class-412.md

Spring RESTful Routing & Static Files

Spring RequestMapping

• RequestMapping — by Path

  

• RequestMapping — the HTTP Method

  

• RequestMapping With the headers Attribute

  @RequestMapping(value = "/ex/foos", headers = "key=val", method = GET)

• RequestMapping Consumes and Produces

  @RequestMapping(value = "/ex/foos", method = GET, headers = "Accept=application/json")

• RequestMapping With Path Variables

  

• RequestMapping With Request Parameters

  

• RequestMapping Corner Cases

  • RequestMapping — Multiple Paths Mapped to the Same Controller Method

    @RequestMapping(value = { "/ex/advanced/bars", "/ex/advanced/foos" }, method = GET)

  • RequestMapping — Multiple HTTP Request Methods to the Same Controller Method

    @RequestMapping(value = "/ex/foos/multiple", method = { RequestMethod.PUT, RequestMethod.POST }

  • RequestMapping — a Fallback for All Requests

    @RequestMapping(value = "", method = RequestMethod.GET

  • Ambiguous Mapping Error

    

• New Request Mapping Shortcuts

  

• Spring Configuration

  

CrudRepository ,JpaRepository, and PagingAndSortingRepository in Spring Data

• CrudRepository :provides CRUD functions
• PagingAndSortingRepository provides methods to do pagination and sort records
• JpaRepository provides JPA related methods such as flushing the persistence context and delete records in a batch

typical CRUD functionality:

• save(…) – save an Iterable of entities. Here, we can pass multiple objects to save them in a batch
• findOne(…) – get a single entity based on passed primary key value
• findAll() – get an Iterable of all available entities in database
• count() – return the count of total entities in a table
• delete(…) – delete an entity based on the passed object
• exists(…) – verify if an entity exists based on the passed primary key value

JpaRepository methods :

• findAll() – get a List of all available entities in database
• findAll(…) – get a List of all available entities and sort them using the provided condition
• save(…) – save an Iterable of entities. Here, we can pass multiple objects to save them in a batch
• flush() – flush all pending task to the database
• saveAndFlush(…) – save the entity and flush changes immediately
• deleteInBatch(…) – delete an Iterable of entities. Here, we can pass multiple objects to delete them in a batch