08-22-导出进度类别列表，导入同步修改

xinnengyuan/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/utils/ExcelUtil.java

@@ -19,12 +19,14 @@ import org.dromara.common.core.utils.file.FileUtils;
 import org.dromara.common.excel.convert.ExcelBigNumberConvert;
 import org.dromara.common.excel.core.*;
 import org.dromara.common.excel.handler.DataWriteHandler;
+import org.springframework.http.HttpHeaders;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
@@ -203,6 +205,60 @@ public class ExcelUtil {
         builder.doWrite(list);
     }
 
+    /**
+     * 导出多sheet excel（增强版，解决XML安全问题）
+     *
+     * @param sheetData    多个sheet的数据
+     * @param sheetNames   多个sheet的名称
+     * @param clazz        实体类
+     * @param optionsList  级联下拉选内容列表
+     */
+    public static <T> void exportMultiSheetExcelEnhanced(List<List<T>> sheetData, List<String> sheetNames, Class<T> clazz, List<List<DropDownOptions>> optionsList,HttpServletResponse response) throws IOException {
+        resetResponse("file", response);
+        ExcelWriter excelWriter = null;
+        ServletOutputStream os = response.getOutputStream();
+
+        try {
+            // 使用SXSSFWorkbook避免内存问题，并减少XML处理复杂度
+            excelWriter = EasyExcel.write(os)
+                .head(clazz)
+                .autoCloseStream(false)
+                .registerConverter(new ExcelBigNumberConvert())
+                .build();
+
+
+            // 为每个sheet写入数据
+            for (int i = 0; i < sheetData.size(); i++) {
+                // 创建基本sheet配置
+                WriteSheet writeSheet = EasyExcel.writerSheet(i, sheetNames.get(i))
+                    .head(clazz)
+                    .build();
+
+                // 添加下拉选项（如果存在）
+                if (optionsList != null && optionsList.size() > i && optionsList.get(i) != null) {
+                    ExcelDownHandler handler = new ExcelDownHandler(optionsList.get(i));
+                    writeSheet.setCustomWriteHandlerList(
+                        Collections.singletonList(handler));
+                }
+
+                // 写入数据
+                excelWriter.write(sheetData.get(i), writeSheet);
+            }
+
+        } finally {
+            // 确保资源正确释放
+            if (excelWriter != null) {
+                try {
+                    excelWriter.finish();
+                } catch (Exception e) {
+                    // 记录日志但不中断主流程
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+
     /**
      * 单表多数据模板导出 模板格式为 {.属性}
      *
@@ -436,4 +492,7 @@ public class ExcelUtil {
         return IdUtil.fastSimpleUUID() + "_" + filename + ".xlsx";
     }
 
+
+
+
 }