, this table has 4 columns called id, description, name, price, I wanted to send this data from Postman to MySQL:

  1. {
  2.   "name": "Case",
  3.   "price": 19.99
  4. }

But when I press Send, I get a 401 Unauthorized error in Postman, and the URL is http://localhost:8080/api/products.

I added a class called SecurityConfiguration thinking that if I set the username "user" and the password "password," I could go to PostMan → Authorization and add the user and password as credentials, but I get the same error:

SecurityConfiguration:

  1. import org.springframework.context.annotation.Bean;
  2. import org.springframework.context.annotation.Configuration;
  3. import org.springframework.security.core.userdetails.User;
  4. import org.springframework.security.core.userdetails.UserDetails;
  5. import org.springframework.security.provisioning.InMemoryUserDetailsManager;
  7. @Configuration
  8. public class SecurityConfiguration {
  9.     @Bean
  10.     public InMemoryUserDetailsManager userDetailsService() {
  11.         UserDetails user = User.withDefaultPasswordEncoder()
  12.                 .username("user")
  13.                 .password("password")
  14.                 .roles("USER")
  15.                 .build();
  16.         return new InMemoryUserDetailsManager(user);
  17.     }
  18. }

ProductController class:

  1. package com.example1.project.Product;
  3. import org.springframework.beans.factory.annotation.Autowired;
  4. import org.springframework.web.bind.annotation.*;
  6. import java.util.List;
  8. @RestController
  9. @RequestMapping("/api/products")
  10. public class ProductController {
  11.     // Constructor and various endpoints for handling products
  12. }

When I start my application, I get the following in the console:

  1. 2023-08-01T18:05:24.940+03:00  INFO 13520 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
  2. 2023-08-01T18:05:24.941+03:00  INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
  3. 2023-08-01T18:05:24.943+03:00  INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 2 ms
  4. 2023-08-01T18:13:33.563+03:00  WARN 13520 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=7m32s427ms71μs900ns).
英文:

I'm a beginner in Spring Boot and JPA. I'm developing an application using these technologies, but I've run into a problem. When I run the application, I encounter a 'Not a managed type' exception related to my User entity class.

  1. Error starting ApplicationContext. To display the conditions report re-run your application with &#39;debug&#39; enabled.
  3. 2023-07-31 15:11:07.786 ERROR 15380 --- \[           main\] o.s.boot.SpringApplication               : Application run failed
  5. org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name &#39;loginController&#39; defined in file \[C:\-project\\target\\classes\\com\\example1\\project\\Login\\LoginController.class\]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name &#39;userService&#39; defined in file \[C:\-project\\target\\classes\\com\\example1\\project\\User\\UserService.class\]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name &#39;userRepository&#39; defined in com.example1.project.User.UserRepository defined in @EnableJpaRepositories declared on Application: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.example1.project.User.User

User entity class:

  1. package com.example1.project.User;
  3. import jakarta.persistence.*;
  4. import jakarta.validation.constraints.Email;
  5. import jakarta.validation.constraints.NotBlank;
  7. @Entity
  8. @Table(name = &quot;users&quot;)
  9. public class User
  10. {
  11.     @Id
  12.     @GeneratedValue(strategy = GenerationType.IDENTITY)
  13.     private Long id;
  14.     @NotBlank
  15.     private String name;
  16.     @Email
  17.     @NotBlank
  18.     private String email;
  19.     @NotBlank
  20.     private String username;
  21.     @NotBlank
  22.     private String password;
  24.     public User() {}
  26.     // Getters and Setters
  27.     public Long getId() {
  28.         return id;
  29.     }
  31.     public void setId(Long id) {
  32.         this.id = id;
  33.     }
  35.     public String getName() {
  36.         return name;
  37.     }
  39.     public void setName(String name) {
  40.         this.name = name;
  41.     }
  43.     public String getUsername() {
  44.         return username;
  45.     }
  47.     public void setUsername(String username) {
  48.         this.username = username;
  49.     }
  51.     public String getEmail() {
  52.         return email;
  53.     }
  55.     public void setEmail(String email) {
  56.         this.email = email;
  57.     }
  59.     public String getPassword() {
  60.         return password;
  61.     }
  63.     public void setPassword(String password) {
  64.         this.password = password;
  65.     }
  66. }

