products.java

基于Tapestry4

package com.tapestry4;

import java.util.ArrayList;
import java.util.List;

public class Products {

	private static List<Fruit> productList;
	
	public static List<Fruit> getProductList() {
		if(productList==null) {
			productList = new ArrayList<Fruit>();
			productList.add(createFruit(1, "苹果", 1.00f, 20));
			productList.add(createFruit(2, "西瓜", 0.80f, 10));
			productList.add(createFruit(3, "桔子", 1.50f, 25));
			productList.add(createFruit(4, "梨子", 2.00f, 30));
		}
		return productList;
	}
	
	public static Fruit createFruit(Integer ig, String name, float price, int mount) {
		Fruit fruit = new Fruit();
		fruit.setId(ig);
		fruit.setName(name);
		fruit.setPrice(price);
		fruit.setMount(mount);
		return fruit;
	}
	
	public static Fruit findFruitById(Integer ig) {
		if(productList == null) {
			productList = getProductList();
		}
		Fruit fruit = null;
		for(Fruit f : productList) {
			if(f.getId().intValue() == ig.intValue()) {
				fruit = f;
			}
		}
		return fruit;
	}
}