fix：【BPM】修复多实例使用 LinkedHashSet 保持顺序

yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java

@@ -11,6 +11,7 @@ import java.util.function.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static cn.hutool.core.convert.Convert.toCollection;
 import static java.util.Arrays.asList;
 
 /**
@@ -335,4 +336,17 @@ public class CollectionUtils {
         return list.stream().filter(Objects::nonNull).flatMap(Collection::stream).collect(Collectors.toList());
     }
 
+    /**
+     * 转换为 LinkedHashSet
+     *
+     * @param <T>         元素类型
+     * @param elementType 集合中元素类型
+     * @param value       被转换的值
+     * @return {@link LinkedHashSet}
+     */
+    @SuppressWarnings("unchecked")
+    public static <T> LinkedHashSet<T> toLinkedHashSet(Class<T> elementType, Object value) {
+        return (LinkedHashSet<T>) toCollection(LinkedHashSet.class, elementType, value);
+    }
+
 }

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/candidate/strategy/form/BpmTaskCandidateFormUserStrategy.java

@@ -1,7 +1,7 @@
 package cn.iocoder.yudao.module.bpm.framework.flowable.core.candidate.strategy.form;
 
-import cn.hutool.core.convert.Convert;
 import cn.hutool.core.lang.Assert;
+import cn.iocoder.yudao.framework.common.util.collection.CollectionUtils;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.candidate.BpmTaskCandidateStrategy;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.candidate.strategy.user.BpmTaskCandidateUserStrategy;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum;
@@ -33,7 +33,7 @@ public class BpmTaskCandidateFormUserStrategy implements BpmTaskCandidateStrateg
     @Override
     public Set<Long> calculateUsersByTask(DelegateExecution execution, String param) {
         Object result = execution.getVariable(param);
-        return Convert.toSet(Long.class, result);
+        return CollectionUtils.toLinkedHashSet(Long.class, result);
     }
 
     @Override
@@ -41,7 +41,7 @@ public class BpmTaskCandidateFormUserStrategy implements BpmTaskCandidateStrateg
                                               String param, Long startUserId, String processDefinitionId,
                                               Map<String, Object> processVariables) {
         Object result = processVariables == null ? null : processVariables.get(param);
-        return Convert.toSet(Long.class, result);
+        return CollectionUtils.toLinkedHashSet(Long.class, result);
     }
 
 }

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/candidate/strategy/other/BpmTaskCandidateExpressionStrategy.java

@@ -1,6 +1,6 @@
 package cn.iocoder.yudao.module.bpm.framework.flowable.core.candidate.strategy.other;
 
-import cn.hutool.core.convert.Convert;
+import cn.iocoder.yudao.framework.common.util.collection.CollectionUtils;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.candidate.BpmTaskCandidateStrategy;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.util.FlowableUtils;
@@ -37,7 +37,7 @@ public class BpmTaskCandidateExpressionStrategy implements BpmTaskCandidateStrat
     @Override
     public Set<Long> calculateUsersByTask(DelegateExecution execution, String param) {
         Object result = FlowableUtils.getExpressionValue(execution, param);
-        return Convert.toSet(Long.class, result);
+        return CollectionUtils.toLinkedHashSet(Long.class, result);
     }
 
     @Override
@@ -46,7 +46,7 @@ public class BpmTaskCandidateExpressionStrategy implements BpmTaskCandidateStrat
         Map<String, Object> variables = processVariables == null ? new HashMap<>() : processVariables;
         try {
             Object result = FlowableUtils.getExpressionValue(variables, param);
-            return Convert.toSet(Long.class, result);
+            return CollectionUtils.toLinkedHashSet(Long.class, result);
         } catch (FlowableException ex) {
             // 预测未运行的节点时候，表达式如果包含 execution 或者不存在的流程变量会抛异常，
             log.warn("[calculateUsersByActivity][表达式({}) 变量({}) 解析报错", param, variables, ex);