UserRepository:

  1. package com.example1.project.User;
  4. import org.springframework.data.jpa.repository.JpaRepository;
  6. public interface UserRepository extends JpaRepository&lt;User, Long&gt; {
  7.     User findByUsername(String username);
  9. }

UserService:

  1. package com.example1.project.User;
  3. import org.springframework.beans.factory.annotation.Autowired;
  4. import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
  5. import org.springframework.stereotype.Service;
  7. import java.util.List;
  9. @Service
  10. public class UserService {
  12.     private final UserRepository userRepository;
  14.     @Autowired
  15.     public UserService(UserRepository userRepository) {
  16.         this.userRepository = userRepository;
  17.     }
  18.     public User authenticateUser(String username, String password) {
  19.         User user = userRepository.findByUsername(username);
  21.         if (user != null) {
  22.             BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
  23.             if (passwordEncoder.matches(password, user.getPassword())) {
  24.                 return user; 
  25.             }
  26.         }
  28.         return null; 
  29.     }
  31.     // Implement service methods using the repository methods
  32.     public List&lt;User&gt; getAllUsers() {
  33.         return userRepository.findAll();
  34.     }
  36.     public User getUserById(Long id) {
  37.         return userRepository.findById(id).orElse(null);
  38.     }
  40.     public User saveUser(User user) {
  41.         user.setPassword(new BCryptPasswordEncoder().encode(user.getPassword()));
  42.         return userRepository.save(user);
  43.     }
  45.     public void deleteUser(Long id) {
  46.         userRepository.deleteById(id);
  47.     }
  49.     
  50. }

LoginController:

  1. package com.example1.project.Login;
  3. import com.example1.project.User.User;
  4. import com.example1.project.User.UserService;
  5. import org.springframework.beans.factory.annotation.Autowired;
  6. import org.springframework.http.HttpStatus;
  7. import org.springframework.http.ResponseEntity;
  8. import org.springframework.web.bind.annotation.PostMapping;
  9. import org.springframework.web.bind.annotation.RequestBody;
  10. import org.springframework.web.bind.annotation.RequestMapping;
  11. import org.springframework.web.bind.annotation.RestController;
  13. @RestController
  14. @RequestMapping(&quot;/api/login&quot;)
  15. public class LoginController {
  16.     private final UserService userService;
  18.     @Autowired
  19.     public LoginController(UserService userService) {
  20.         this.userService = userService;
  21.     }
  23.     @PostMapping
  24.     public ResponseEntity&lt;?&gt; login(@RequestBody LoginRequest loginRequest) {
  25.         // Extract username and password from the login request payload
  26.         String username = loginRequest.getUsername();
  27.         String password = loginRequest.getPassword();
  29.        
  30.         User authenticatedUser = userService.authenticateUser(username, password);
  32.         if (authenticatedUser != null) {
  33.             // User is authenticated, return user data or a token (if using token-based authentication)
  34.             return ResponseEntity.ok(authenticatedUser);
  35.         } else {
  36.             // Invalid credentials, return an error response
  37.             return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(&quot;Invalid username or password&quot;);
  38.         }
  39.     }
  40. }

I initially suspected that there might be an issue with the way I had annotated my entity classes, so I double-checked them to make sure I had used the correct annotations. I was expecting that if the annotations were correct, the application would run without any 'Not a managed type' errors. However, even though my entity classes seem to be correctly annotated, the error still persists

This is my project structure:

  1. src
  2. ├── main
  3. │   └── java
  4. │       └── com.example1.project
  5. │                             └──Login(subpackage)
  6. │                             └──Order(subpackage)
  7. │                             └──Product(subpackage)
  8. │                             └──User(subpackage)
  9. │                             └──Application(main class)
  10. │                             └──CorsConfig(class)                          
  11. │                             └──SecurityConfiguration(class)                     
  12. └── test
  14.

