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@SpringBootApplication
public class SpringSecurityJwtGuideApplication {
      public static void main(java.lang.String[] args) {
        SpringApplication.run(SpringSecurityJwtGuideApplication.class, args);
    }
}

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package org.springframework.boot.autoconfigure;
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = {
		@Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication {
   ......
}
package org.springframework.boot;
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Configuration
public @interface SpringBootConfiguration {
}

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@Service
public class UserService {
  ......
}
@RestController
@RequestMapping("/users")
public class UserController {
   @Autowired
   private UserService userService;
   ......
}

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@Bean
@Scope("singleton")
public Person personSingleton() {
    return new Person();
}

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@Configuration
public class AppConfig {
    @Bean
    public TransferService transferService() {
        return new TransferServiceImpl();
    }
}

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@GetMapping("/users")
public ResponseEntity<List<User>> getAllUsers() {
 return userRepository.findAll();
}

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@PostMapping("/users")
public ResponseEntity<User> createUser(@Valid @RequestBody UserCreateRequest userCreateRequest) {
 return userRespository.save(user);
}

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@PutMapping("/users/{userId}")
public ResponseEntity<User> updateUser(@PathVariable(value = "userId") Long userId,
  @Valid @RequestBody UserUpdateRequest userUpdateRequest) {
  ......
}

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@DeleteMapping("/users/{userId}")
public ResponseEntity deleteUser(@PathVariable(value = "userId") Long userId){
  ......
}

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  @PatchMapping("/profile")
  public ResponseEntity updateStudent(@RequestBody StudentUpdateRequest studentUpdateRequest) {
        studentRepository.updateDetail(studentUpdateRequest);
        return ResponseEntity.ok().build();
    }

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@GetMapping("/klasses/{klassId}/teachers")
public List<Teacher> getKlassRelatedTeachers(
         @PathVariable("klassId") Long klassId,
         @RequestParam(value = "type", required = false) String type ) {
...
}

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@PostMapping("/sign-up")
public ResponseEntity signUp(@RequestBody @Valid UserRegisterRequest userRegisterRequest) {
  userService.save(userRegisterRequest);
  return ResponseEntity.ok().build();
}

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@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserRegisterRequest {
    @NotBlank
    private String userName;
    @NotBlank
    private String password;
    @FullName
    @NotBlank
    private String fullName;
}

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@Value("${wuhan2020}")
String wuhan2020;

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@Component
@ConfigurationProperties(prefix = "library")
class LibraryProperties {
    @NotEmpty
    private String location;
    private List<Book> books;
    @Setter
    @Getter
    @ToString
    static class Book {
        String name;
        String description;
    }
  省略getter/setter
  ......
}

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@Component
@PropertySource("classpath:website.properties")
class WebSite {
    @Value("${url}")
    private String url;
  省略getter/setter
  ......
}

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@Data
@AllArgsConstructor
@NoArgsConstructor
public class Person {
    @NotNull(message = "classId 不能为空")
    private String classId;
    @Size(max = 33)
    @NotNull(message = "name 不能为空")
    private String name;
    @Pattern(regexp = "((^Man$|^Woman$|^UGM$))", message = "sex 值不在可选范围")
    @NotNull(message = "sex 不能为空")
    private String sex;
    @Email(message = "email 格式不正确")
    @NotNull(message = "email 不能为空")
    private String email;
}

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@RestController
@RequestMapping("/api")
public class PersonController {
    @PostMapping("/person")
    public ResponseEntity<Person> getPerson(@RequestBody @Valid Person person) {
        return ResponseEntity.ok().body(person);
    }
}

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@RestController
@RequestMapping("/api")
@Validated
public class PersonController {
    @GetMapping("/person/{id}")
    public ResponseEntity<Integer> getPersonByID(@Valid @PathVariable("id") @Max(value = 5,message = "超过 id 的范围了") Integer id) {
        return ResponseEntity.ok().body(id);
    }
}

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@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {
    /**
     * 请求参数异常处理
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<?> handleMethodArgumentNotValidException(MethodArgumentNotValidException ex, HttpServletRequest request) {
       ......
    }
}

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@Entity
@Table(name = "role")
public class Role {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String description;
    省略getter/setter......
}

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@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

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public enum GenerationType {
    /**
     * 使用一个特定的数据库表格来保存主键
     * 持久化引擎通过关系数据库的一张特定的表格来生成主键,
     */
    TABLE,
    /**
     *在某些数据库中,不支持主键自增长,比如Oracle、PostgreSQL其提供了一种叫做"序列(sequence)"的机制生成主键
     */
    SEQUENCE,
    /**
     * 主键自增长
     */
    IDENTITY,
    /**
     *把主键生成策略交给持久化引擎(persistence engine),
     *持久化引擎会根据数据库在以上三种主键生成 策略中选择其中一种
     */
    AUTO
}

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public @interface GeneratedValue {
    GenerationType strategy() default AUTO;
    String generator() default "";
}

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@Id
@GeneratedValue(generator = "IdentityIdGenerator")
@GenericGenerator(name = "IdentityIdGenerator", strategy = "identity")
private Long id;

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@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

