feat: 自定义树形结构懒加载搜索功能

2024-08-10 17:26:08 +08:00
parent 7ce3ee5509
commit 080f8c076c
1 changed files with 103 additions and 57 deletions
@@ -6,9 +6,7 @@ import com.jero.modules.system.service.ISysDictItemService;
 import org.springframework.stereotype.Service;

 import javax.annotation.Resource;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.stream.Collectors;

@Service
@@ -18,38 +16,117 @@ public class DictTreeService {
    private ISysDictItemService dictItemService;

    public List<SysDictItem> queryTreeList(String nodeName, String dictId) {
+        // 查询所有节点
        LambdaQueryWrapper<SysDictItem> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SysDictItem::getDictId, dictId);
-        queryWrapper.eq(SysDictItem::getParentId, "0");
-        if (nodeName != null && !nodeName.isEmpty()) {
-            queryWrapper.like(SysDictItem::getItemText, nodeName);
-        }
-        List<SysDictItem> list = dictItemService.list(queryWrapper);
+        List<SysDictItem> allNodes = dictItemService.list(queryWrapper);

-        if (list.isEmpty()) {
-            return list;
+        // 通过 nodeName 过滤符合条件的节点
+        List<SysDictItem> matchedNodes = allNodes.stream()
+                .filter(node -> node.getItemText() != null && node.getItemText().contains(nodeName))
+                .collect(Collectors.toList());
+
+        if (matchedNodes.isEmpty()) {
+            return Collections.emptyList();
        }

-        List<String> dictItemIds = list.stream().map(SysDictItem::getId).collect(Collectors.toList());
-        // 判断有没有子级
-        queryWrapper.clear();
+        // 用于存储一级节点
+        Set<SysDictItem> rootNodes = new HashSet<>();
+
+        // 查找每个匹配节点的一级父节点
+        for (SysDictItem matchedNode : matchedNodes) {
+            SysDictItem currentNode = matchedNode;
+            while (currentNode != null && !currentNode.getParentId().equals("0")) {
+                // 查找当前节点的父节点
+                String parentId = currentNode.getParentId();
+                currentNode = allNodes.stream()
+                        .filter(node -> node.getId().equals(parentId))
+                        .findFirst()
+                        .orElse(null);
+            }
+            // 添加一级节点到结果集
+            if (currentNode != null) {
+                rootNodes.add(currentNode);
+            }
+        }
+
+        // 设置叶子标志的逻辑调整
+        for (SysDictItem node : rootNodes) {
+            Set<String> descendantIds = getAllDescendantIds(node.getId(), allNodes);  // 获取所有子孙节点的ID
+            boolean isLeaf = true;  // 默认设置为叶子节点
+
+            for (SysDictItem matchedNode : matchedNodes) {
+                if (descendantIds.contains(matchedNode.getId())) {
+                    isLeaf = false;
+                    break;  // 如果在子孙节点中找到匹配节点，当前根节点不是叶子节点
+                }
+            }
+            node.setLeafFlag(isLeaf);  // 设置叶子标志
+        }
+
+        return new ArrayList<>(rootNodes);
+    }
+
+
+    // 方法：获取给定节点ID的所有子孙节点ID
+    private Set<String> getAllDescendantIds(String parentId, List<SysDictItem> allNodes) {
+        Set<String> descendantIds = new HashSet<>();
+        List<SysDictItem> directChildren = allNodes.stream()
+                .filter(node -> node.getParentId().equals(parentId))
+                .collect(Collectors.toList());
+
+        for (SysDictItem child : directChildren) {
+            descendantIds.add(child.getId());
+            descendantIds.addAll(getAllDescendantIds(child.getId(), allNodes)); // 递归获取子孙节点
+        }
+
+        return descendantIds;
+    }
+
+
+    public List<SysDictItem> getChild(String dictItemId, String dictId, String nodeName) {
+        // 查询所有节点
+        LambdaQueryWrapper<SysDictItem> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SysDictItem::getDictId, dictId);
-        queryWrapper.in(SysDictItem::getParentId, dictItemIds);
-        if (nodeName != null && !nodeName.isEmpty()) {
-            queryWrapper.like(SysDictItem::getItemText, nodeName);
-        }
-        List<SysDictItem> childList = dictItemService.list(queryWrapper);
+        List<SysDictItem> allNodes = dictItemService.list(queryWrapper);

