------------------------ Chanpin_zujian.java ------------------------
package com.kucun.data.entity;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 产品组件关联类
* @author Administrator
*
*/
@Entity
@Table(name="chanpin_zujian")
@JsonSerialize(using = FullEntitySerializer.class)
public class Chanpin_zujian implements EntityBasis {
@Id
private Integer id;
// 关联到产品
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "chanpin_id")
private Chanpin chanpin;
// 关联到组件
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "zujian_id")
private Zujian zujian;
// 关联到板材
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "bancai_id")
private Bancai bancai;
private Double one_howmany;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Chanpin getChanpin() {
return chanpin;
}
public void setChanpin(Chanpin chanpin) {
this.chanpin = chanpin;
}
public Zujian getZujian() {
return zujian;
}
public void setZujian(Zujian zujian) {
this.zujian = zujian;
}
public Bancai getBancai() {
return bancai;
}
public void setBancai(Bancai bancai) {
this.bancai = bancai;
}
public Double getOne_howmany() {
return one_howmany;
}
public void setOne_howmany(Double one_howmany) {
this.one_howmany = one_howmany;
}
public Chanpin_zujian() {
super();
// TODO Auto-generated constructor stub
}
}
------------------------ Dingdan.java ------------------------
package com.kucun.data.entity;
import java.util.Date;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 订单
* @author Administrator
*
*/
@Entity
@Table(name="dingdan", uniqueConstraints = {
@UniqueConstraint(columnNames = "number")
})
@JsonSerialize(using = FullEntitySerializer.class)
public class Dingdan implements EntityBasis{
@Id
private Integer id;
//订单号
private String number;
private Date xiadan;
private Date jiaohuo;
@OneToMany(
mappedBy = "dingdan",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
orphanRemoval = true
)
private List<Dingdan_chanpin> dingdan_chanpins;
// 优化订单与订单组件关联
@OneToMany(
mappedBy = "dingdan",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
orphanRemoval = true
)
private List<Dingdan_chanpin_zujian> dingdan_chanpins_zujians;
public Date getXiadan() {
return xiadan;
}
public void setXiadan(Date xiadan) {
this.xiadan = xiadan;
}
public Date getJiaohuo() {
return jiaohuo;
}
public void setJiaohuo(Date jiaohuo) {
this.jiaohuo = jiaohuo;
}
public List<Dingdan_chanpin_zujian> getDingdan_chanpins_zujians() {
return dingdan_chanpins_zujians;
}
public void setDingdan_chanpins_zujians(List<Dingdan_chanpin_zujian> dingdan_chanpins_zujians) {
this.dingdan_chanpins_zujians = dingdan_chanpins_zujians;
}
public List<Dingdan_chanpin> getDingdan_chanpins() {
return dingdan_chanpins;
}
public void setDingdan_chanpins(List<Dingdan_chanpin> dingdan_chanpins) {
this.dingdan_chanpins = dingdan_chanpins;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public Dingdan(Integer id, String number) {
super();
this.id = id;
this.number = number;
}
public Dingdan() {
super();
// TODO Auto-generated constructor stub
}
}
------------------------ Dingdan_chanpin.java ------------------------
package com.kucun.data.entity;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 订单和产品关联
* @author Administrator
*
*/
@Entity
@Table(name="dingdan_chanpin")
@JsonSerialize(using = FullEntitySerializer.class)
public class Dingdan_chanpin implements EntityBasis {
@Id
private Integer id;
//产品信息
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "dingdan_id") // 指
private Dingdan dingdan;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "chanpin_id") // 指
private Chanpin chanpin;
private Integer shuliang;//产品数量;
public Chanpin getChanpin() {
return chanpin;
}
public void setChanpin(Chanpin chanpin) {
this.chanpin = chanpin;
}
public Integer getShuliang() {
return shuliang;
}
public void setShuliang(Integer shuliang) {
this.shuliang = shuliang;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Dingdan getDingdan() {
return dingdan;
}
public void setDingdan(Dingdan dingdan) {
this.dingdan = dingdan;
}
public Chanpin getChanping() {
return chanpin;
}
public void setChanping(Chanpin chanping) {
this.chanpin = chanping;
}
}
------------------------ Dingdan_chanpin_zujian.java ------------------------
package com.kucun.data.entity;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 一个订单中的产品组件订购板材数量
* @author Administrator
*
*/
@Entity
@JsonSerialize(using = FullEntitySerializer.class)
public class Dingdan_chanpin_zujian implements EntityBasis{
@Id
