{"id":76,"date":"2019-02-28T06:34:16","date_gmt":"2019-02-28T06:34:16","guid":{"rendered":"https:\/\/www.kindsonthegenius.com\/spring-boot\/?p=76"},"modified":"2019-03-02T04:07:54","modified_gmt":"2019-03-02T04:07:54","slug":"08-spring-boot-add-rest-controllers","status":"publish","type":"post","link":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/","title":{"rendered":"Spring Boot – Add REST Controllers"},"content":{"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.<\/p>\n

Now the question is: What is a REST Controller? Let’s see<\/p>\n

 <\/p>\n

    \n
  1. What is a Rest Controller<\/a><\/li>\n
  2. Add the User Controller<\/a><\/li>\n
  3. Add the Post Controller<\/a><\/li>\n
  4. Add the Location Controller<\/a><\/li>\n<\/ol>\n

     <\/p>\n

    1. What is a REST Controller?<\/strong><\/h4>\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

    2. Add the User Controller<\/strong><\/h4>\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>\n
    You 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>\n
    You 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"],"yoast_head":"\nSpring Boot - Add REST Controllers - Learn Spring Boot<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spring Boot - Add REST Controllers - Learn Spring Boot\" \/>\n<meta property=\"og:description\" content=\"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 …\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/\" \/>\n<meta property=\"og:site_name\" content=\"Learn Spring Boot\" \/>\n<meta property=\"article:published_time\" content=\"2019-02-28T06:34:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-03-02T04:07:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"827\" \/>\n\t<meta property=\"og:image:height\" content=\"451\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"kindsonthegenius\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"kindsonthegenius\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/\"},\"author\":{\"name\":\"kindsonthegenius\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/#\\\/schema\\\/person\\\/7f8fc5792578d2ff54003fcebe6c46b5\"},\"headline\":\"Spring Boot – Add REST Controllers\",\"datePublished\":\"2019-02-28T06:34:16+00:00\",\"dateModified\":\"2019-03-02T04:07:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/\"},\"wordCount\":361,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/wp-content\\\/uploads\\\/sites\\\/7\\\/2019\\\/02\\\/Add-a-Rest-Controllers-to-Spring-Boot.jpg\",\"keywords\":[\"Spring Boot Tutorials\"],\"articleSection\":[\"Spring Boot Tutorials\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/\",\"url\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/\",\"name\":\"Spring Boot - Add REST Controllers - Learn Spring Boot\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/wp-content\\\/uploads\\\/sites\\\/7\\\/2019\\\/02\\\/Add-a-Rest-Controllers-to-Spring-Boot.jpg\",\"datePublished\":\"2019-02-28T06:34:16+00:00\",\"dateModified\":\"2019-03-02T04:07:54+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/#\\\/schema\\\/person\\\/7f8fc5792578d2ff54003fcebe6c46b5\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/wp-content\\\/uploads\\\/sites\\\/7\\\/2019\\\/02\\\/Add-a-Rest-Controllers-to-Spring-Boot.jpg\",\"contentUrl\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/wp-content\\\/uploads\\\/sites\\\/7\\\/2019\\\/02\\\/Add-a-Rest-Controllers-to-Spring-Boot.jpg\",\"width\":827,\"height\":451},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/08-spring-boot-add-rest-controllers\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Spring Boot – Add REST Controllers\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/#website\",\"url\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/\",\"name\":\"Learn Spring Boot\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/#\\\/schema\\\/person\\\/7f8fc5792578d2ff54003fcebe6c46b5\",\"name\":\"kindsonthegenius\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g\",\"caption\":\"kindsonthegenius\"},\"url\":\"https:\\\/\\\/www.kindsonthegenius.com\\\/spring-boot\\\/author\\\/kindsonthegenius-3\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Spring Boot - Add REST Controllers - Learn Spring Boot","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/","og_locale":"en_US","og_type":"article","og_title":"Spring Boot - Add REST Controllers - Learn Spring Boot","og_description":"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 …","og_url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/","og_site_name":"Learn Spring Boot","article_published_time":"2019-02-28T06:34:16+00:00","article_modified_time":"2019-03-02T04:07:54+00:00","og_image":[{"width":827,"height":451,"url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg","type":"image\/jpeg"}],"author":"kindsonthegenius","twitter_card":"summary_large_image","twitter_misc":{"Written by":"kindsonthegenius","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#article","isPartOf":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/"},"author":{"name":"kindsonthegenius","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/#\/schema\/person\/7f8fc5792578d2ff54003fcebe6c46b5"},"headline":"Spring Boot – Add REST Controllers","datePublished":"2019-02-28T06:34:16+00:00","dateModified":"2019-03-02T04:07:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/"},"wordCount":361,"commentCount":0,"image":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg","keywords":["Spring Boot Tutorials"],"articleSection":["Spring Boot Tutorials"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/","url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/","name":"Spring Boot - Add REST Controllers - Learn Spring Boot","isPartOf":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#primaryimage"},"image":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg","datePublished":"2019-02-28T06:34:16+00:00","dateModified":"2019-03-02T04:07:54+00:00","author":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/#\/schema\/person\/7f8fc5792578d2ff54003fcebe6c46b5"},"breadcrumb":{"@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#primaryimage","url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg","contentUrl":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-content\/uploads\/sites\/7\/2019\/02\/Add-a-Rest-Controllers-to-Spring-Boot.jpg","width":827,"height":451},{"@type":"BreadcrumbList","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/08-spring-boot-add-rest-controllers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.kindsonthegenius.com\/spring-boot\/"},{"@type":"ListItem","position":2,"name":"Spring Boot – Add REST Controllers"}]},{"@type":"WebSite","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/#website","url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/","name":"Learn Spring Boot","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.kindsonthegenius.com\/spring-boot\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.kindsonthegenius.com\/spring-boot\/#\/schema\/person\/7f8fc5792578d2ff54003fcebe6c46b5","name":"kindsonthegenius","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/b9d710de456c3d85e5614c3a6992fa3d527425e2ab32b8bd5d85bfbaa235004b?s=96&d=mm&r=g","caption":"kindsonthegenius"},"url":"https:\/\/www.kindsonthegenius.com\/spring-boot\/author\/kindsonthegenius-3\/"}]}},"_links":{"self":[{"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/comments?post=76"}],"version-history":[{"count":2,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/76\/revisions\/79"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media\/77"}],"wp:attachment":[{"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media?parent=76"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/categories?post=76"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/tags?post=76"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}