Spring MVC Basic
Understanding Spring MVC
DispatcherServlet
- Controller
- xxxResolver
- ViewResolver
- HandlerExceptionResolver
- MultipartResolver
- HandlerMapping
Spring MVC Annotations
@Controller@RestController@RequestMapping@GetMapping/@PostMapping@PutMapping/@DeleteMapping@RequestBody/@ResponseBody/@ResponseStatus
Spring Application Context
Diagram
Interface
- BeanFactory
- DefaultListableBeanFactory
- ApplicationContext
- ClassPathXmlApplicationContext
- FileSystemXmlApplicationContext
- AnnotationConfigApplicationContext
- WebApplicationContext
Understanding the Request Handling Process
Bind Attributes
- WebApplicationContext / LocalResolver / ThemeResolver
Process Multipart
- Convert the request to MultipartHttpServletRequest if it's multipart
Handler Processing
- Execute the controller
preandpostlogic if handler found
Process and Render the Model
Custom Processing Method
Custom Mapping Relationship
@Controller
@RequestMapping
- path/method. Specify the path and method
- params/header. Limit the mapping scope
- consumes/produces. Limit request/response format
Some shortcuts
@RestController@GetMapping/@PostMapping/@PutMapping/@DeleteMapping/@PatchMapping@RequestBody/@ResponseBody/@ResponseStatus@PathVariable/@RequestParam/@RequestHeaderHttpEntity/ResponseEntity
Custom Type Converter
Implement WebMvcConfigurer
- Spring Boot implements one
WebMvcAutoConfiguration - Add User-defined
Converter - Add User-defined
Formatter
Custom Validation
- Validate the binding result through
Validator - Hibernate Validator
@ValidAnnotation- BindingResult
Multipart Upload
- Configure MultipartResolver
- Spring Boot supports auto-configure
MultipartAutoConfiguration - Support Type
multipart/form-data - MultipartFile type