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refactor: 导出功能支持可选字段

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caiyuchao
2025-09-15 11:20:11 +08:00
parent c6718e6866
commit 2e26104c37
1 changed files with 18 additions and 2 deletions
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20
agt-framework/agt-spring-boot-starter-excel/src/main/java/org/agt/framework/excel/core/util/ExcelUtils.java
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@@ -1,15 +1,16 @@
package org.agt.framework.excel.core.util; package org.agt.framework.excel.core.util;
import org.agt.framework.common.util.http.HttpUtils;
import org.agt.framework.excel.core.handler.SelectSheetWriteHandler;
import com.alibaba.excel.EasyExcel; import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.converters.longconverter.LongStringConverter; import com.alibaba.excel.converters.longconverter.LongStringConverter;
import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy; import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import jakarta.servlet.http.HttpServletResponse; import jakarta.servlet.http.HttpServletResponse;
import org.agt.framework.common.util.http.HttpUtils;
import org.agt.framework.excel.core.handler.SelectSheetWriteHandler;
import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartFile;
import java.io.IOException; import java.io.IOException;
import java.util.List; import java.util.List;
import java.util.Set;
/** /**
* Excel 工具类 * Excel 工具类
@@ -43,6 +44,21 @@ public class ExcelUtils {
response.setContentType("application/vnd.ms-excel;charset=UTF-8"); response.setContentType("application/vnd.ms-excel;charset=UTF-8");
} }
public static <T> void writeSelected(HttpServletResponse response, String filename, String sheetName,
Class<T> head, List<T> data, Set<String> includeColumnFieldNames) throws IOException {
// 输出 Excel
EasyExcel.write(response.getOutputStream(), head)
.autoCloseStream(false) // 不要自动关闭，交给 Servlet 自己处理
.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy()) // 基于 column 长度，自动适配。最大 255 宽度
.registerWriteHandler(new SelectSheetWriteHandler(head)) // 基于固定 sheet 实现下拉框
.registerConverter(new LongStringConverter()) // 避免 Long 类型丢失精度
.includeColumnFieldNames(includeColumnFieldNames)
.sheet(sheetName).doWrite(data);
// 设置 header 和 contentType。写在最后的原因是，避免报错时，响应 contentType 已经被修改了
response.addHeader("Content-Disposition", "attachment;filename=" + HttpUtils.encodeUtf8(filename));
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
}
public static <T> List<T> read(MultipartFile file, Class<T> head) throws IOException { public static <T> List<T> read(MultipartFile file, Class<T> head) throws IOException {
return EasyExcel.read(file.getInputStream(), head, null) return EasyExcel.read(file.getInputStream(), head, null)
.autoCloseStream(false) // 不要自动关闭，交给 Servlet 自己处理 .autoCloseStream(false) // 不要自动关闭，交给 Servlet 自己处理