private Integer id;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "dingdan_id") // 指定外键列
private Dingdan dingdan;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "chanpin_zujian_id") // 指定外键列
private Chanpin_zujian zujian; // 修改为单数形式
//板材
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "bancai_id")
private Bancai bancai;
//订购数
private Integer shuliang ;
public Dingdan_chanpin_zujian() {
super();
// TODO Auto-generated constructor stub
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Dingdan getDingdan() {
return dingdan;
}
public void setDingdan(Dingdan dingdan) {
this.dingdan = dingdan;
}
public Bancai getBancai() {
return bancai;
}
public void setBancai(Bancai bancai) {
this.bancai = bancai;
}
public Chanpin_zujian getZujian() {
return zujian;
}
public void setZujian(Chanpin_zujian zujian) {
this.zujian = zujian;
}
public Integer getShuliang() {
return shuliang;
}
public void setShuliang(Integer shuliang) {
this.shuliang = shuliang;
}
}
------------------------ EntityBasis.java ------------------------
package com.kucun.data.entity;
public interface EntityBasis {
Integer getId();
void setId(Integer id);
}
------------------------ Information.java ------------------------
package com.kucun.data.entity;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* 通信类
* @author Administrator
*
*/
public class Information {
private static final ObjectMapper mapper = new ObjectMapper();
private Integer Status ;
private String text;
private Object data;
public Integer getStatus() {
return Status;
}
public void setStatus(Integer status) {
Status = status;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public Information(Integer status, String text, Object data) {
super();
Status = status;
this.text = text;
this.data = data;
}
@SuppressWarnings({"unchecked","rawtypes"})
public Information(Integer status, String text, String data, Class T) throws Exception {
super();
Status = status;
this.text = text;
this.data = fromJson(data,T);
}
public Information() {
super();
// TODO Auto-generated constructor stub
}
public String DataJson() throws JsonProcessingException {
// Java对象转JSON
return mapper.writeValueAsString(this);
}
@SuppressWarnings("unchecked")
public <T> T fromJson(String json, Class<T> clazz) throws Exception {
data= mapper.readValue(json, clazz);
return (T) data;
}
public static Information NewSuccess(Object data) {
return new Information(200, "success", data);
}
public static Information NewSuccess(String data) {
return new Information(200, "success", data);
}
public static Information Newfail(Integer status,String text,Object data) {
return new Information(status, "success", data);
}
public static Information NewFail(int i, String string) {
// TODO Auto-generated method stub
return new Information(i,string,null);
}
public static Information NewFail( String string) {
// TODO Auto-generated method stub
return new Information(400,string,null);
}
}
------------------------ Jinhuo.java ------------------------
package com.kucun.data.entity;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
@Entity
@JsonSerialize(using = FullEntitySerializer.class)
public class Jinhuo implements EntityBasis{
@Id
private Integer id;
@ManyToOne
private Dingdan dingdan;
@ManyToOne
private Chanpin chanpin;
@ManyToOne
private Zujian zujian;
@ManyToOne
private Bancai bancai;
private Integer shuliang;
private Date date;
@ManyToOne
private User user;
public Jinhuo(Integer id, Dingdan dingdan, Chanpin chanpin, Zujian zujian, Bancai bancai, Integer shuliang,
Date date, User user) {
super();
this.id = id;
this.dingdan = dingdan;
this.chanpin = chanpin;
this.zujian = zujian;
this.bancai = bancai;
this.shuliang = shuliang;
this.date = date;
this.user = user;
}
public Jinhuo() {
super();
// TODO Auto-generated constructor stub
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Dingdan getDingdan() {
return dingdan;
}
public void setDingdan(Dingdan dingdan) {
this.dingdan = dingdan;
}
public Chanpin getChanpin() {
return chanpin;
}
public void setChanpin(Chanpin chanpin) {
this.chanpin = chanpin;
}
public Zujian getZujian() {
return zujian;
}
public void setZujian(Zujian zujian) {
this.zujian = zujian;
}
public Bancai getBancai() {
return bancai;
}
public void setBancai(Bancai bancai) {
this.bancai = bancai;
}
public Integer getShuliang() {
return shuliang;
}
public void setShuliang(Integer shuliang) {
this.shuliang = shuliang;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
