货物管理系统，GoodsGroup，GoodManage

package goods; public class Goods { private String name;// 名称 private String id;// 编号 private static int number;// 库存，静态属性，各个类对象共享 static { //类静态属性初始化 number = 0; } public Goods(String name) { this.name = name; number++;//增加货物，库存自动递增 id = "id" + number;//自动添加编号 } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getId() { return id; } public static int getNumber() { return number; } @Override public String toString() { return "货物名称:" + name + ", 货物编号:" + id + ", 货物库存:" + number; } } class GoodsGroup { private String catory;// 类别名称 private Goods[] member;// 该类别中的货物 public GoodsGroup(String catory) { this.catory = catory; if (member == null) {//未被初始化 member = new Goods[3];//创建数组 } } public void add(Goods g) { //把货物添加到类别中 int index = 0; for (; index < member.length; index++) { if (member[index] == null) { break; } } if (index < member.length) member[index] = g; else System.out.println("该类别货柜已满"); } public String getCatory() { return catory; } public Goods[] getMember() { return member; } public void setMember(Goods[] member) { this.member = member; } public void print() { for (Goods goods : member) { if (goods != null) System.out.println(goods.toString()); } } } class GoodManage { private GoodsGroup[] goodsList;//货物列表，存放货物类别和该类别中的货物 public GoodManage() { if (goodsList == null) { goodsList = new GoodsGroup[2];//创建 goodslist 对象，分配空间 } } public GoodsGroup findbyCatory(String name) {//根据货物类别查找 GoodsGroup find = null; if (goodsList != null) { for (int i = 0; i < goodsList.length; i++) {// 遍历货物 GoodsGroup tem = goodsList[i]; if (tem == null) break;//查找完毕,未找到 if (name.equals(tem.getCatory())) {//catory 中存放类别名称 find = tem;//找到该类别 break;//退出循环 } } } return find; } public Goods findbyName(String name) {//根据货物名称查找 Goods find = null; if (goodsList != null) { for (int i = 0; i < goodsList.length; i++) {//遍历货架 GoodsGroup tem = goodsList[i]; if (tem == null) break;//查找完毕 for (int j = 0; j < tem.getMember().length; j++) {//遍历 Goods good = tem.getMember()[j]; if (good == null) break;//继续下一个类别查找 if (name.equals(good.getName())) {//判断货物名称 find = good; i = goodsList.length; //触发父级别的停止循环条件 break;//退出循环 } } } } return find; } public void addGood(Goods g, String catory) {//添加一个商品到对应的类 GoodsGroup tem = findbyCatory(catory); if (tem != null)//已经存在该类别则直接添加 tem.add(g); else { int index = 0; for (; index < goodsList.length; index++) { if (goodsList[index] == null) { break; } } if (index < goodsList.length) { tem = new GoodsGroup(catory);//否则创建类别并添加货物 goodsList[index] = tem; //存放该类别 tem.add(g);//向该类别中添加货物 } else System.out.println("货柜已满"); } } public void addGoods(Goods[] g, String catory) {//添加一组商品 for (int i = 0; i < g.length; i++) { addGood(g[i], catory); } } public void show() {// 显示所有货物信息 for (GoodsGroup goodsGroup : goodsList) { if (goodsGroup != null) { System.out.println("类别：" + goodsGroup.getCatory() + "\n货物有:"); goodsGroup.print(); } } System.out.println("货物总库存" + Goods.getNumber()); } } class GoodsTest { public static void main(String[] args) { GoodManage manage = new GoodManage(); System.out.println("第一次测试"); String catory1 = "球类"; Goods g1 = new Goods("篮球"); manage.addGood(g1, catory1);//添加一件货物 manage.show(); System.out.println("************************"); System.out.println("第二次测试"); String catory2 = "水果"; Goods g2 = new Goods("苹果"); Goods g3 = new Goods("柚子"); Goods g4 = new Goods("橘子"); Goods[] list = {g2, g3, g4}; manage.addGoods(list, catory2);//添加一组货物 manage.show(); System.out.println("************************"); System.out.println("第三次测试"); Goods g5 = new Goods("橙子"); manage.addGood(g5, catory2);//添加一件货物 manage.show(); System.out.println("************************"); System.out.println("第四次测试"); String catory3 = "学习用品"; Goods g6 = new Goods("铅笔"); manage.addGood(g6, catory3);//添加一件货物 manage.show(); System.out.println("************************"); System.out.println("第五次测试,根据货物名称查找商品"); System.out.println(manage.findbyName("篮球")); System.out.println(manage.findbyName("橘子")); System.out.println(manage.findbyName("铅笔")); } }