Java system properties have higher precedence than the properties loaded from

@TestPropertySource.

Properties defined @PropertySource are not loaded if @TestPropertySource is used.

@TestPropertySource annotation loads a properties file relative to the root of the project by default.

Inlined properties defined in @TestPropertySource can be used to override properties defined in property files.

Add @PathVariable(“id”) String accountId argument to the update() handler method.

Add @PathVariable long accountId argument to the update() handler method.

Add @RequestParam long accountId argument to the update() handler method.

Add @RequestParam(“id”) String accountId argument to the update() handler method.

@Autowired public void setFoo (Foo foo) {…}

@Autowired @Qualifier (“foo3”) Foo foo;

@Autowired public void setFoo (@Qualifier (“foo1”) Foo foo) {…}

@Autowired private Foo foo;

@Autowired private Foo foo2;

@Autowired public void setFoo(Foo foo2) {…}

The advice is invoked only if the method returns successfully but not if it throws an exception.

The @AfterReturning advice allows behavior to be added after a method returns even if it throws an exception.

The advice has complete control over the method invocation; it could even prevent the method from being called at all.

Typically used to prevent any exception, thrown by the advised method, from propagating up the call-stack.

Access control can be configured at the method level.

A special Java Authentication and Authorization Service (JAAS) policy file needs to be configured.

Authentication data can be accessed using a variety of different mechanisms, including databases and LDAP.

In the authorization configuration, the usage of permitAll () allows bypassing Spring security completely.

It provides a strict implementation of the Java EE Security specification.

@Value must be used for environment variables, as @ConfigurationProperties cannot access the environment.

@Value supports relaxed binding of properties, but not property binding through SpEL.

@ConfigurationProperties is preferable over @Value when type-safety during property binding is a concern.

@ConfigurationProperties only bind properties from .properties files, not from .yml files.

@ConfigurationProperties supports relaxed binding of properties, but not property binding through SpEL.

Spring Data implementations exist for many data storage types, such as MongoDB, Neo4j, and Redis.

Spring Data works by applying the JPA annotations to data stores such as MongoDB, Neo4j, and Redis.

Spring Data can greatly reduce the amount of “boilerplate” code typically needed for data access.

Spring Data is specifically designed for JPA, JDBC, and relational database access only.

Spring Data cannot be used together with Spring MVC.

Annotate the update() handler method with @PutMapping(“/store/orders/{id”}”, HttpStatus.NO_CONTENT).

Annotate the update() handler method with @ResponseStatus(HttpStatus.NO_CONTENT).

Annotate the update() handler method with @ResponseEntity(204).

The update() handler method cannot return a void type, it must return a ResponseEntity type.

@Autowired fields are injected after any config methods are invoked.

Multiple arguments can be injected into a single method using @Autowired.

By default, if a dependency cannot be satisfied with @Autowired, Spring throws a RuntimeException.

If @Autowired is used on a class, field injection is automatically performed for all dependencies.

@Autowired can be used to inject references into BeanPostProcessor and

BeanFactoryPostProcessor.

Use of @Qualifier annotation on the class and @Autowired annotation either on a field or setter methods.

Use of @Qualifier and @Autowired annotations together with setter methods.

Use of @Qualifier annotation only with setter methods (@Autowired is optional for setters).

Use of @Qualifier and @Autowired annotations together on a field.

Use of @Qualifier annotation only on a field (@Autowired is optional for fields).