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public class DefaultIdentifierGeneratorFactory
		implements MutableIdentifierGeneratorFactory, Serializable, ServiceRegistryAwareService {
	@SuppressWarnings("deprecation")
	public DefaultIdentifierGeneratorFactory() {
		register( "uuid2", UUIDGenerator.class );
		register( "guid", GUIDGenerator.class );			// can be done with UUIDGenerator + strategy
		register( "uuid", UUIDHexGenerator.class );			// "deprecated" for new use
		register( "uuid.hex", UUIDHexGenerator.class ); 	// uuid.hex is deprecated
		register( "assigned", Assigned.class );
		register( "identity", IdentityGenerator.class );
		register( "select", SelectGenerator.class );
		register( "sequence", SequenceStyleGenerator.class );
		register( "seqhilo", SequenceHiLoGenerator.class );
		register( "increment", IncrementGenerator.class );
		register( "foreign", ForeignGenerator.class );
		register( "sequence-identity", SequenceIdentityGenerator.class );
		register( "enhanced-sequence", SequenceStyleGenerator.class );
		register( "enhanced-table", TableGenerator.class );
	}
	public void register(String strategy, Class generatorClass) {
		LOG.debugf( "Registering IdentifierGenerator strategy [%s] -> [%s]", strategy, generatorClass.getName() );
		final Class previous = generatorStrategyToClassNameMap.put( strategy, generatorClass );
		if ( previous != null ) {
			LOG.debugf( "    - overriding [%s]", previous.getName() );
		}
	}
}

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@Column(name = "user_name", nullable = false, length=32)
private String userName;

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Column(columnDefinition = "tinyint(1) default 1")
private Boolean enabled;

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Entity(name="USER")
public class User {
    ......
    @Transient
    private String secrect; // not persistent because of @Transient
}

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static String secrect; // not persistent because of static
final String secrect = “Satish”; // not persistent because of final
transient String secrect; // not persistent because of transient

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@Lob
private String content;

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@Lob
//指定 Lob 类型数据的获取策略， FetchType.EAGER 表示非延迟 加载，而 FetchType. LAZY 表示延迟加载 ；
@Basic(fetch = FetchType.EAGER)
//columnDefinition 属性指定数据表对应的 Lob 字段类型
@Column(name = "content", columnDefinition = "LONGTEXT NOT NULL")
private String content;

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public enum Gender {
    MALE("男性"),
    FEMALE("女性");
    private String value;
    Gender(String str){
        value=str;
    }
}

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@Entity
@Table(name = "role")
public class Role {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String description;
    @Enumerated(EnumType.STRING)
    private Gender gender;
    省略getter/setter......
}

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@Data
@AllArgsConstructor
@NoArgsConstructor
@MappedSuperclass
@EntityListeners(value = AuditingEntityListener.class)
public abstract class AbstractAuditBase {
    @CreatedDate
    @Column(updatable = false)
    @JsonIgnore
    private Instant createdAt;
    @LastModifiedDate
    @JsonIgnore
    private Instant updatedAt;
    @CreatedBy
    @Column(updatable = false)
    @JsonIgnore
    private String createdBy;
    @LastModifiedBy
    @JsonIgnore
    private String updatedBy;
}

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@Configuration
@EnableJpaAuditing
public class AuditSecurityConfiguration {
    @Bean
    AuditorAware<String> auditorAware() {
        return () -> Optional.ofNullable(SecurityContextHolder.getContext())
                .map(SecurityContext::getAuthentication)
                .filter(Authentication::isAuthenticated)
                .map(Authentication::getName);
    }
}

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@Repository
public interface UserRepository extends JpaRepository<User, Integer> {
    @Modifying
    @Transactional(rollbackFor = Exception.class)
    void deleteByUserName(String userName);
}

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@Transactional(rollbackFor = Exception.class)
public void save() {
  ......
}

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//生成json时将userRoles属性过滤
@JsonIgnoreProperties({"userRoles"})
public class User {
    private String userName;
    private String fullName;
    private String password;
    @JsonIgnore
    private List<UserRole> userRoles = new ArrayList<>();
}

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public class User {
    private String userName;
    private String fullName;
    private String password;
   //生成json时将userRoles属性过滤
    @JsonIgnore
    private List<UserRole> userRoles = new ArrayList<>();
}

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@JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", timezone="GMT")
private Date date;

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@Getter
@Setter
@ToString
public class Account {
    @JsonUnwrapped
    private Location location;
    @JsonUnwrapped
    private PersonInfo personInfo;
  @Getter
  @Setter
  @ToString
  public static class Location {
     private String provinceName;
     private String countyName;
  }
  @Getter
  @Setter
  @ToString
  public static class PersonInfo {
    private String userName;
    private String fullName;
  }
}

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@Getter
@Setter
@ToString
public class Account {
    @JsonUnwrapped
    private Location location;
    @JsonUnwrapped
    private PersonInfo personInfo;
    ......
}

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@SpringBootTest(webEnvironment = RANDOM_PORT)
@ActiveProfiles("test")
@Slf4j
public abstract class TestBase {
  ......
}

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    @Test
    @Transactional
    @WithMockUser(username = "user-id-18163138155", authorities = "ROLE_TEACHER")
    void should_import_student_success() throws Exception {
        ......
    }