Java JSON数据反序列化
我从前端获取JSON数据：Java JSON数据反序列化,java,json,deserialization,Java,Json,Deserialization,我从前端获取JSON数据： user {"idUser":5,"fullname":"Bob Marley", "birthday":"1990-12-14", "login":"b.marley", "password":"none","dateCreate":"2014-10-09 15:01","grp":{"idGrp":"2","nameGrp":"client"}} 我想用java反序列化这些数据： User.java public class User implements
user {"idUser":5,"fullname":"Bob Marley", "birthday":"1990-12-14", "login":"b.marley", "password":"none","dateCreate":"2014-10-09 15:01","grp":{"idGrp":"2","nameGrp":"client"}}
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private int idUser;
private String fullname;
private Date birthday;
private String login;
private String password;
private Date dateCreate;
private Grp grp;
//getters and setters
public class UserDeserializer implements JsonDeserializer<User> {
@Override
public User deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
JsonObject jObject = json.getAsJsonObject();
User user = new User();
user.setIdUser(jObject.get("idUser").getAsInt());
user.setFullname(jObject.get("fullname").getAsString());
try {
Date birthday = new SimpleDateFormat("yyyy-MM-dd").parse(jObject.get("birthday").getAsString());
user.setBirthday(birthday);
} catch (ParseException e) {
}
user.setLogin(jObject.get("login").getAsString());
user.setPassword(jObject.get("password").getAsString());
try {
Date dateCreate = new SimpleDateFormat("yyyy-MM-dd HH:mm").parse(jObject.get("dateCreate").getAsString());
user.setDateCreate(dateCreate);
} catch (ParseException e) {
}
Grp grp = context.deserialize(jObject.get("grp"), Grp.class);
user.setGrp(grp);
return user;
}
}
public class UserEdit extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = new GsonBuilder().create();
User user = gson.fromJson(request.getParameter("user"), User.class);
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private int idUser;
private String fullname;
private Date birthday;
private String login;
private String password;
private Date dateCreate;
private Grp grp;
//getters and setters
public class UserDeserializer implements JsonDeserializer<User> {
@Override
public User deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
JsonObject jObject = json.getAsJsonObject();
User user = new User();
user.setIdUser(jObject.get("idUser").getAsInt());
user.setFullname(jObject.get("fullname").getAsString());
try {
Date birthday = new SimpleDateFormat("yyyy-MM-dd").parse(jObject.get("birthday").getAsString());
user.setBirthday(birthday);
} catch (ParseException e) {
}
user.setLogin(jObject.get("login").getAsString());
user.setPassword(jObject.get("password").getAsString());
try {
Date dateCreate = new SimpleDateFormat("yyyy-MM-dd HH:mm").parse(jObject.get("dateCreate").getAsString());
user.setDateCreate(dateCreate);
} catch (ParseException e) {
}
Grp grp = context.deserialize(jObject.get("grp"), Grp.class);
user.setGrp(grp);
return user;
}
}
public class UserEdit extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = new GsonBuilder().create();
User user = gson.fromJson(request.getParameter("user"), User.class);
请帮帮我。使用
yyyy-MM-dd HH:MM:ssyyyy-MM-dd HH:MM:ss我不熟悉这个库，但可能您的UserDeserializer没有在API/框架中正确配置，并且使用了默认的反序列化器（生日是要反序列化的bean中的日期）错误似乎是在API内部绑定中使用了DateTypeAdapter。。。 我不熟悉这个库，但可能您的UserDeserializer没有在API/框架中正确配置，使用了默认的（生日是要反序列化的bean中的日期）这里：
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = new GsonBuilder().create();
GsonBuilderGsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = gsonBuilder.create();
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = new GsonBuilder().create();
GsonBuilderGsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(User.class, new UserDeserializer());
Gson gson = gsonBuilder.create();
要使用配置了用户反序列化器的gsonBuilder。JSON
用户{“idUser”：5开头的用户
生成了格式错误的JSON。开始时真的有用户
吗？@Vinze:你指的是哪一个，处理“任何问题”？zigfridus你确定你的反序列化
方法被调用了吗？@JonathanM是的，确实有用户
在开头：http://localhost:8080/UserEdit?user=%7B%22idUser%22%3A5%2C%22...
@njzk2我错读了这个问题，我想…删除了我的评论。用户代码中似乎没有堆栈条目，因此可能是误用了f API…the