In this lesson, we are going to add REST controllers to our application. Remember that in the last tutorial, we added a business service.<\/p>\n
Now the question is: What is a REST Controller? Let’s see<\/p>\n
<\/p>\n
<\/p>\n
A REST is a java class that is annotated with the @RestController annotation. But what does a REST Controller do? A REST controller contains the function that executes when a url request is received.<\/p>\n
So a REST controller is the endpoint that receives requests coming from a client. Additionally, a REST controller the code that sends back a response to the client after the request is executed.<\/p>\n
Finally, a REST controller provides mappings that map particular url patterns to methods defined in the controller<\/p>\n
<\/p>\n
You need to add a controller that responds to user-related requests. For example, request for list of users. Or maybe request for a single user. Or even to add or delete a user.<\/p>\n
Add a new file to to the users package. Name it UserController. I’ve written the content out for you. So you can copy and paste.<\/p>\n
<\/p>\n
package<\/span> user;<\/span>\r\n\r\nimport<\/span> org.springframework.web.bind.annotation.RestController<\/span>;<\/span>\r\n\r\n@RestController<\/span>\r\npublic<\/span> class<\/span> UserController<\/span> {<\/span>\r\n\r\n}<\/span>\r\n<\/pre>\n <\/p>\n
3. Add the Post Controller<\/strong><\/h4>\nYou need to add a controller that responds to post-related requests. For example, request for list of posts. Or maybe request for posts by user or by date. Or even to add or delete a post.<\/p>\n
Add a new file to to the post package. Name it PostController. I’ve written the content out for you. So you can copy and paste.<\/p>\n
<\/p>\n
<\/p>\n
package<\/span> post;<\/span>\r\n\r\nimport<\/span> org.springframework.web.bind.annotation.RestController<\/span>;<\/span>\r\n\r\n@RestController<\/span>\r\npublic<\/span> class<\/span> PostController<\/span> {<\/span>\r\n\r\n}<\/span>\r\n<\/pre>\n <\/p>\n
4. Add the Location Controller<\/strong><\/h4>\nYou need to add a controller that responds to location-related requests. For example, request for list of Locations. Or maybe request for a single location. Or even to add or delete a location.<\/p>\n
Add a new file to to the location package. Name it LocationController. I’ve written the content out for you. So you can copy and paste.<\/p>\n
<\/p>\n
package<\/span> location;<\/span>\r\n\r\nimport<\/span> org.springframework.web.bind.annotation.RestController<\/span>;<\/span>\r\n\r\n@RestController<\/span>\r\npublic<\/span> class<\/span> LocationController<\/span> {<\/span>\r\n\t\r\n\r\n}<\/span>\r\n<\/pre>\n <\/p>\n
In the next tutorial, we would then add logic for all these methods.<\/p>\n","protected":false},"excerpt":{"rendered":"
In this lesson, we are going to add REST controllers to our application. Remember that in the last tutorial, we added a business service. Now … <\/p>\n","protected":false},"author":1,"featured_media":77,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2],"tags":[10],"class_list":["post-76","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spring-boot-tutorials","tag-spring-boot-tutorials"],"_links":{"self":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/comments?post=76"}],"version-history":[{"count":2,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76\/revisions\/79"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media\/77"}],"wp:attachment":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media?parent=76"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/categories?post=76"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/tags?post=76"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}