Jackson反序列化List

1. Jackson:对象转Json

    ObjectMapper mapper = new ObjectMapper();

    //User类转JSON
    String json = mapper.writeValueAsString(user);

2. Jackson:List转Json

List<User> list= new ArrayList<User>();
users.add(user);
// List转Json
String jsonlist = mapper.writeValueAsString(list);

3. Jackson:Json转对象

  ObjectMapper mapper = new ObjectMapper();
  // Json转对象
  User user = mapper.readValue(json, User.class);

4. Jackson:Json转List

ObjectMapper mapper = new ObjectMapper();
//反序列化List
JavaType type = mapper.getTypeFactory().constructParametricType(List.class, User.class);				
List<User> list = mapper.readValue(listJson,type);