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feat(增加自动创建级联选项功能):

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1.DropDownOptions中增加自动创建级联选项的方法
2.示例方法中增加调用示例
This commit is contained in:
Emil.Zhang
2023-06-09 18:31:59 +08:00
parent d785a01973
commit 0ff533e6b5
2 changed files with 86 additions and 48 deletions
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58
ruoyi-common/src/main/java/com/ruoyi/common/excel/DropDownOptions.java
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@ -10,6 +10,8 @@ import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* <h1>Excel下拉可选项</h1>
@ -88,4 +90,60 @@ public class DropDownOptions {
public static List<String> analyzeOptionValue(String option) {
return StrUtil.split(option, DELIMITER, true, true);
}
/**
* 创建级联下拉选项
*
* @param parentList 父实体可选项原始数据
* @param parentIndex 父下拉选位置
* @param sonList 子实体可选项原始数据
* @param sonIndex 子下拉选位置
* @param parentHowToGetIdFunction 父类如何获取唯一标识
* @param sonHowToGetParentIdFunction 子类如何获取父类的唯一标识
* @param howToBuildEveryOption 如何生成下拉选内容
* @return 级联下拉选项
*/
public static <T> DropDownOptions buildLinkedOptions(List<T> parentList,
int parentIndex,
List<T> sonList,
int sonIndex,
Function<T, Number> parentHowToGetIdFunction,
Function<T, Number> sonHowToGetParentIdFunction,
Function<T, String> howToBuildEveryOption) {
DropDownOptions parentLinkSonOptions = new DropDownOptions();
// 先创建父类的下拉
parentLinkSonOptions.setIndex(parentIndex);
parentLinkSonOptions.setOptions(
parentList.stream()
.map(howToBuildEveryOption)
.collect(Collectors.toList())
);
// 提取父-子级联下拉
Map<String, List<String>> sonOptions = new HashMap<>();
// 父级依据自己的ID分组
Map<Number, List<T>> parentGroupByIdMap =
parentList.stream().collect(Collectors.groupingBy(parentHowToGetIdFunction));
// 遍历每个子集，提取到Map中
sonList.forEach(everySon -> {
if (parentGroupByIdMap.containsKey(sonHowToGetParentIdFunction.apply(everySon))) {
// 找到对应的上级
T parentObj = parentGroupByIdMap.get(sonHowToGetParentIdFunction.apply(everySon)).get(0);
// 提取名称和ID作为Key
String key = howToBuildEveryOption.apply(parentObj);
// Key对应的Value
List<String> thisParentSonOptionList;
if (sonOptions.containsKey(key)) {
thisParentSonOptionList = sonOptions.get(key);
} else {
thisParentSonOptionList = new ArrayList<>();
sonOptions.put(key, thisParentSonOptionList);
}
// 往Value中添加当前子集选项
thisParentSonOptionList.add(howToBuildEveryOption.apply(everySon));
}
});
parentLinkSonOptions.setNextIndex(sonIndex);
parentLinkSonOptions.setNextOptions(sonOptions);
return parentLinkSonOptions;
}
}