-        if (childList.isEmpty()) {
-            list.forEach(e -> e.setLeafFlag(true));
-            return list;
+        // 通过 nodeName 过滤符合条件的节点
+        List<SysDictItem> matchedNodes = allNodes.stream()
+                .filter(node -> node.getItemText() != null && node.getItemText().contains(nodeName))
+                .collect(Collectors.toList());
+
+        if (matchedNodes.isEmpty()) {
+            return Collections.emptyList();
        }
-        Map<String, List<SysDictItem>> childMap = childList.stream().collect(Collectors.groupingBy(SysDictItem::getParentId));
-        list.forEach(item -> {
-            List<SysDictItem> sysDictItems = childMap.get(item.getId());
-            item.setLeafFlag(sysDictItems == null || sysDictItems.isEmpty());
+
+        // 用于存储一级节点
+        Set<SysDictItem> rootNodes = new HashSet<>();
+
+        // 查找每个匹配节点的一级父节点
+        for (SysDictItem matchedNode : matchedNodes) {
+            SysDictItem currentNode = matchedNode;
+            while (currentNode != null && !currentNode.getParentId().equals(dictItemId)) {
+                // 查找当前节点的父节点
+                String parentId = currentNode.getParentId();
+                currentNode = allNodes.stream()
+                        .filter(node -> node.getId().equals(parentId))
+                        .findFirst()
+                        .orElse(null);
+            }
+            // 添加一级节点到结果集
+            if (currentNode != null) {
+                rootNodes.add(currentNode);
+            }
+        }
+
+        // 设置叶子标志
+        Set<String> rootNodeIds = rootNodes.stream().map(SysDictItem::getId).collect(Collectors.toSet());
+        rootNodes.forEach(node -> {
+            node.setLeafFlag(matchedNodes.stream()
+                    .noneMatch(n -> rootNodeIds.contains(n.getParentId())));
        });
-        return list;
+
+        return new ArrayList<>(rootNodes);
    }

    public List<SysDictItem> queryEcho(String selectNodeCodes, String dictId) {
@@ -58,35 +135,4 @@ public class DictTreeService {
        queryWrapper.in(SysDictItem::getItemValue, Arrays.asList(selectNodeCodes.split(",")));
        return dictItemService.list(queryWrapper);
    }
-
-    public List<SysDictItem> getChild(String dictItemId, String dictId, String nodeName) {
-        LambdaQueryWrapper<SysDictItem> queryWrapper = new LambdaQueryWrapper<>();
-        queryWrapper.eq(SysDictItem::getDictId, dictId);
-        queryWrapper.eq(SysDictItem::getParentId, dictItemId);
-        if (nodeName != null && !nodeName.isEmpty()) {
-            queryWrapper.like(SysDictItem::getItemText, nodeName);
-        }
-        List<SysDictItem> list = dictItemService.list(queryWrapper);
-
-        List<String> dictItemIds = list.stream().map(SysDictItem::getId).collect(Collectors.toList());
-        // 判断有没有子级
-        queryWrapper.clear();
-        queryWrapper.eq(SysDictItem::getDictId, dictId);
-        queryWrapper.in(SysDictItem::getParentId, dictItemIds);
-        if (nodeName != null && !nodeName.isEmpty()) {
-            queryWrapper.like(SysDictItem::getItemText, nodeName);
-        }
-        List<SysDictItem> childList = dictItemService.list(queryWrapper);
-
-        if (childList.isEmpty()) {
-            list.forEach(e -> e.setLeafFlag(true));
-            return list;
-        }
-        Map<String, List<SysDictItem>> childMap = childList.stream().collect(Collectors.groupingBy(SysDictItem::getParentId));
-        list.forEach(item -> {
-            List<SysDictItem> sysDictItems = childMap.get(item.getId());
-            item.setLeafFlag(sysDictItems == null || sysDictItems.isEmpty());
-        });
-        return list;
-    }
 }