我正在开发一个连接到我开发的REST API的android应用程序。我使用Jersey和Hibernate开发了REST API。在这个API中，我有一个名为findPatientById的方法。下面是它的代码......
休息电话 ----
@GET
@Path("/findPatientById/{idPatient}")
@Produces(MediaType.APPLICATION_JSON)
public Patient findPatientById(@PathParam("idPatient")int idPatient){
PatientService patientService = new PatientService();
Patient patient = patientService.findPatientById(idPatient);
return patient;
}
数据库层 ---
public Patient findPatientById(int idPatient, Session session) {
Patient patient = (Patient) session.get(Patient.class, idPatient);
return patient;
}
服务层 ----
public Patient findPatientById(int idPatient) {
Session session = patientDAOInterface.openCurrentSession();
Transaction transaction = null;
Patient patient = new Patient();
try {
transaction = patientDAOInterface.openTransaction(session);
patient = patientDAOInterface.findPatientById(idPatient, session);
System.out.println("DATE CREATED - "+patient.getDateCreated());
transaction.commit();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
session.close();
Language language = new Language();
if (patient.getLanguage() != null) {
Integer idlanguage = patient.getLanguage().getIdlanguage();
language.setIdlanguage(idlanguage);
patient.setLanguage(language);
}
if (patient.getDiabetesType() != null) {
DiabetesType diabetesType = new DiabetesType();
Integer iddiabetesType = patient.getDiabetesType().getIddiabetesType();
diabetesType.setIddiabetesType(iddiabetesType);
patient.setDiabetesType(diabetesType);
}
// patient.setDateCreated(null);
// patient.setLastUpdated(null);
}
return patient;
}
以下是 Patient Bean
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
public class Patient implements java.io.Serializable {
private Integer idpatient;
private DiabetesType diabetesType;
private Language language;
private String customId;
private String diabetesOther;
private String firstName;
private String lastName;
private String email;
private Date dob;
private String parentEmail;
private String gender;
private Date diagnosedDate;
private Double height;
private Double weight;
private String heightUnit;
private String weightUnit;
private String theme;
private String userName;
private String password;
private Date dateCreated;
private Date lastUpdated;
public Patient() {
}
public Patient(DiabetesType diabetesType, Language language, String customId, String firstName, String email, Date dob, String gender, String theme, String userName, String password, Date lastUpdated) {
this.diabetesType = diabetesType;
this.language = language;
this.customId = customId;
this.firstName = firstName;
this.email = email;
this.dob = dob;
this.gender = gender;
this.theme = theme;
this.userName = userName;
this.password = password;
this.lastUpdated = lastUpdated;
}
public Patient(DiabetesType diabetesType, Language language, String customId, String diabetesOther, String firstName, String lastName, String email, Date dob, String parentEmail, String gender, Date diagnosedDate, Double height, Double weight, String heightUnit, String weightUnit, String theme, String userName, String password, Date dateCreated, Date lastUpdated) {
this.diabetesType = diabetesType;
this.language = language;
this.customId = customId;
this.diabetesOther = diabetesOther;
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
this.dob = dob;
this.parentEmail = parentEmail;
this.gender = gender;
this.diagnosedDate = diagnosedDate;
this.height = height;
this.weight = weight;
this.heightUnit = heightUnit;
this.weightUnit = weightUnit;
this.theme = theme;
this.userName = userName;
this.password = password;
this.dateCreated = dateCreated;
this.lastUpdated = lastUpdated;
}
public Integer getIdpatient() {
return this.idpatient;
}
public void setIdpatient(Integer idpatient) {
this.idpatient = idpatient;
}
public DiabetesType getDiabetesType() {
return this.diabetesType;
}
public void setDiabetesType(DiabetesType diabetesType) {
