refactor gao module

src/main/java/com/imyeyu/api/util/BaseXSSFBuilder.java

@@ -0,0 +1,65 @@
+package com.imyeyu.api.util;
+
+import com.imyeyu.api.modules.user.bean.Gender;
+import com.imyeyu.java.TimiJava;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.Font;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+
+import java.io.IOException;
+import java.util.List;
+
+///
+///
+/// @author 夜雨
+/// @since 2026-08-04 15:57
+public abstract class BaseXSSFBuilder<T> {
+
+	public abstract byte[] build(List<T> list) throws IOException;
+
+	protected CellStyle createTitleStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+		Font font = workbook.createFont();
+		font.setBold(true);
+		font.setFontHeightInPoints((short) 14);
+		style.setFont(font);
+		return style;
+	}
+
+	protected CellStyle createHeaderStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+		Font font = workbook.createFont();
+		font.setBold(true);
+		style.setFont(font);
+		return style;
+	}
+
+	protected void appendRow(Sheet sheet, int rowIndex, CellStyle style, String... values) {
+		Row row = sheet.createRow(rowIndex);
+		for (int index = 0; index < values.length; index++) {
+			row.createCell(index).setCellValue(values[index]);
+			if (style != null) {
+				row.getCell(index).setCellStyle(style);
+			}
+		}
+	}
+
+	protected String text(Object obj) {
+		if (obj == null) {
+			return "";
+		}
+		return TimiJava.defaultIfEmpty(obj.toString(), "");
+	}
+
+	protected String gender(Gender gender) {
+		if (gender == null) {
+			return "";
+		}
+		return switch (gender) {
+			case MALE -> "男";
+			case FEMALE -> "女";
+		};
+	}
+}