yxk-20260506-自定义流程表达式：

setProcessVariable可以写入主流程变量/子流程局部变量
增加了 taskId、executionId、local 字段
传 local: true 且有 taskId 时，通过 taskId 查当前 executionId
调用 runtimeService.setVariableLocal(executionId, 'subApproveUser', value)
不传 local/taskId/executionId 时，保持原来的 setVariable(processInstanceId, ...) 行为

jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/bpm/controller/ActProcessController.java

@@ -11,6 +11,8 @@ import org.apache.commons.io.IOUtils;
 import org.flowable.common.engine.api.FlowableException;
 import org.flowable.engine.RepositoryService;
 import org.flowable.engine.RuntimeService;
+import org.flowable.engine.TaskService;
+import org.flowable.task.api.Task;
 import org.jeecg.common.api.vo.Result;
 import org.jeecg.common.system.api.ISysBaseAPI;
 import org.jeecg.common.util.RedisUtil;
@@ -53,6 +55,8 @@ public class ActProcessController {
 	@Autowired
 	private RuntimeService runtimeService;
 	@Autowired
+	private TaskService taskService;
+	@Autowired
 	private ActProcessService actProcessService;
 	@Autowired
 	private IExtActProcessService extActProcessService;
@@ -87,6 +91,21 @@ public class ActProcessController {
 		if (oConvertUtils.isEmpty(dto.getVarField())) {
 			return Result.error("流程变量名不能为空");
 		}
+		if (Boolean.TRUE.equals(dto.getLocal()) || oConvertUtils.isNotEmpty(dto.getExecutionId()) || oConvertUtils.isNotEmpty(dto.getTaskId())) {
+			String executionId = dto.getExecutionId();
+			if (oConvertUtils.isEmpty(executionId) && oConvertUtils.isNotEmpty(dto.getTaskId())) {
+				Task task = taskService.createTaskQuery().taskId(dto.getTaskId()).singleResult();
+				if (task == null) {
+					return Result.error("任务ID不存在");
+				}
+				executionId = task.getExecutionId();
+			}
+			if (oConvertUtils.isEmpty(executionId)) {
+				return Result.error("执行ID不能为空");
+			}
+			runtimeService.setVariableLocal(executionId, dto.getVarField(), dto.getVarVal());
+			return Result.OK("保存成功");
+		}
 		runtimeService.setVariable(dto.getProcessInstanceId(), dto.getVarField(), dto.getVarVal());
 		return Result.OK("保存成功");
 	}

jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/bpm/dto/ProcessVariableDTO.java

@@ -13,9 +13,18 @@ public class ProcessVariableDTO implements Serializable {
     @Schema(description = "Process instance id")
     private String processInstanceId;
 
+    @Schema(description = "Task id")
+    private String taskId;
+
+    @Schema(description = "Execution id")
+    private String executionId;
+
     @Schema(description = "Process variable name")
     private String varField;
 
     @Schema(description = "Process variable value")
     private Object varVal;
+
+    @Schema(description = "Whether to save as execution local variable")
+    private Boolean local;
 }