Java
Jackson Library
Seung__Yong
2023. 3. 2. 14:25
- build.gradle
implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.3’
- Object to JSON
ObjectMapper objectMapper = new ObjectMapper();
Post post = new Post("제목", "내용");
String jsonData = objectMapper.writeValueAsString(post);
// {"title":"제목","content":"내용"}
- List to JSON
List<Post> posts = postRepository.findAll();
ObjectMapper objectMapper = new ObjectMapper();
String s = objectMapper.writeValueAsString(posts);
/*
[
{
"title" : "t1",
"content" : "c1"
},
{
"title" : "t2",
"content" : "c2"
},
]
*/
- JSON to Object
Post post = objectMapper.readValue(jsonData, Post.class);
//{"title":"제목","content":"내용"} -> Post("제목", "내용")
- JSON to Array
ObjectMapper objectMapper = new ObjectMapper();
Post[] postArr = objectMapper.readValue(jsonStr, Post[].class);
- JSON to List
ObjectMapper objectMapper = new ObjectMapper();
List<Post> postList = objectMapper.readValue(jsonStr, new TypeReference<List<Post>>(){});