------------------------ Kucun.java ------------------------
package com.kucun.data.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 库存
* @author Administrator
*
*/
@Entity
@JsonSerialize(using = FullEntitySerializer.class)
public class Kucun implements EntityBasis{
@Id
private Integer id;
private Long shuliang;
@OneToOne(fetch = FetchType.LAZY) // 正确映射 Bancai 实体
@JoinColumn(name = "bancai_id", referencedColumnName = "id")
private Bancai bancai;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Bancai getBancai() {
return bancai;
}
public void setBancai(Bancai bancai) {
this.bancai = bancai;
}
public Long getShuliang() {
return shuliang;
}
public void setShuliang(Long shuliang) {
this.shuliang = shuliang;
}
public Kucun(Integer id, Bancai bancai, Long shuliang) {
super();
this.id = id;
this.bancai = bancai;
this.shuliang = shuliang;
}
public Kucun() {
super();
// TODO Auto-generated constructor stub
}
}
------------------------ Mupi.java ------------------------
package com.kucun.data.entity;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 木皮
* @author Administrator
*
*/
@Entity
@Table(name="caizhi", uniqueConstraints = {
@UniqueConstraint(columnNames = "name")
})
@JsonSerialize(using = FullEntitySerializer.class)
public class Mupi extends SimpleEntity implements EntityBasis{
/**
* 是否有油漆
*/
private Boolean you;
// 添加 OneToMany 映射
@OneToMany(mappedBy = "mupi1") // 指向 Bancai 中的 mupi1 字段
private List<Bancai> bancaisForMupi1;
@OneToMany(mappedBy = "mupi2") // 指向 Bancai 中的 mupi2 字段
private List<Bancai> bancaisForMupi2;
public List<Bancai> getBancaisForMupi1() {
return bancaisForMupi1;
}
public void setBancaisForMupi1(List<Bancai> bancaisForMupi1) {
this.bancaisForMupi1 = bancaisForMupi1;
}
public List<Bancai> getBancaisForMupi2() {
return bancaisForMupi2;
}
public void setBancaisForMupi2(List<Bancai> bancaisForMupi2) {
this.bancaisForMupi2 = bancaisForMupi2;
}
public Mupi() {
super();
}
public Boolean getYou() {
return you;
}
public void setYou(Boolean you) {
this.you = you;
}
}
------------------------ SimpleEntity.java ------------------------
package com.kucun.data.entity;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
@MappedSuperclass
public abstract class SimpleEntity implements EntityBasis{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@Column(nullable = false, unique = true)
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
// Getters and Setters...
}
------------------------ User.java ------------------------
package com.kucun.data.entity;
import java.util.Objects;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 用户
* @author Administrator
*
*/
@Entity
@Table(name="user")
@JsonSerialize(using = FullEntitySerializer.class)
public class User implements EntityBasis{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
/**
* 名字
*/
@Column(nullable=false)
private String name;
/**
* 账号
*/
@Column(nullable=false)
private String andy;
/**
* 密码
*/
@Column(nullable=false)
private String pass;
/**
* 权限
*/
@Column(nullable=false)
private int role;
public User() {
super();
}
public User(int id, String name, String andy, String pass) {
super();
this.id = id;
this.name = name;
this.andy = andy;
this.pass = pass;
}
public Integer getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAndy() {
return andy;
}
public void setAndy(String andy) {
this.andy = andy;
}
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
public int getRole() {
System.out.println(role);
return role;
}
public void setRole(int role) {
this.role = role;
}
@Override
public String toString() {
return "{id:" + id + ", name:" + name + ", andy:" + andy + ", pass:" + pass + ", role:" + role + "}";
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
User user = (User) o;
return Objects.equals(id, user.id) &&
Objects.equals(name, user.name) &&
Objects.equals(andy, user.andy)&&
Objects.equals(role, user.role); //添加所有属性比较
}
@Override
public int hashCode() {
return Objects.hash(id, name, andy,pass,role);
}
@Override
public void setId(Integer id) {
// TODO Auto-generated method stub
}
}
------------------------ Zujian.java ------------------------
package com.kucun.data.entity;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
@Entity
@JsonSerialize(using = FullEntitySerializer.class)
public class Zujian extends SimpleEntity implements EntityBasis{
// 反向关联到产品组件
@OneToMany(
mappedBy = "zujian",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY
)
private List<Chanpin_zujian> chanpins;
