我使用不同的资源设置了一个rest webservice。
其中一个是可以通过/ api / customers
访问的客户客户类有id，地址，名称和电子邮件字段但由于某种原因，json响应如下所示：
{
"type": "customer",
"address": {
"city": "Kottes-Purk",
"country": "Pakistan",
"street": "Julius-Raab-Straße 008"
},
"email": "hana.lammert@hotmail.com",
"name": "Prof. Dr. David Mikitenko"
}
我不知道为什么json响应中有“type”字段。有人可以解释为什么会这样吗？
客户类看起来像这样：
@XmlRootElement
@Entity
@Table(name = "customers")
public class Customer extends Model {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int id;
@Column(name = "name")
private String name;
@Column(name = "email")
private String email;
@ManyToOne(fetch = FetchType.LAZY, cascade = {CascadeType.ALL})
@JoinColumn(name = "address_id")
private Address address;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "customer")
private List<Booking> bookings;
public Customer() {}
public Customer(String email, Address address, String name) {
this.email = email;
this.address = address;
this.name = name;
}
public int setId() {
return id;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
@XmlTransient
public List<Booking> getBookings() {
return bookings;
}
public void setBookings(List<Booking> bookings) {
this.bookings = bookings;
}
public static List<Customer> all() {
return (List<Customer>) Database.all(Customer.class);
}
public static Customer find(int id) {
return (Customer) Database.find(Customer.class, id);
}
public static boolean exists(int id) {
return Database.exists(Customer.class, id);
}
public static List<Customer> where(String column, String value) {
return (List<Customer>) Database.where(Customer.class, column, value);
}
}
在CustomerResource类中：
@GET
@Produces(MediaType.APPLICATION_JSON)
public List<Customer> getCustomers(){
return agencyManager.getCustomers();
}
我在这里缺少什么？谢谢
模特课：
public abstract class Model implements Serializable {
public void save() {
EntityManager entityManager = HibernateUtil.getEntityManagerFactory().createEntityManager();
entityManager.getTransaction().begin();
entityManager.persist(this);
entityManager.getTransaction().commit();
entityManager.close();
}
public void delete() {
EntityManager entityManager = HibernateUtil.getEntityManagerFactory().createEntityManager();
entityManager.getTransaction().begin();
entityManager.remove(entityManager.contains(this) ? this : entityManager.merge(this));
entityManager.getTransaction().commit();
entityManager.close();
}
}
答案 0 :(得分：1)
由于您的ID设置器ID丢失，因此应该
using System;
namespace BitConverterTest
{
class Program
{
const int iters = 1024 * 1024 * 1024;
const int arrayLen = iters / 4;
static byte[] array = new byte[arrayLen];
static void Main(string[] args)
{
//test1(1, 2, 3, 4);
//test2(1, 2, 3, 4);
test3(1, 2, 3, 4);
//test4(1, 2, 3, 4);
test5(1, 2, 3, 4);
test6(1, 2, 3, 4);
// Fill array with good PRNG data
var rng = new System.Security.Cryptography.RNGCryptoServiceProvider();
rng.GetBytes(array);
test7();
test8();
test9();
}
// BitConverter with aligned input
static void test3(byte w, byte x, byte y, byte z)
{
int res = 0;
var timer = System.Diagnostics.Stopwatch.StartNew();
var b = new byte[] { w, x, y, z };
for (int i = 0; i < iters; i++)
res = BitConverter.ToInt32(b, 0);
Console.WriteLine("test3: " + timer.Elapsed + " " + res);
}
// Inline bitfiddling with separate variables.
static void test5(byte w, byte x, byte y, byte z)
{
long res = 0;
var timer = System.Diagnostics.Stopwatch.StartNew();
var b = new byte[] { w, x, y, z };
for (int i = 0; i < iters; i++)
{
int a = w | (x << 8) | (y << 16) | (z << 24);
res += a;
}
Console.WriteLine("test5: " + timer.Elapsed + " " + res);
}
// Inline bitfiddling with array elements.
static void test6(byte w, byte x, byte y, byte z)
{
long res = 0;
var timer = System.Diagnostics.Stopwatch.StartNew();
var b = new byte[] { w, x, y, z };
for (int i = 0; i < iters; i++)
{
int a = b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24);
res += a;
}
Console.WriteLine("test6: " + timer.Elapsed + " " + res);
}
// BitConvert from large array...
static void test7()
{
var its = iters / arrayLen * 4; // *4 to remove arrayLen/4 factor.
var timer = System.Diagnostics.Stopwatch.StartNew();
long res = 0;
for (var outer = 0; outer < its; outer++)
{
for (var pos = 0; pos < arrayLen; pos += 4)
{
var x = BitConverter.ToInt32(array, pos);
res += x;
}
}
Console.WriteLine("test7: " + timer.Elapsed + " " + res);
}
// Bitfiddle from large array...
static void test8()
{
var its = iters / arrayLen * 4;
var timer = System.Diagnostics.Stopwatch.StartNew();
long res = 0;
for (var outer = 0; outer < its; outer++)
{
for (var pos = 0; pos < arrayLen; pos += 4)
{
int x = array[pos] | (array[pos + 1] << 8) | (array[pos + 2] << 16) | (array[pos + 3] << 24);
res += x;
}
}
Console.WriteLine("test8: " + timer.Elapsed + " " + res);
}
// unsafe memory operations from large array...
// (essentialy internals of BitConverter without param checks, etc)
static unsafe void test9()
{
var its = iters / arrayLen * 4;
var timer = System.Diagnostics.Stopwatch.StartNew();
long res = 0;
int value = 0;
for (var outer = 0; outer < its; outer++)
{
for (var pos = 0; pos < arrayLen; pos += 4)
{
fixed (byte* numPtr = &array[pos])
{
value = *(int*)numPtr;
}
int x = *(int*)&value;
res += x;
}
}
Console.WriteLine("test9: " + timer.Elapsed + " " + res);
}
}
}
类型'“type”：“customer”，'可能会从Model类添加到JSON。检查Model类