输出所有商品信息

package imooc.work2;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class GoodsManage {
    Set <Goods>goodsSet=new HashSet<Goods>();
    Iterator<Goods> it=goodsSet.iterator();
    public void imoprtGoods() {
     Goods goods1=new Goods(1000,"耳机",1000,"让声音直接进入耳朵");
     Goods goods2=new Goods(4000,"手机",1001,"人工智能的产物");
     Goods goods3=new Goods(7000,"电视",1002,"广播工具");
     goodsSet.add(goods1);
     goodsSet.add(goods2);
     goodsSet.add(goods3);
     }
    //显示所有的商品
    public void displayAllGoods() {    
       System.out.println("善品信息为：");
       if(it.hasNext()) {
        System.out.println(it.next());
       }
       
     
     }
}

package imooc.work2;

public class Goods {
   private double price;
   private String name;
   private int id;
   private String desp;
  
public Goods(double price, String name, int id, String desp) {
 
 this.price = price;
 this.name = name;
 this.id = id;
 this.desp = desp;
}
public double getPrice() {
 return price;
}
public void setPrice(double price) {
 this.price = price;
}
public String getName() {
 return name;
}
public void setName(String name) {
 this.name = name;
}
public int getId() {
 return id;
}
public void setId(int id) {
 this.id = id;
}
public String getDesp() {
 return desp;
}
public void setDesp(String desp) {
 this.desp = desp;
}
@Override
public int hashCode() {
 final int prime = 31;
 int result = 1;
 result = prime * result + ((desp == null) ? 0 : desp.hashCode());
 result = prime * result + id;
 result = prime * result + ((name == null) ? 0 : name.hashCode());
 long temp;
 temp = Double.doubleToLongBits(price);
 result = prime * result + (int) (temp ^ (temp >>> 32));
 return result;
}
@Override
public boolean equals(Object obj) {
   if(this==obj) {
    return true;
   }
   if(obj.getClass()==this.getClass()) {
    Goods goods=(Goods)obj;
   return goods.name.equals(name)&&goods.price==price&&goods.id==price&&goods.desp.equals(desp);
   }
   return false;
}
public String toString() {
 return "商品名称"+name+"价格"+price+"编号"+id+"属性"+desp;
}
}

package imooc.work2;

public class Test {

 public static void main(String[] args) {
  GoodsManage one=new GoodsManage();
  one.displayAllGoods();

 }

}

为什么只输出了一个"商品信息为"