ObjectMapper = new new ObjectMapper ObjectMapper ();
// deserialization time if the other attributes much, do not throw an exception
objectMapper.configure (DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
//如果是空对象的时候,不抛异常
objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
//序列化的时候序列对象的所有属性
objectMapper.setSerializationInclusion(Include.ALWAYS);
//取消时间的转化格式,默认是时间戳,可以取消,同时需要设置要表现的时间格式
objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"))
//将对象转换为json格式数据
String jsonStr = objectMapper .writeValueAsString(javabean);
//将对象转换为字节数组
byte[] byteArr = objectMapper .writeValueAsBytes(Javabean);
//将json数据读进来转换为javabean对象
Javabean javabean = objectMapper .readValue(jsonStr, javabean.class);
//将javabean对象写出去转为json格式数据
objectMapper.writeValue();
More knowledge reference https://www.cnblogs.com/xuwenjin/p/8976696.html