{"id":106,"date":"2019-03-09T11:28:46","date_gmt":"2019-03-09T11:28:46","guid":{"rendered":"https:\/\/www.kindsonthegenius.com\/spring-boot\/?p=106"},"modified":"2019-03-12T14:23:06","modified_gmt":"2019-03-12T14:23:06","slug":"13-spring-boot-write-update-methods","status":"publish","type":"post","link":"https:\/\/kindsonthegenius.com\/spring-boot\/13-spring-boot-write-update-methods\/","title":{"rendered":"Spring Boot – Write UPDATE Methods"},"content":{"rendered":"

In this chapter, we are going to write the Update Methods (PUT) to update records.<\/p>\n

So this follows from the same procedure as with the POST methods.<\/p>\n

 <\/p>\n

    \n
  1. Write the updateLocation Methods<\/a><\/li>\n
  2. Write the updateUser Methods<\/a><\/li>\n
  3. Write the updatePost Methods<\/a><\/li>\n
  4. Test the Application<\/a><\/li>\n<\/ol>\n

     <\/p>\n

    1. Write the updateLocation Methods<\/strong><\/h4>\n

    Open the LocationController file and write the updateLocation method as shown below<\/p>\n

    <\/p>\n

    @RequestMapping<\/span>(<\/span>value =<\/span> \"\/locations\/{id}\"<\/span>,<\/span> method =<\/span> RequestMethod.<\/span>PUT<\/span>)<\/span>\r\npublic<\/span> void<\/span> updateLocation<\/span>(<\/span>@RequestBody<\/span> Location location,<\/span> @PathVariable<\/span> String id)<\/span> {\r\n<\/span>\r\n     locationService.<\/span>updateLocation<\/span>(<\/span>id,<\/span> location);\r\n<\/span>\r\n}<\/span><\/pre>\n
    Listing 1.0:updateLocation for the LocaitonController<\/p>\n
     <\/p>\n
    After you write this code, you will have an error. So you need to\u00a0add the updateLocation method in the LocationService file as shown below<\/p>\n
    <\/p>\n
    public<\/span> void<\/span> updateLocation<\/span>(<\/span>String id,<\/span> Location location)<\/span> {\r\n<\/span>\r\n   for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> locations.<\/span>size<\/span>();<\/span> i++)<\/span> {\r\n<\/span>\r\n\tLocation l =<\/span> locations.<\/span>get<\/span>(<\/span>i);\r\n<\/span>\r\n\tif<\/span> (<\/span>l.<\/span>getId<\/span>().<\/span>equals<\/span>(<\/span>id))<\/span> {<\/span>\r\n\t    locations.<\/span>set<\/span>(<\/span>i,<\/span> location);<\/span>\r\n\t}<\/span>\r\n   }<\/span>\t\t\r\n}<\/span>\r\n<\/pre>\n
    Listing 1.1: updateLocation for the LocationService class<\/p>\n
     <\/p>\n
    In the code above, we simply loop through the collection to find a matching id. Then we replace location at that position with the passed in Location.<\/p>\n
     <\/p>\n
     <\/p>\n
    2. Write the updateUser Methods<\/strong><\/h4>\n
    Open the UserController file and write the updateUser method as shown below<\/p>\n
    <\/p>\n
    @RequestMapping<\/span>(<\/span>value=<\/span>\"\/users\/{id}\"<\/span>,<\/span> method =<\/span> RequestMethod.<\/span>PUT<\/span>)\r\n<\/span>public<\/span> void<\/span> getUser<\/span>(<\/span>@PathVariable<\/span> String id,<\/span> @RequestBody<\/span> User user)<\/span> {\r\n<\/span>\r\n    userService.<\/span>updateUser<\/span>(<\/span>id,<\/span> user);\r\n<\/span>\r\n}<\/span>\r\n<\/pre>\n
    Listing 1.2: updateUser for the UserController class<\/p>\n
     <\/p>\n
    Similarly, add the updateUser method in the UserService file as shown below<\/p>\n
    <\/p>\n
    public<\/span> void<\/span> updateUser<\/span>(<\/span>String id,<\/span> User user)<\/span> {\r\n<\/span>\r\n    for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> users.<\/span>size<\/span>();<\/span> i++)<\/span> {\r\n<\/span>\r\n\tUser u =<\/span> users.<\/span>get<\/span>(<\/span>i);\r\n<\/span>\r\n\tif<\/span>(<\/span>u.<\/span>getId<\/span>().<\/span>equals<\/span>(<\/span>id))<\/span> {\r\n<\/span>\r\n\t     users.<\/span>set<\/span>(<\/span>i,<\/span> user);\r\n<\/span>\r\n\t     return<\/span>;<\/span>\r\n\t}<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/pre>\n
    Listing 1.3:updateUser for the UserService class<\/p>\n
     <\/p>\n
     <\/p>\n
    3. Write the updatePost Methods<\/strong><\/h4>\n
    Open the PostController file and write the updatedPost method as shown below.<\/p>\n
    <\/p>\n
    @RequestMapping<\/span>(<\/span>value=<\/span>\"\/posts\/{id}\"<\/span>,<\/span> method =<\/span> RequestMethod.<\/span>PUT<\/span>)\r\n<\/span>public<\/span> void<\/span> updatePost<\/span>(<\/span>@PathVariable<\/span> String id,<\/span> @RequestBody<\/span> Post post)<\/span> {\r\n<\/span>\r\n      postService.<\/span>updatePost<\/span>(<\/span>id,<\/span> post);\r\n<\/span>\r\n}<\/span>\r\n<\/pre>\n
    Listing 1.4: updatePost for the PostController class<\/p>\n
     <\/p>\n
    Similarly, add the updatePost method in the LocationService file as shown below
    \n<\/p>\n
    public<\/span> void<\/span> updatePost<\/span>(<\/span>String id,<\/span> Post post)<\/span> {<\/span>\r\n\r\n    for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> posts.<\/span>size<\/span>();<\/span> i++)<\/span> {<\/span>\r\n\r\n\tPost p =<\/span> posts.<\/span>get<\/span>(<\/span>i);<\/span>\r\n\r\n\tif<\/span>(<\/span>p.<\/span>equals<\/span>(<\/span>post))<\/span> {\r\n<\/span>\r\n\t     posts.<\/span>set<\/span>(<\/span>i,<\/span> post);<\/span>\r\n\t}<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/pre>\n
    Listing 1.5:updatePost for the postService class<\/p>\n
     <\/p>\n
     <\/p>\n
    4. Test the Application<\/strong><\/h4>\n
    Now, you can use Advanced REST Client to test the update methods.<\/p>\n
    You do it almost the same way as the POST methods. But this time you need to specify the id in the url as well.<\/p>\n
    I recommend you watch the video.<\/p>\n
    Next, we would write the DELETE methods.<\/p>\n","protected":false},"excerpt":{"rendered":"
    In this chapter, we are going to write the Update Methods (PUT) to update records. So this follows from the same procedure as with the … <\/p>\n","protected":false},"author":1,"featured_media":108,"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":[],"class_list":["post-106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spring-boot-tutorials"],"_links":{"self":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/106","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=106"}],"version-history":[{"count":3,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/106\/revisions"}],"predecessor-version":[{"id":111,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/posts\/106\/revisions\/111"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media\/108"}],"wp:attachment":[{"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/media?parent=106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/categories?post=106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kindsonthegenius.com\/spring-boot\/wp-json\/wp\/v2\/tags?post=106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}