在之前的基础上删除hbm.xml映射文件

之后修改实体类内容

/** *  部门的实体类 *  strategy对应的就是主键生成策略 *  GenerationType： *  01.auto:自动选择合适的策略，而且是默认值 *  02.identity：主键自增 *  03.sequence：通过序列产生主键 *  04.table：通过表来生成主键！框架依赖数据库中的表！模拟序列产生主键！ */@Entitypublic class Dept {    @Id    @GeneratedValue(strategy=GenerationType.AUTO)    private  Integer  deptNo;    private  String  deptName;    @Transient   //忽略映射属性   输出值  null    private  String  location;      //一个部门对应多个员工    @OneToMany(mappedBy="dept",cascade={CascadeType.ALL})    private  Set
     
       emps=new HashSet<>();    public Integer getDeptNo() {        return deptNo;    }    public void setDeptNo(Integer deptNo) {        this.deptNo = deptNo;    }    public String getDeptName() {        return deptName;    }    public void setDeptName(String deptName) {        this.deptName = deptName;    }    public String getLocation() {        return location;    }    public void setLocation(String location) {        this.location = location;    }    public Set
      
        getEmps() {        return emps;    }    public void setEmps(Set
       
         emps) {        this.emps = emps;    }    public Dept(Integer deptNo, String deptName, String location, Set
        
          emps) {        super();        this.deptNo = deptNo;        this.deptName = deptName;        this.location = location;        this.emps = emps;    }    public Dept() {        super();    }    @Override    public String toString() {        return "Dept [deptNo=" + deptNo + ", deptName=" + deptName                + ", location=" + location + ", emps=" + emps.size() + "]";    }                }
        
       
      
     

/** * @author 小豆腐 *员工的实体类 */@Entitypublic class Emp {@Id@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="seq_emp")@SequenceGenerator(name="seq_emp",sequenceName="sq_student_id")        private Integer empNo;     private String empName;    private String job;    @Column(name="salary")    private Double sal;    private Date hireDate;    //多个员工属于一个部门    @ManyToOne(fetch=FetchType.LAZY)    @JoinColumn(name="deptNo")    private  Dept dept;    public Integer getEmpNo() {        return empNo;    }    public void setEmpNo(Integer empNo) {        this.empNo = empNo;    }    public String getEmpName() {        return empName;    }    public void setEmpName(String empName) {        this.empName = empName;    }    public String getJob() {        return job;    }    public void setJob(String job) {        this.job = job;    }    public Double getSal() {        return sal;    }    public void setSal(Double salary) {        this.sal = salary;    }    public Date getHireDate() {        return hireDate;    }    public void setHireDate(Date hireDate) {        this.hireDate = hireDate;    }    public Dept getDept() {        return dept;    }    public void setDept(Dept dept) {        this.dept = dept;    }    public Emp(Integer empNo, String empName, String job, Double salary,            Date hireDate, Dept dept) {        super();        this.empNo = empNo;        this.empName = empName;        this.job = job;        this.sal = salary;        this.hireDate = hireDate;        this.dept = dept;    }    public Emp() {        super();    }    @Override    public String toString() {        return "Emp [empNo=" + empNo + ", empName=" + empName + ", job=" + job                + ", salary=" + sal + ", hireDate=" + hireDate + ", dept="                + dept + "]";    }}

在hibernate.cfg.xml中管理 实体类