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系统树构建工具类添加默认根节点，以及添加字符串类型的树型结构方法

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HuangXin 2022-02-15 01:59:14 +00:00 committed by Gitee
parent e2b786d97b
commit aea1887a41
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2 changed files with 42 additions and 0 deletions
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10
ruoyi-common/src/main/java/com/ruoyi/common/constant/Constants.java
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@ -122,5 +122,15 @@ public interface Constants {
*/ */
String SYS_DICT_KEY = "sys_dict:"; String SYS_DICT_KEY = "sys_dict:";
/**
* Long数据类型默认根节点
*/
Long LongRootId = 0L;
/**
* String数据类型默认根节点
*/
String StringRootId = "0";
} }

32
ruoyi-common/src/main/java/com/ruoyi/common/utils/TreeBuildUtils.java
View File

@ -1,9 +1,11 @@
package com.ruoyi.common.utils; package com.ruoyi.common.utils;
import cn.hutool.core.lang.Validator;
import cn.hutool.core.lang.tree.Tree; import cn.hutool.core.lang.tree.Tree;
import cn.hutool.core.lang.tree.TreeNodeConfig; import cn.hutool.core.lang.tree.TreeNodeConfig;
import cn.hutool.core.lang.tree.TreeUtil; import cn.hutool.core.lang.tree.TreeUtil;
import cn.hutool.core.lang.tree.parser.NodeParser; import cn.hutool.core.lang.tree.parser.NodeParser;
import com.ruoyi.common.constant.Constants;
import lombok.AccessLevel; import lombok.AccessLevel;
import lombok.NoArgsConstructor; import lombok.NoArgsConstructor;
@ -22,7 +24,37 @@ public class TreeBuildUtils extends TreeUtil {
*/ */
public static final TreeNodeConfig DEFAULT_CONFIG = TreeNodeConfig.DEFAULT_CONFIG.setNameKey("label"); public static final TreeNodeConfig DEFAULT_CONFIG = TreeNodeConfig.DEFAULT_CONFIG.setNameKey("label");
/**
* 构建整型类型的树型结构
* @param list 数据列表
* @param parentId 父级ID
* @param nodeParser 节点解析
* @param <T> 实体
* @return
*/
public static <T> List<Tree<Long>> build(List<T> list, Long parentId, NodeParser<T, Long> nodeParser) { public static <T> List<Tree<Long>> build(List<T> list, Long parentId, NodeParser<T, Long> nodeParser) {
// 默认设为根节点
if (Validator.isNull(parentId)) {
parentId = Constants.LongRootId;
}
return TreeUtil.build(list, parentId, DEFAULT_CONFIG, nodeParser);
}
/**
* 构建字符串类型的树型结构
* @param list 数据列表
* @param parentId 父级ID
* @param nodeParser 节点解析
* @param <T> 实体
* @return
*/
public static <T> List<Tree<String>> buildStrTree(List<T> list, String parentId, NodeParser<T, String> nodeParser) {
// 默认设为根节点
if (Validator.isEmpty(parentId)) {
parentId = Constants.StringRootId;
}
return TreeUtil.build(list, parentId, DEFAULT_CONFIG, nodeParser); return TreeUtil.build(list, parentId, DEFAULT_CONFIG, nodeParser);
} }