数据表与简单Java类（角色与权限）进行单独类的描述代码是什么？

Class Dept { // 部门信息

private int did ;

private String dname ;

public Dept(int did,String dname) {

 this.did = did ;

 this.dname = dname ;

}

public String getInfo() {

 return”【部门】did = “+this.did+”，名称=“+this.dname ;

}

}

class Emp { // 雇员信息

private int eid ;

private String ename ;

public Emp(int eid,String ename) {

  This.eid = eid ;

  This.ename = ename ;

}

public String getInfo() {

return “【雇员】eid = “+ this.eid + “、ename=”+this.ename ;

 }

}

class Role { //角色信息

 private int rid ;

 private String title ;

 public Role (int rid,String title)  {

     this.rid = rid ;

     this.title = title ;

 }

 public Sting getInfo() {

return”【角色】rid = “+this.rid +”、title = “ +this.title ;

 }

}

class Action { //权限，privilege

private int aid ;

private String title ;

private String flag ;

public Action (int aid,String title,String flag) {

 this.aid = aid;

 this.title = title ;

 this.flag = flag ;

}

Public String getInfo() {

 Return”【权限】aid = “ + this.aid +”、title =”this.title + “+this.flag ;

}

}