FeiGe快递系统

package com.feige.tools;

import com.feige.beans.Customer;

import java.util.Arrays;

public class CustomerData {
private static int SIZE = 10;
private static int COUNT = 0;
private static Customer[] CUSTOMERDATA = new Customer[SIZE];

// 保存用户信息
public static void save( Customer customer) {
    // 当使用量count 和数组的最大容量size相等，空间用完了，扩容为原大小的2倍
    if ( COUNT == SIZE ) {
        CUSTOMERDATA = Arrays.copyOf(CUSTOMERDATA , SIZE * 2) ;
        SIZE *= 2 ;
    }
    for (int i = 0; i < CUSTOMERDATA.length; i++) {
        if ( null == CUSTOMERDATA[i] ) {
            CUSTOMERDATA[i] = customer;
            COUNT++;
        }
    }

}

// 查询客户的信息
public static Customer get (String customerId ) {
    for( Customer c : CUSTOMERDATA ) {
        if ( customerId.equals(c.getCustomerId() ) ) {
            return c;
        }
    }
    return null;
}

// 重载查询方法
public static Customer get(String customerId , String pwd ) {
   /* for (int i = 0; i < CUSTOMERDATA.length; i++) {
        if ( customerId.equals(CUSTOMERDATA[i].getCustomerId() ) &&  pwd.equals(CUSTOMERDATA[i].getPwd() ) ) {
            return  CUSTOMERDATA[i];
        }
    }
    return null;*/
    for ( Customer c : CUSTOMERDATA ) {
        if ( customerId.equals(c.getCustomerId()) && pwd.equals(c.getPwd()) ) {
            return c;
        }
    }
    return null;
}

}