jackson 实体转json json字符串转实体

@Autowired
ObjectMapper objectMapper;

//实体转json

  String data = "";  //一个json串

  Student stu = new Student ();

　stu = objectMapper.readValue(data, Student .class);// json字符串转实体

public <T> String writeAsString(T t) throws JsonProcessingException {
    return objectMapper.writeValueAsString(t);
}

 
String aa = writeAsString(stu);

 

//json转实体

    public <T> T readValue(String data) {
        try {
            return objectMapper.readValue(data, new TypeReference<T>() {
            });
        } catch (Exception e) {
            // TODO: handle exception
        }
        return null;
    }