public List<Chanpin_zujian> getChanpins() {
return chanpins;
}
public void setChanpins(List<Chanpin_zujian> chanpins) {
this.chanpins = chanpins;
}
}
------------------------ Bancai.java ------------------------
package com.kucun.data.entity;
import java.lang.annotation.Annotation;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import com.kucun.data.entity.DTO.*;
import com.fasterxml.jackson.annotation.JsonBackReference;
import com.fasterxml.jackson.annotation.JsonManagedReference;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
/**
* 板材
* @author Administrator
*
*/
@Entity
@Table(name="bancai")
@JsonSerialize(using = FullEntitySerializer.class)
public class Bancai implements EntityBasis {
@Id
private int id;
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "caizhi_id") //
@JsonManagedReference // 标记为“主”关联方
private Caizhi caizhi;
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "mupi1_id")
private Mupi mupi1;
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "mupi2_id")
private Mupi mupi2;
private Double houdu;
@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "kucun_id", referencedColumnName = "id")
private Kucun kucun;
public Kucun getKucun() {
return kucun;
}
public void setKucun(Kucun kucun) {
this.kucun = kucun;
}
public Integer getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Caizhi getCaizhi() {
return caizhi;
}
public void setCaizhi(Caizhi caizhi) {
this.caizhi = caizhi;
}
public Mupi getMupi1() {
return mupi1;
}
public void setMupi1(Mupi mupi1) {
this.mupi1 = mupi1;
}
public Mupi getMupi2() {
return mupi2;
}
public void setMupi2(Mupi mupi2) {
this.mupi2 = mupi2;
}
public Double getHoudu() {
return houdu;
}
public void setHoudu(Double houdu) {
this.houdu = houdu;
}
public Bancai(int id, Caizhi caizhi, Mupi mupi1, Mupi mupi2, Double houdu) {
super();
this.id = id;
this.caizhi = caizhi;
this.mupi1 = mupi1;
this.mupi2 = mupi2;
this.houdu = houdu;
}
public Bancai() {
super();
}
@Override
public void setId(Integer id) {
// TODO Auto-generated method stub
}
}
------------------------ Caizhi.java ------------------------
package com.kucun.data.entity;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.FullEntitySerializer;
/**
* 板材材质
* @author Administrator
*
*/
@Entity
@Table(name="caizhi", uniqueConstraints = {
@UniqueConstraint(columnNames = "name")
})
@JsonSerialize(using = FullEntitySerializer.class)
public class Caizhi extends SimpleEntity implements EntityBasis{
@OneToMany(mappedBy="caizhi")
private List<Bancai> bancais;
public Caizhi() {
super();
}
// 添加反向关联维护方法
public void addBancai(Bancai bancai) {
bancais.add(bancai);
bancai.setCaizhi(this);
}
// 添加移除方法
public void removeBancai(Bancai bancai) {
bancais.remove(bancai);
bancai.setCaizhi(null);
}
public List<Bancai> getBancais() {
return bancais;
}
public void setBancais(List<Bancai> bancais) {
this.bancais = bancais;
}
}
------------------------ Chanpin.java ------------------------
package com.kucun.data.entity;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.kucun.data.entity.DTO.*;
/**
* 产品类
* @author Administrator
*
*/
@Entity
@Table(name="chanpin", uniqueConstraints = {
@UniqueConstraint(columnNames = "bianhao")
})
@JsonSerialize(using = FullEntitySerializer.class)
public class Chanpin implements EntityBasis {
@Id
private Integer id;
// 关联订单产品
@OneToMany(
mappedBy = "chanpin",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY
)
private List<Dingdan_chanpin> dingdans;
private String bianhao;
@OneToMany(
mappedBy = "chanpin",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
orphanRemoval = true
)
private List<Chanpin_zujian> zujians;
// 添加/移除组件的辅助方法
public void addZujian(Chanpin_zujian zujian) {
zujians.add(zujian);
zujian.setChanpin(this);
}
public void removeZujian(Chanpin_zujian zujian) {
zujians.remove(zujian);
zujian.setChanpin(null);
}
// 添加/移除组件的辅助方法
public void addDingdan(Dingdan_chanpin dingdan) {
dingdans.add(dingdan);
dingdan.setChanpin(this);
}
public void removeDingdan(Dingdan_chanpin dingdian) {
dingdans.remove(dingdian);
dingdian.setChanpin(null);
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public List<Dingdan_chanpin> getDingdans() {
return dingdans;
}
public void setDingdans(List<Dingdan_chanpin> dingdans) {
this.dingdans = dingdans;
}
public String getBianhao() {
return bianhao;
}
public void setBianhao(String bianhao) {
this.bianhao = bianhao;
}
public List<Chanpin_zujian> getZujians() {
return zujians;
}
