#

Junjie

2024-04-09 f84448a10d99a0fa82e71088051e3517637edaa7

 zy-asrs-wcs/src/main/java/com/zy/asrs/wcs/utils/Utils.java

@@ -2,13 +2,87 @@


import com.zy.asrs.framework.common.Cools;
import com.zy.asrs.wcs.common.constant.Constants;

import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.function.BiConsumer;
import java.util.function.Function;

/**
 * Created by vincent on 2023/3/14
 */
public class Utils {

    /**
     * List转为树形结构
     *
     * @param data           List
     * @param parentId       顶级的parentId
     * @param parentIdMapper 获取parentId的Function
     * @param idMapper       获取id的Function
     * @param consumer       赋值children的Consumer
     * @param <T>            数据的类型
     * @param <R>            parentId的类型
     * @return List<T>
     */
    public static <T, R> List<T> toTreeData(List<T> data,
                                            R parentId,
                                            Function<? super T, ? extends R> parentIdMapper,
                                            Function<? super T, ? extends R> idMapper,
                                            BiConsumer<T, List<T>> consumer) {
        List<T> result = new ArrayList<>();
        for (T d : data) {
            R dParentId = parentIdMapper.apply(d);
            if (parentId.equals(dParentId)) {
                R dId = idMapper.apply(d);
                List<T> children = toTreeData(data, dId, parentIdMapper, idMapper, consumer);
                if(children.size() > 0) {
                    consumer.accept(d, children);
                }
                result.add(d);
            }
        }
        return result;
    }

//    public static <T> List<T> treeRemove(List<T> data, String condition,
//                                         Function<? super T, ? extends String> fetcher,
//                                         Function<T, List<T>> childrenGetter,
//                                         BiConsumer<T, List<T>> childrenSetter) {
//        List<T> result = new ArrayList<>();
//        for (T node : data) {
//            List<T> children = childrenGetter.apply(node);
//
//            if (children != null && !children.isEmpty()) {
//                List<T> newChildren = treeRemove(children, condition, fetcher, childrenGetter, childrenSetter);
//                childrenSetter.accept(node, newChildren);
//            }
//
//            if (fetcher.apply(node).contains(condition)) {
//                result.add(node);
//            }
//        }
//        return result;
//    }

    public static <T> void treeRemove(List<T> list, String condition, Function<? super T, ? extends String> fetcher, Function<T, List<T>> childrenGetter) {
        Iterator<T> iterator = list.iterator();
        while (iterator.hasNext()) {
            T next = iterator.next();
            List<T> children = childrenGetter.apply(next);
            if (children != null && !children.isEmpty()) {
                treeRemove(children, condition, fetcher, childrenGetter);
            } else {
                if (!fetcher.apply(next).contains(condition)) {
                    iterator.remove();
                }
            }
        }
    }

    /**
     * 数组倒序
@@ -221,4 +295,13 @@
        }
    }

    public static void cors(HttpServletResponse response){
        // 跨域设置
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Access-Control-Expose-Headers", Constants.TOKEN_HEADER_NAME);
    }

}