Java简单类——多对多映射

class Admin {
    private String aid ;
    private String password ;
    private Role role ;
    public Admin(String aid,String password) {
        this.aid =aid ;
        this.password = password ;
    }
    public void setRole(Role role) {
        this.role = role ;
    }
    public Role getRole() {
        return this.role ;
    }
    public String getInfo() {
        return "管理员编号：" + this.aid + "，密码：" + this.password ;
    }
}
class Role {
    private int rid ;
    private String title ;
    private Admin admins [] ;
    private Group groups [] ;
    public Role(int rid,String title) {
        this.rid = rid ;
        this.title = title ;
    }
    public void setAdmins(Admin [] admins) {
        this.admins = admins ;
    }
    public void setGroups(Group  groups[]) {
        this.groups = groups ;
    }
    public Group [] getGroups() {
        return this.groups ;
    }
    public Admin [] getAdmins() {
        return this.admins ;
    }
    public String getInfo() {
        return "角色编号：" + this.rid + "，名称：" + this.title ;
    }
}
class Group {
    private int gid ;
    private String title ;
    private Role roles [] ;
    private Action actions [] ;
    public Group(int gid,String title) {
        this.gid = gid ;
        this.title = title ;
    }
    public void setRoles(Role roles[]) {
        this.roles = roles ;
    }
    public void setActions(Action actions[]) {
        this.actions = actions ;
    }
    public Action [] getActions() {
        return this.actions ;
    }
    public Role [] getRoles() {
        return this.roles ;
    }
    public String getInfo() {
        return "权限组编号：" + this.gid + "，名称：" + this.title ; 
    }
}
class Action {
    private int aid ;
    private String title ;
    private String url ;
    private Group group ;
    public Action(int aid,String title,String url) {
        this.aid = aid ;
        this.title = title ;
        this.url = url ;
    }
    public void setGroup(Group group) {
        this.group = group ;
    }
    public Group getGroup() {
        return this.group ;
    }
    public String getInfo() {
        return "权限编号：" + this.aid + "，名称：" + this.title + "，路径：" + this.url ;
    }
}
public class TestAdmin {
    public static void main (String args[]) {
        //第一步，设置完整关系
        //1、准备出若干个对象
        Admin a1 = new Admin("admin","hello") ;
        Admin a2 = new Admin("guest","hello") ;
        Admin a3 = new Admin("jiang","hello") ;
        Role r1 = new Role(1,"系统管理员") ;
        Role r2 = new Role(2,"信息管理员") ;
        Group g1 = new Group(10,"信息管理") ;
        Group g2 = new Group(11,"用户管理") ;
        Group g3 = new Group(12,"数据管理") ;
        Group g4 = new Group(13,"接口管理") ;
        Group g5 = new Group(14,"备份管理") ;
        Action at01 = new Action(1001,"新闻发布","-") ;
        Action at02 = new Action(1002,"新闻列表","-") ;
        Action at03 = new Action(1003,"新闻审核","-") ;
        Action at04 = new Action(1004,"增加用户","-") ;
        Action at05 = new Action(1005,"用户列表","-") ;
        Action at06 = new Action(1006,"登录日志","-") ;
        Action at07 = new Action(1007,"雇员数据","-") ;
        Action at08 = new Action(1008,"部门数据","-") ;
        Action at09 = new Action(1009,"公司数据","-") ;
        Action at10 = new Action(1010,"服务传输","-") ;
        Action at11 = new Action(1011,"短信平台","-") ;
        Action at12 = new Action(1012,"全部备份","-") ;
        Action at13 = new Action(1013,"局部备份","-") ;
        //2、设置对象之间的基本关系
        //设置管理员与角色
        a1.setRole(r1) ;
        a2.setRole(r2) ;
        a3.setRole(r2) ;
        r1.setAdmins(new Admin[] {a1}) ; 
        r2.setAdmins(new Admin[] {a2,a3}) ;
        //设置角色与管理员组
        r1.setGroups(new Group[] {g1,g2,g3,g4,g5}) ;
        r2.setGroups(new Group[] {g1,g2}) ;
        g1.setRoles(new Role[] {r1,r2}) ;
        g2.setRoles(new Role[] {r1,r2}) ;
        g3.setRoles(new Role[] {r1}) ;
        g4.setRoles(new Role[] {r1}) ;
        g5.setRoles(new Role[] {r1}) ;
        //设置管理员组与权限
        g1.setActions(new Action[] {at01,at02,at03}) ;
        g2.setActions(new Action[] {at04,at05,at06}) ;
        g3.setActions(new Action[] {at07,at08,at09}) ;
        g4.setActions(new Action[] {at10,at11}) ;
        g5.setActions(new Action[] {at12,at13}) ;
        at01.setGroup(g1) ;
        at02.setGroup(g1) ;
        at03.setGroup(g1) ;
        at04.setGroup(g2) ;
        at05.setGroup(g2) ;
        at06.setGroup(g2) ;
        at07.setGroup(g3) ;
        at08.setGroup(g3) ;
        at09.setGroup(g3) ;
        at10.setGroup(g4) ;
        at11.setGroup(g4) ;
        at12.setGroup(g5) ;
        at13.setGroup(g5) ;
        //第二步：取出数据内容
        System.out.println(a1.getInfo()) ;
        System.out.println("	|-" + a1.getRole().getInfo()) ;
        for (int x = 0 ;x < a1.getRole().getGroups().length ;x ++ ){
            System.out.println("	|-" + a1.getRole().getGroups()[x].getInfo()) ;
            for (int y = 0 ;y< a1.getRole().getGroups()[x].getActions().length ;y ++ ){
                System.out.println("			|-" + a1.getRole().getGroups()[x].getActions()[y].getInfo()) ;
            }
        }
        System.out.println("-----------------------------------------------------------------") ;
        System.out.println(g2.getInfo()) ;
        for (int x = 0 ;x < g2.getRoles().length ; x ++ ){
            System.out.println("	|-" + g2.getRoles()[x].getInfo()) ;
            for (int y = 0 ;y < g2.getRoles()[x].getAdmins().length ;y ++ ){
                System.out.println("		|-" + g2.getRoles()[x].getAdmins()[y].getInfo()) ;
            }
        }
    }
}

这次使用了win7 自带的PowerShell，运行结果如下