The new error:

In my mysql table called product ,this table has 4 columns called id,description,name,price,i wanted to send from postman to mysql this data:

  1. {
  2.   &quot;name&quot;: &quot;Case&quot;,
  3.   &quot;price&quot;: 19.99
  4. }

But when i press Send, i get 401 Unauthorized in postman ,the url is http://localhost:8080/api/products.

I added a class called SecurityConfiguration thinking that if i set the username "user" and the password "password" i could go to PostMan→Authorization and add the user and password as credentials but i get the same error:

  1. import org.springframework.context.annotation.Bean;
  2.         import org.springframework.context.annotation.Configuration;
  3.         import org.springframework.security.core.userdetails.User;
  4.         import org.springframework.security.core.userdetails.UserDetails;
  5.         import org.springframework.security.provisioning.InMemoryUserDetailsManager;
  7.         import javax.sql.DataSource;
  9. @Configuration
  10. public class SecurityConfiguration {
  11.     @Bean
  12.     public InMemoryUserDetailsManager userDetailsService() {
  13.         UserDetails user = User.withDefaultPasswordEncoder()
  14.                 .username(&quot;user&quot;)
  15.                 .password(&quot;password&quot;)
  16.                 .roles(&quot;USER&quot;)
  17.                 .build();
  18.         return new InMemoryUserDetailsManager(user);
  19.     }
  20. }

This is my ProductController class:

  1. package com.example1.project.Product;
  3. import org.springframework.beans.factory.annotation.Autowired;
  4. import org.springframework.web.bind.annotation.*;
  6. import java.util.List;
  8. @RestController
  9. @RequestMapping(&quot;/api/products&quot;)
  10. public class ProductController {
  11.     private final ProductService productService;
  13.     @Autowired
  14.     public ProductController(ProductService productService) {
  15.         this.productService = productService;
  16.     }
  18.     @GetMapping
  19.     public List&lt;Product&gt; getAllProducts() {
  20.         return productService.getAllProducts();
  21.     }
  23.     @GetMapping(&quot;/{id}&quot;)
  24.     public Product getProductById(@PathVariable Long id) {
  25.         return productService.getProductById(id);
  26.     }
  28.     @GetMapping(&quot;/search&quot;)
  29.     public List&lt;Product&gt; searchProducts(@RequestParam String keyword) {
  30.         return productService.searchProducts(keyword);
  31.     }
  33.     @PostMapping
  34.     public Product addProduct(@RequestBody Product product) {
  35.         return productService.saveProduct(product);
  36.     }
  38.     @PutMapping(&quot;/{id}&quot;)
  39.     public Product updateProduct(@PathVariable Long id, @RequestBody Product product) {
  40.         product.setId(id);
  41.         return productService.saveProduct(product);
  42.     }
  44.     @DeleteMapping(&quot;/{id}&quot;)
  45.     public void deleteProduct(@PathVariable Long id) {
  46.         productService.deleteProduct(id);
  47.     }
  48. }

When i start my application i get this in the console:

  1. 2023-08-01T18:05:24.940+03:00  INFO 13520 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet &#39;dispatcherServlet&#39;
  2. 2023-08-01T18:05:24.941+03:00  INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet &#39;dispatcherServlet&#39;
  3. 2023-08-01T18:05:24.943+03:00  INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 2 ms
  4. 2023-08-01T18:13:33.563+03:00  WARN 13520 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=7m32s427ms71&#181;s900ns).

答案1

得分: 0

在你的安全配置类中，你还需要一个允许 httpBasic 认证的 SecurityFilterChain bean，这就是你收到 401 未授权错误的原因，我认为我有帮助。

只需查看文档Configuration中的HttpSecurity模块。

英文:

In your Security Configuration class you also need a bean of SecurityFilterChain that permits httpBasic authentication, its the reason why you get 401 unauthorized, think i was helpful

Just have a look at documentation
Configuration
at HttpSecurity module

huangapple
  • 本文由 发表于 2023年7月31日 23:06:45
  • 转载请务必保留本文链接：https://go.coder-hub.com/76804912.html
  • entity
  • hibernate
  • jpa
  • spring-boot
  • spring-data-jpa
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