this.diabetesType = diabetesType;
}
public Language getLanguage() {
return this.language;
}
public void setLanguage(Language language) {
this.language = language;
}
public String getCustomId() {
return this.customId;
}
public void setCustomId(String customId) {
this.customId = customId;
}
public String getDiabetesOther() {
return this.diabetesOther;
}
public void setDiabetesOther(String diabetesOther) {
this.diabetesOther = diabetesOther;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getDob() {
return this.dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public String getParentEmail() {
return this.parentEmail;
}
public void setParentEmail(String parentEmail) {
this.parentEmail = parentEmail;
}
public String getGender() {
return this.gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Date getDiagnosedDate() {
return this.diagnosedDate;
}
public void setDiagnosedDate(Date diagnosedDate) {
this.diagnosedDate = diagnosedDate;
}
public Double getHeight() {
return this.height;
}
public void setHeight(Double height) {
this.height = height;
}
public Double getWeight() {
return this.weight;
}
public void setWeight(Double weight) {
this.weight = weight;
}
public String getHeightUnit() {
return this.heightUnit;
}
public void setHeightUnit(String heightUnit) {
this.heightUnit = heightUnit;
}
public String getWeightUnit() {
return this.weightUnit;
}
public void setWeightUnit(String weightUnit) {
this.weightUnit = weightUnit;
}
public String getTheme() {
return this.theme;
}
public void setTheme(String theme) {
this.theme = theme;
}
public String getUserName() {
return this.userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getDateCreated() {
return this.dateCreated;
}
public void setDateCreated(Date dateCreated) {
this.dateCreated = dateCreated;
}
public Date getLastUpdated() {
return this.lastUpdated;
}
public void setLastUpdated(Date lastUpdated) {
this.lastUpdated = lastUpdated;
}
}
好的，所以当我调用这个REST方法时，我得到的是JSON输出。
{
"idpatient": 86,
"diabetesType": null,
"language": null,
"customId": "CUS790",
"diabetesOther": null,
"firstName": "Nirodha",
"lastName": "Wije",
"email": "ni00@gmail.com",
"dob": "2005-10-16",
"parentEmail": "niaasa500@gmail.com",
"gender": "male",
"diagnosedDate": "2016-11-16",
"height": 0,
"weight": 0,
"heightUnit": null,
"weightUnit": null,
"theme": "Lite",
"userName": "ranja",
"password": "N1YL3+M0lnORHnKk0dPN8HYd1IBhWKAGO9Qsop7POgw=",
"dateCreated": 1479311638000,
"lastUpdated": 1479311638000
}
现在，我从我的android应用程序连接上面的方法，我使用Retrofit来处理REST API工作。以下是相关的android代码......
private Patient restcallGetPatient(int idPatient){
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(Date.class, new DateTypeDeserializer());
Gson gson = gsonBuilder.create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(RestCommon.URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
PatientEndPoint endPoint = retrofit.create(PatientEndPoint.class);
Call<Patient> call = endPoint.findPatientById(idPatient);
call.enqueue(new Callback<Patient>() {
@Override
public void onResponse(Response<Patient> response, Retrofit retrofit) {
patients=response.body();
Log.d("PROFILE_USER"," PATIENT_DETAILS "+patients.getFirstName());
}
@Override
public void onFailure(Throwable t) {
t.printStackTrace();
Log.d("PROFILE_USER"," PATIENT_ERROR "+t.getMessage());
}
});
return patients;
}
我正在使用特定的GSON转换器来转换我从REST调用中获取的Date和TimeStamp个对象。我在上面的Retrofit代码中使用过它。它在下面。
public class DateTypeDeserializer implements JsonDeserializer<Date> {
private String[] DATE_FORMATS = new String[]{
"yyyy-MM-dd'T'HH:mm:ssZ",
"yyyy-MM-dd'T'HH:mm:ss",
"yyyy-MM-dd",
"EEE MMM dd HH:mm:ss z yyyy",
"HH:mm:ss",
"MM/dd/yyyy HH:mm:ss aaa",
"yyyy-MM-dd'T'HH:mm:ss.SSSSSS",
"yyyy-MM-dd'T'HH:mm:ss.SSSSSSS",
"yyyy-MM-dd'T'HH:mm:ss.SSSSSSS'Z'",
"MMM d',' yyyy H:mm:ss a"
};
@Override
public Date deserialize(JsonElement jsonElement, Type typeOF, JsonDeserializationContext context) throws JsonParseException {
