Java Jackson ObjectMapper 를 이용한 Serialize / Deserialize

Java Jackson ObjectMapper

1. pom.xml 에 dependency 추가

• xml 내용

  <dependency>
   <groupId>com.fasterxml.jackson.core</groupId>
   <artifactId>jackson-databind</artifactId>
   <version>${jackson.version}</version>
  </dependency>

  2. Java object to json Serialize
• Value Object Class

  @Data  
  public class TestValue {  
   public String name;  
   public int age;  
  }

• ObjectMapper를 이용해 Object to Json

  ObjectMapper objectMapper = new ObjectMapper();
  TestValue testValue = new TestValue();  
  testValue.setAge(30);  
  testValue.setName("name");
  //Object to Json
  // json file로 저장
  objectMapper.writeValue(new File("test.json"), testValue);
  // json String으로 저장
  String jsonStr = objectMapper.writeValueAsString(testValue);

• Serialize된 Json 내용

  {"name":"name","age":30}

• Json to Java Object

  objectMapper.readValue(new File("test.json"), TestValue.class);