<dependencies> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.12.1</version> </dependency> </dependencies> String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}"; ObjectMapper objectMapper = new ObjectMapper(); Map<String, Object> jsonData = objectMapper.readValue(jsonString, new TypeReference<Map<String,Object>>(){}); Person person = new Person("John", 30, "New York"); ObjectMapper objectMapper = new ObjectMapper(); String jsonString = objectMapper.writeValueAsString(person); String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}"; ObjectMapper objectMapper = new ObjectMapper(); Person person = objectMapper.readValue(jsonString, Person.class);