hibernate 注解联合主键映射

浏览数：30 / 时间：2015年06月09日

联合主键用Hibernate注解映射方式主要有三种：
第一、将联合主键的字段单独放在一个类中，该类需要实现java.io.Serializable接口并重写equals和hascode，再将该类注解为@Embeddable,最后在主类中(该类不包含联合主键类中的字段)保存该联合主键类的一个引用，并生成set和get方法，并将该引用注解为@Id
第二、将联合主键的字段单独放在一个类中，该类需要实现java.io.Serializable接口并重写equals和hascode，最后在主类中(该类不包含联合主键类中的字段)保存该联合主键类的一个引用，并生成set和get方法，并将该引用注解为@EmbeddedId
第三、将联合主键的字段单独放在一个类中，该类需要实现java.io.Serializable接口并要重写equals和hashcode. 最后在主类中(该类包含联合主键类中的字段)将联合主键字段都注解为@Id,并在该类上方将上这样的注解：@IdClass(联合主键类.class)

    public class BmRoRolerightmatrixPK implements Serializable{  
          
        private static final long serialVersionUID = 1L;  
          
        private Long actId;//功能操作ID  
        private Long roleId;//角色ID  
          
        @Column(name = "ACT_ID",unique = false,nullable = true,length = 10)  
        public Long getActId() {  
            return actId;  
        }  
        public void setActId(Long actId) {  
            this.actId = actId;  
        }  
          
        @Column(name = "ROLE_ID",unique = false,nullable = true,length = 10)  
        public Long getRoleId() {  
            return roleId;  
        }  
        public void setRoleId(Long roleId) {  
            this.roleId = roleId;  
        }  
          
          
    }

    @Entity  
    @IdClass(BmRoRolerightmatrixPK.class)  
    @Table(name = "BM_RO_ROLERIGHTMATRIX")  
    public class BmRoRolerightmatrix implements Serializable{  
        private static final long serialVersionUID = 1L;  
        public BmRoRolerightmatrix(){}  
        //属性  
        private Long actId;//功能操作ID  
      
        private Long roleId;//角色ID  
      
        @Id  
        public Long getActId() {  
            return this.actId;  
        }  
          
        @Id  
        public Long getRoleId() {  
            return this.roleId;  
        }  
    ...

public class WalletBalanceId implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = -6967634249077311858L;

    /***
     * CID 客户号
     */
    @ManyToOne
    @JoinColumn(name = "CID")
    private Customer customer;

    /***
     * 理财账号
     */
    @Column(name = "ACCT_NO")
    private String acctNo;

    public WalletBalanceId() {
        super();
    }

    public WalletBalanceId(Customer customer, String acctNo) {
        super();
        this.customer = customer;
        this.acctNo = acctNo;
    }

    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

    public String getAcctNo() {
        return acctNo;
    }

    public void setAcctNo(String acctNo) {
        this.acctNo = acctNo;
    }

    @Override
    public String toString() {
        return ReflectionToStringBuilder.toString(this,
                ToStringStyle.SHORT_PREFIX_STYLE);
    }
}

@Entity
@Table(name = "T_WALLET_BALANCE")
@IdClass(WalletBalanceId.class)
public class WalletBalance implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = -4041192003429561466L;

    /***
     * CID(主键) 客户号
     */
    @Id
    @ManyToOne
    @JoinColumn(name = "CID")
    private Customer customer;

    /***
     * 理财账号
     */
    @Id
    @Column(name = "ACCT_NO")
    private String acctNo;

    /***
     * 总金额
     */
    @Column(name = "TOTAL_AMT")
    private BigDecimal totalAmt;

    /***
     * 资金状态
     */
    @Column(name = "FUND_STATE")
    private String fundState;

    /***
     * 更新日期
     */
    @Column(name = "UPD_DATE")
    private Date updDate;

    public WalletBalance() {
        super();
    }

    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

    public String getAcctNo() {
        return acctNo;
    }

    public void setAcctNo(String acctNo) {
        this.acctNo = acctNo;
    }

    public BigDecimal getTotalAmt() {
        return totalAmt;
    }

    public void setTotalAmt(BigDecimal totalAmt) {
        this.totalAmt = totalAmt;
    }

    public String getFundState() {
        return fundState;
    }

    public void setFundState(String fundState) {
        this.fundState = fundState;
    }

    public Date getUpdDate() {
        return updDate;
    }

    public void setUpdDate(Date updDate) {
        this.updDate = updDate;
    }

    @Override
    public String toString() {
        return ReflectionToStringBuilder.toString(this,
                ToStringStyle.SHORT_PREFIX_STYLE);
    }
}