public void setZujians(List<Chanpin_zujian> zujians) {
this.zujians = zujians;
}
public Chanpin(Integer id, List<Dingdan_chanpin> dingdians, String bianhao, List<Chanpin_zujian> zujians) {
super();
this.id = id;
this.dingdans = dingdians;
this.bianhao = bianhao;
this.zujians = zujians;
}
public Chanpin() {
super();
// TODO Auto-generated constructor stub
}
}
------------------------ FullEntitySerializer.java ------------------------
package com.kucun.data.entity.DTO;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.kucun.data.entity.EntityBasis;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.LazyInitializer;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
public class FullEntitySerializer extends JsonSerializer<Object> {
// 解包Hibernate代理对象
private Object unproxy(Object value) {
if (value instanceof HibernateProxy) {
LazyInitializer initializer = ((HibernateProxy) value).getHibernateLazyInitializer();
return initializer.getImplementation();
}
return value;
}
@Override
public void serialize(Object value, JsonGenerator gen, SerializerProvider provider) throws IOException {
// 解包代理对象
value = unproxy(value);
if (value != null && value.getClass().getName().startsWith("java.lang.reflect")) {
gen.writeNull();
return;
}
if (value instanceof List) {
handleEntityBasisList((List<?>) value, gen, provider);
} else if (value instanceof EntityBasis) {
handleSingleEntityBasis((EntityBasis) value, gen, provider);
} else {
provider.defaultSerializeValue(value, gen);
}
}
private void handleSingleEntityBasis(EntityBasis entity, JsonGenerator gen, SerializerProvider provider)
throws IOException {
// 解包代理对象
entity = (EntityBasis) unproxy(entity);
gen.writeStartObject();
List<Field> fields = getAllFields(entity.getClass());
for (Field field : fields) {
field.setAccessible(true);
String fieldName = field.getName();
if ("hibernateLazyInitializer".equals(fieldName) || "handler".equals(fieldName)) {
continue;
}
try {
Object fieldValue = field.get(entity);
// 解包字段值
fieldValue = unproxy(fieldValue);
if (fieldValue != null && fieldValue.getClass().getName().startsWith("java.lang.reflect")) {
continue;
}
if (fieldValue instanceof EntityBasis) {
Map<String, Integer> map = new HashMap<>();
map.put("id", ((EntityBasis) fieldValue).getId());
gen.writeObjectField(fieldName, map);
} else if (fieldValue instanceof List) {
handleEntityBasisListField((List<?>) fieldValue, fieldName, gen);
} else {
gen.writeFieldName(fieldName);
provider.defaultSerializeValue(fieldValue, gen);
}
} catch (IllegalAccessException e) {
gen.writeFieldName(fieldName);
gen.writeNull();
} catch (StackOverflowError e) {
gen.writeFieldName(fieldName);
gen.writeString("[Circular Reference]");
}
}
gen.writeEndObject();
}
private void handleEntityBasisList(List<?> list, JsonGenerator gen, SerializerProvider provider)
throws IOException {
gen.writeStartArray();
for (Object item : list) {
// 解包列表中的每个元素
item = unproxy(item);
if (item instanceof EntityBasis) {
handleSingleEntityBasis((EntityBasis) item, gen, provider);
} else {
provider.defaultSerializeValue(item, gen);
}
}
gen.writeEndArray();
}
private void handleEntityBasisListField(List<?> list, String fieldName, JsonGenerator gen)
throws IOException {
gen.writeFieldName(fieldName);
if (list == null || list.isEmpty()) {
gen.writeNull();
return;
}
// 解包列表中的第一个元素
Object firstItem = unproxy(list.get(0));
if (!(firstItem instanceof EntityBasis)) {
gen.writeNull();
return;
}
gen.writeStartArray();
for (Object item : list) {
// 解包列表中的每个元素
item = unproxy(item);
if (item instanceof EntityBasis) {
gen.writeStartObject();
gen.writeNumberField("id", ((EntityBasis) item).getId());
gen.writeEndObject();
}
}
gen.writeEndArray();
}
private List<Field> getAllFields(Class<?> type) {
List<Field> fields = new ArrayList<>();
Class<?> current = type;
while (current != null && current != Object.class) {
fields.addAll(Arrays.asList(current.getDeclaredFields()));
current = current.getSuperclass();
}
return fields;
}
}
添加add 板材 时报错{
"text": "创建失败: Cannot handle managed/back reference 'defaultReference': no back reference property found from type [simple type, class com.kucun.data.entity.Caizhi]\n at [Source: UNKNOWN; line: -1, column: -1]",
"data": null,
"status": 400
}
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本文探讨了在使用JPA进行对象删除时遇到的问题及原因分析，并提供了解决方案。当尝试从数据库移除对象时，若对象已处于detached状态，会导致异常。文章详细解释了detached状态的概念，并给出通过merge操作使对象状态与session同步的方法。
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