!781 Excel模版动态数据下拉

* Excel模版动态数据下拉
* Excel模版动态数据下拉

ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/annotation/ExcelDynamicOptions.java

@@ -0,0 +1,20 @@
+package org.dromara.common.excel.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * Excel动态下拉选项注解
+ *
+ * @author Angus
+ */
+@Target({ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Inherited
+public @interface ExcelDynamicOptions {
+
+    /**
+     * 提供者类全限定名
+     * 实现org.dromara.common.excel.service.ExcelOptionsProvider实现类接口
+     */
+    Class<?> providerClass();
+}

ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/ExcelDownHandler.java

@@ -23,7 +23,9 @@ import org.dromara.common.core.utils.SpringUtils;
 import org.dromara.common.core.utils.StreamUtils;
 import org.dromara.common.core.utils.StringUtils;
 import org.dromara.common.excel.annotation.ExcelDictFormat;
+import org.dromara.common.excel.annotation.ExcelDynamicOptions;
 import org.dromara.common.excel.annotation.ExcelEnumFormat;
+import org.dromara.common.excel.service.ExcelOptionsProvider;
 
 import java.lang.reflect.Field;
 import java.util.*;
@@ -117,6 +119,18 @@ public class ExcelDownHandler implements SheetWriteHandler {
                 ExcelEnumFormat format = field.getDeclaredAnnotation(ExcelEnumFormat.class);
                 List<Object> values = EnumUtil.getFieldValues(format.enumClass(), format.textField());
                 options = StreamUtils.toList(values, Convert::toStr);
+            } else if (field.isAnnotationPresent(ExcelDynamicOptions.class)) {
+                // 处理动态下拉选项
+                ExcelDynamicOptions dynamicOptions = field.getDeclaredAnnotation(ExcelDynamicOptions.class);
+                Class<?> providerClass = dynamicOptions.providerClass();
+                if (providerClass == null) {
+                    throw new ServiceException("使用ExcelDynamicOptions注解，必须给providerClass赋予ExcelOptionsProvider的实现类" +
+                        "，字段：{}", field.getName());
+                }
+                // 获取提供者实例
+                ExcelOptionsProvider provider = (ExcelOptionsProvider) SpringUtils.getBean(providerClass);
+                Set<String> optionSets = provider.getOptions();
+                options = new ArrayList<>(CollUtil.isNotEmpty(optionSets) ? new ArrayList<>(optionSets) : Collections.emptyList());
             }
             if (ObjectUtil.isNotEmpty(options)) {
                 // 仅当下拉可选项不为空时执行

ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/service/ExcelOptionsProvider.java

@@ -0,0 +1,18 @@
+package org.dromara.common.excel.service;
+
+import java.util.Set;
+
+/**
+ * Excel下拉选项数据提供接口
+ *
+ * @author Angus
+ */
+public interface ExcelOptionsProvider {
+
+    /**
+     * 获取下拉选项数据
+     *
+     * @return 下拉选项列表
+     */
+    Set<String> getOptions();
+}