<dependencies>
<!-- Jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.2</version>
</dependency>
<!-- Gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.7</version>
</dependency>
<!-- Fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.78</version>
</dependency>
</dependencies>
ObjectMapper objectMapper = new ObjectMapper();
String jsonString = objectMapper.writeValueAsString(object);
Gson gson = new Gson();
String jsonString = gson.toJson(object);
String jsonString = JSON.toJSONString(object);
ObjectMapper objectMapper = new ObjectMapper();
MyObject myObject = objectMapper.readValue(jsonString, MyObject.class);
Gson gson = new Gson();
MyObject myObject = gson.fromJson(jsonString, MyObject.class);
MyObject myObject = JSON.parseObject(jsonString, MyObject.class);
JsonNode rootNode = objectMapper.readTree(jsonString);
JsonNode nestedNode = rootNode.at("/path/to/nestedNode");
String value = nestedNode.asText();
ObjectMapper objectMapper = new ObjectMapper();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
objectMapper.setDateFormat(dateFormat);
