查了半天了 还是不知道怎么用Annotation来弄hashmap

Question

package com.model;import java.sql.Date;
import java.util.HashMap;import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinTable;
import javax.persistence.ManyToOne;
import javax.persistence.MapKey;
import javax.persistence.OneToMany;@Entity
public class Order_form {
private int id;
private Date buy_time;
private User user;
private HashMap<Good, Integer> form = new HashMap<Good, Integer>(); public Date getBuy_time() {
return buy_time;
} public void setBuy_time(Date buy_time) {
this.buy_time = buy_time;
}
@ManyToOne
public User getUser() {
return user;
} public void setUser(User user) {
this.user = user;
} @OneToMany(cascade=CascadeType.ALL)
    @MapKey(name="id")
    
public HashMap<Good, Integer> getForm() {
return form;
} public void setForm(HashMap<Good, Integer> form) {
this.form = form;
}
@Id
@GeneratedValue
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
}
}每次都会报错
不知道怎么配置 网上查的配置方法要么很多用不了 要么就是xml配置的
有人能帮下忙么

Answer 1

public String execute() throws Exception {
// TODO Auto-generated method stub
//初始化
goodMensager.addGood_TypeByInitialization();
try {
this.new_goods = this.goodMensager.paging_by_point(new_goods_start,
new_goods_max, "new");
this.characteristic_goods = this.goodMensager.paging_by_point(
characteristic_goods_start, characteristic_goods_max,
"characteristic");
this.promotion_goods = this.goodMensager.paging_by_promotion(
promotion_goods_start, promotion_goods_max);
this.types = this.goodMensager.getTypes();
this.publisher = this.goodMensager.getPublisher();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return SUCCESS;
}
这是我execute方法