hibernate聯合主鍵註解配置

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在網上看到好多方法，結果拿來用還是出現了一些問題。現在整理一下

1、主鍵類

import javax.persistence.Column;public class UserRoleUionPK implements java.io.Serializable {    /**     *      */    private static final long serialVersionUID = 1L;    private String userId;    private String roleId;            /*public UserRoleUionPK() {        super();    }    public UserRoleUionPK(String userId, String roleId) {        this.userId = userId;        this.roleId = roleId;    }*/    @Column(name="user_id")    public String getUserId() {        return userId;    }    public void setUserId(String userId) {        this.userId = userId;    }    @Column(name="role_id")    public String getRoleId() {        return roleId;    }    public void setRoleId(String roleId) {        this.roleId = roleId;    }    /*  @Override          public boolean equals(Object o) {              if(o instanceof UserRoleUionPK){                  UserRoleUionPK key = (UserRoleUionPK)o ;                  if(this.getUserId().equals(key.getUserId()) && this.getRoleId().equals(key.getRoleId())){                      return true ;                  }              }              return false ;          }                    @Override          public int hashCode() {              return this.roleId.hashCode()+this.userId.hashCode();          }  */}

網上有的說必須重寫equals和hashcode,還有帶參構造和無參構造，其實不然，我在項目中將其注釋掉沒有發現問題。

我這邊主要注重的一點是@Column註解，之前沒有加入@Colunm一直報列名無效的問題。

entity類

import javax.persistence.EmbeddedId;import javax.persistence.Entity;import javax.persistence.Table;@Entity@Table(name = "sys_user_role")public class SysUserRole implements java.io.Serializable {    private UserRoleUionPK uionPK;    @EmbeddedId    public UserRoleUionPK getUionPK() {        return uionPK;    }    public void setUionPK(UserRoleUionPK uionPK) {        this.uionPK = uionPK;    }}

2、主鍵類

import javax.persistence.Column;public class UserRoleUionPK implements java.io.Serializable {    /**     *      */    private static final long serialVersionUID = 1L;    private String userId;    private String roleId;    @Column(name = "user_id")    public String getUserId() {        return userId;    }    public void setUserId(String userId) {        this.userId = userId;    }    @Column(name = "role_id")    public String getRoleId() {        return roleId;    }    public void setRoleId(String roleId) {        this.roleId = roleId;    }    }

entity類

import javax.persistence.Entity;import javax.persistence.Id;import javax.persistence.IdClass;import javax.persistence.Table;@Entity@Table(name = "sys_user_role")@IdClass(UserRoleUionPK.class)public class SysUserRole implements java.io.Serializable {        private String userId;    private String roleId;    @Id    public String getUserId() {        return userId;    }    public void setUserId(String userId) {        this.userId = userId;    }    @Id    public String getRoleId() {        return roleId;    }    public void setRoleId(String roleId) {        this.roleId = roleId;    }}

 

hibernate聯合主鍵註解配置