对ArrayList集合里面数据排序，arraylist集合排序

对ArrayList集合里面数据排序，arraylist集合排序

 先说下原因，最近项目中出现了获取网络数据混乱的情况，经过仔细查看才知道是加入集合的顺序出了问题，由于我是循环获取id，然后再循环请求数据，请求成功之后就把实体类中的数据加入到ArrayList集合中，可是我忽略了网络请求的耗时不确定，可能第二次请求的耗时小于第一次请求，这就导致加入集合的顺序不能保证，所以出现了错乱，所以，我决定在加入集合后给他们排序。

经过查阅资料得知，解决的办法有两个，一个是通过Comparator，一个是实现Comparable接口，我在这里选择了第二种，使所在的类实现Comparable接口，重写compareTo，和toString两个方法。

代码部分 ：

/**
 * Created by zhangjiaqi on 16/11/5.
 */

public class GoodsForTypeEntity implements Comparable<GoodsForTypeEntity> {

    public GoodsForTypeEntity(int id, String name) {
        this.id = id;
        this.name = name;
    }

    private int id;
    private String name;
    public int count;
    private String dishes_id;
    private String mct_id;
    private String dishes_cate_id;
    private String dishware_id;
    private String dishes_name;
    private String dishes_desc;
    private String dishes_pic;
    private String dishes_pic_list;
    private String dishes_price;
    private String deposit_price;
    private String sales_volume;
    private String is_selling;
    private String dishes_stock;
    private String ctime;
    private String utime;
    private String status;
    private String is_hot;
    private String remark;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    public String getIs_hot() {
        return is_hot;
    }

    public void setIs_hot(String is_hot) {
        this.is_hot = is_hot;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getCtime() {
        return ctime;
    }

    public void setCtime(String ctime) {
        this.ctime = ctime;
    }

    public String getUtime() {
        return utime;
    }

    public void setUtime(String utime) {
        this.utime = utime;
    }

    public String getDishes_stock() {
        return dishes_stock;
    }

    public void setDishes_stock(String dishes_stock) {
        this.dishes_stock = dishes_stock;
    }

    public String getIs_selling() {
        return is_selling;
    }

    public void setIs_selling(String is_selling) {
        this.is_selling = is_selling;
    }

    public String getDeposit_price() {
        return deposit_price;
    }

    public void setDeposit_price(String deposit_price) {
        this.deposit_price = deposit_price;
    }

    public String getSales_volume() {
        return sales_volume;
    }

    public void setSales_volume(String sales_volume) {
        this.sales_volume = sales_volume;
    }

    public String getDishes_price() {
        return dishes_price;
    }

    public void setDishes_price(String dishes_price) {
        this.dishes_price = dishes_price;
    }

    public String getDishes_pic_list() {
        return dishes_pic_list;
    }

    public void setDishes_pic_list(String dishes_pic_list) {
        this.dishes_pic_list = dishes_pic_list;
    }

    public String getDishes_pic() {
        return dishes_pic;
    }

    public void setDishes_pic(String dishes_pic) {
        this.dishes_pic = dishes_pic;
    }

    public String getDishes_desc() {
        return dishes_desc;
    }

    public void setDishes_desc(String dishes_desc) {
        this.dishes_desc = dishes_desc;
    }

    public String getDishes_name() {
        return dishes_name;
    }

    public void setDishes_name(String dishes_name) {
        this.dishes_name = dishes_name;
    }

    public String getDishware_id() {
        return dishware_id;
    }

    public void setDishware_id(String dishware_id) {
        this.dishware_id = dishware_id;
    }

    public String getDishes_cate_id() {
        return dishes_cate_id;
    }

    public void setDishes_cate_id(String dishes_cate_id) {
        this.dishes_cate_id = dishes_cate_id;
    }

    public String getMct_id() {
        return mct_id;
    }

    public void setMct_id(String mct_id) {
        this.mct_id = mct_id;
    }

    public String getDishes_id() {
        return dishes_id;
    }

    public void setDishes_id(String dishes_id) {
        this.dishes_id = dishes_id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public int compareTo(GoodsForTypeEntity goodsForTypeEntity) {//使其按照从小到大的顺序排列
        return id - goodsForTypeEntity.id;
    }

    @Override
    public String toString() {//在输入对象时按照以方式象输出
        return "GoodsForTypeEntity[id:" + id + "]";
    }

}

调用非常简单

 for (int i = 0; i < entity.getData().getDishes().size(); i++) {
                GoodsForTypeEntity goodsForTypeEntity = new GoodsForTypeEntity(typeId, typeName);
//                goodsForTypeEntity.setDishes_cate_id("" + dishes_cate_id);
                setEntityParam(goodsForTypeEntity, entity.getData().getDishes().get(i));
                goodsList.add(goodsForTypeEntity);
      

            }
        }

        Collections.sort(goodsList);//只需要这一句就可以了