for (String format : DATE_FORMATS) {
try {
return new SimpleDateFormat(format, Locale.US).parse(jsonElement.getAsString());
} catch (ParseException e) {
}
}
throw new JsonParseException("Unparseable date: \"" + jsonElement.getAsString()
+ "\". Supported formats: \n" + Arrays.toString(DATE_FORMATS));
}
}
现在，当我执行这个Android代码时，我得到以下异常。
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: com.google.gson.JsonParseException: Unparseable date: "1479317839000". Supported formats:
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: [yyyy-MM-dd'T'HH:mm:ssZ, yyyy-MM-dd'T'HH:mm:ss, yyyy-MM-dd, EEE MMM dd HH:mm:ss z yyyy, HH:mm:ss, MM/dd/yyyy HH:mm:ss aaa, yyyy-MM-dd'T'HH:mm:ss.SSSSSS, yyyy-MM-dd'T'HH:mm:ss.SSSSSSS, yyyy-MM-dd'T'HH:mm:ss.SSSSSSS'Z', MMM d',' yyyy H:mm:ss a]
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at xxx.com.au.xyz.activities.ProfileUserActivity$DateTypeDeserializer.deserialize(ProfileUserActivity.java:474)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at xxx.com.au.xyz.activities.ProfileUserActivity$DateTypeDeserializer.deserialize(ProfileUserActivity.java:451)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:103)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:196)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.google.gson.Gson.fromJson(Gson.java:810)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.google.gson.Gson.fromJson(Gson.java:775)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at retrofit.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:36)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at retrofit.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:24)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at retrofit.OkHttpCall.parseResponse(OkHttpCall.java:148)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at retrofit.OkHttpCall.access$100(OkHttpCall.java:29)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at retrofit.OkHttpCall$1.onResponse(OkHttpCall.java:94)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:168)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
11-16 17:37:42.033 6534-6534/xxx.com.au.xyz W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
11-16 17:37:42.043 6534-6534/xxx.com.au.xyz W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
11-16 17:37:42.043 6534-6534/xxx.com.au.xyz W/System.err: at java.lang.Thread.run(Thread.java:818)
11-16 17:37:42.043 6534-6534/xxx.com.au.xyz D/PROFILE_USER: PATIENT_ERROR Unparseable date: "1479317839000". Supported formats:
[yyyy-MM-dd'T'HH:mm:ssZ, yyyy-MM-dd'T'HH:mm:ss, yyyy-MM-dd, EEE MMM dd HH:mm:ss z yyyy, HH:mm:ss, MM/dd/yyyy HH:mm:ss aaa, yyyy-MM-dd'T'HH:mm:ss.SSSSSS, yyyy-MM-dd'T'HH:mm:ss.SSSSSSS, yyyy-MM-dd'T'HH:mm:ss.SSSSSSS'Z', MMM d',' yyyy H:mm:ss a]
11-16 17:37:42.053 6534-6534/xxx.com.au.xyz I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@b3857a0 time:13147437
好了，现在有非常重要的事情需要注意。他们在下面。
lastUpdated bean中的dateCreated和Patient在数据库中是Timestamp。在NetBeans中，我为Hibernate执行了自动POJO生成，并在bean中创建了java.util.Date。 dob是数据库和bean中的Date对象。
我正在使用Mysql数据库。
因此，由于上述异常，我无法使用Android应用程序中的REST调用从数据库中检索bean。我很确定这是由于其余调用返回的两种date格式，但应该处理，这就是我应用自定义GSON转换器的原因。但没有用，我得到了同样的例外。我研究了许多解决方案，这些解决方案建议以各种方式构建自定义GSON转换器，但仍然没有好处。
我该如何解决这个问题？
答案 0 :(得分：0)
您可以尝试将JSON值转换为Long，并在方法new Date(valueAsLong)中所有日期格式失败后返回deserialize()：
取代
throw new JsonParseException("Unparseable date: \"" + jsonElement.getAsString()
+ "\". Supported formats: \n" + Arrays.toString(DATE_FORMATS));
写
try {
return new Date(jsonElement.getAsLong());
} catch (ClassCastException e) {
throw new JsonParseException("Unparseable date: \"" + jsonElement.getAsString()
+ "\". Supported formats: \n" + Arrays.toString(DATE_FORMATS));
}
但我认为问题出在服务器端。它不应该以毫秒为单位返回日期。
答案 1 :(得分：0)
尝试将实际日期放入日期格式化程序中：
Timestamp stamp = new Timestamp(jsonElement.getAsString());
Date date = new Date(stamp.getTime());
然后在此行中使用date：
return new SimpleDateFormat(format, Locale.US).parse(date);