adminbo.java

此ｊａｖａ代码用以实现图书租赁系统

/**
 * 
 */
package edu.sccp.lhq.bo;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;

import edu.sccp.lhq.domain.AdminInfo;
import edu.sccp.lhq.server.AdminHashMap;
import edu.sccp.lhq.server.Tools;

/**
 * 用户业务类
 * 实现用户信息的增、删、改、查
 * @author 刘华清
 * 2007-9-4
 */
public class AdminBO {
	
	private HashMap adminHashMap = AdminHashMap.getHashMap();
	
	/*
	 * 查询全部的用户信息
	 */
    public void queryAllAdmin(){
    	Set set = adminHashMap.keySet();
    	Iterator it = set.iterator();
    	System.out.println("查询成功！");
    	System.out.println("您要查找的信息如下：");
    	
    	//遍历HashMap把所有的用户输出
    	while(it.hasNext()){
    		String s = (String)it.next();
    		AdminInfo adminInfo = (AdminInfo)adminHashMap.get(s);
    		System.out.println(adminInfo);
    	}
    }
    
    /*
     * 按用户名查询用户信息
     * return boolean
     */
    public boolean queryAdminByName(String name){
    	boolean b = false;
    	AdminInfo adminInfo = (AdminInfo)adminHashMap.get(name);
        if(adminInfo!=null){
        	b = true;
        	System.out.println("该用户信息如下：");
        	System.out.println(adminInfo);
        }else{
        	System.out.println("对不起，该用户用户不存在！");
        }
        
        return b;
    }
    
    /*
     * 添加用户信息
     * return boolean
     */
    public boolean addAdmin(String name,String password,int power){
    	boolean b = false;
    	AdminInfo admin = new AdminInfo();//产生用户对象
    	
    	//封装信息
    	admin.setUserName(name);
    	admin.setUserPassword(password);
    	admin.setUserPower(power);
    	
    	HashMap hashMap = AdminHashMap.getHashMap();
    	hashMap.put(admin.getUserName(),admin);//将封装好信息的对象放入HashMap中
    	
    	//写入文件中
    	if(Tools.writeHashMap("edu/sccp/lhq/text/adminInfo.txt", hashMap)){
    		b = true;
    	}
    	return b;
    }

    /*
     * 修改用户信息
     * return boolean
     */
	public boolean editAdmin(String name,String password,int power) {
		boolean b = false;
			
		if(delAdmin(name)){
			if(addAdmin(name,password,power)){
				b = true;
			}
		}
		
		return b;
		
	}
	
	/*
	 * 删除用户信息
	 * return boolean
	 */
	public boolean delAdmin(String name){
		boolean b = false;
		
			try{
				HashMap hashMap = AdminHashMap.getHashMap();
				hashMap.remove(name);
				if(Tools.writeHashMap("edu/sccp/lhq/text/adminInfo.txt", hashMap)){
		    		b = true;
		    	}
				
			}catch(Exception e){
				e.printStackTrace();
			}
	
		
		return b;
	}
	
	/*
	 * 检查用户是否存在
	 * return boolean
	 */
	public boolean adminExist(String name){
		boolean b = false;
    	AdminInfo adminInfo = (AdminInfo)adminHashMap.get(name);
        if(adminInfo!=null){
        	b = true;
        }
      
        return b;
	}
}