楚江erp：样品反馈单导出功能开发（支持PDF）

@@ -35,6 +35,9 @@ import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import javax.validation.Valid;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.InputStream;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
@@ -113,7 +116,7 @@ public class SampleResultFeedbackController extends DefaultBaseController {
      */
     @ApiOperation("规格变更打印")
     @GetMapping("/export")
-    public void export(@NotBlank(message = "id不能为空") String id, @NotBlank(message = "导出类型不能为空") String exportType
+    public void export(@NotBlank(message = "id不能为空") String id, String exportType
             , HttpServletResponse response) {
         SampleResultFeedback data = sampleResultFeedbackService.findById(id);
         if (data == null) {
@@ -123,7 +126,6 @@ public class SampleResultFeedbackController extends DefaultBaseController {
         try (InputStream inputStream = templateResource.getStream();
              Workbook workbook = new XSSFWorkbook(inputStream)) {
             Sheet sheet = workbook.getSheetAt(0);
-            ResponseUtil.setExcelResponseHead(response, data.getOrderNo() + "-试样结果反馈单.xlsx");
             DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
             List<SampleFeedbackTrackingDetail> detailList = data.getDetailList();
             // ========== 起始行：5==========
@@ -174,8 +176,25 @@ public class SampleResultFeedbackController extends DefaultBaseController {
 
             ExcelUtil.processTemplate(workbook, dataMap);
             if ("PDF".equals(exportType)) {
+                ResponseUtil.setPDFResponseHead(response, data.getOrderNo() + "-试样结果反馈单.xlsx");
                 // 输出为PDF文档
+                // === 写入临时 .xls 文件 ===
+                File tempExcel = File.createTempFile("sample_feedback_" + data.getOrderNo(), ".xls");
+                try (FileOutputStream fos = new FileOutputStream(tempExcel)) {
+                    workbook.write(fos);
+                }
+                File pdfFile = ExcelUtil.convertExcelToPdf(tempExcel, "/usr/bin/libreoffice --headless --convert-to pdf --outdir %s %s");
+                // === 输出 PDF 到浏览器 ===
+                try (InputStream pdfIn = new FileInputStream(pdfFile)) {
+                    byte[] buffer = new byte[8192];
+                    int len;
+                    while ((len = pdfIn.read(buffer)) != -1) {
+                        response.getOutputStream().write(buffer, 0, len);
+                    }
+                    response.getOutputStream().flush();
+                }
             } else {
+                ResponseUtil.setExcelResponseHead(response, data.getOrderNo() + "-试样结果反馈单.xlsx");
                 // 输出
                 workbook.write(response.getOutputStream());
                 response.getOutputStream().flush();

@@ -6,12 +6,15 @@ import org.apache.poi.ss.util.CellRangeAddress;
 
 import javax.swing.*;
 import java.awt.*;
+import java.io.File;
+import java.io.IOException;
 import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 @Slf4j
 public class ExcelUtil {
@@ -240,4 +243,39 @@ public class ExcelUtil {
         // 设置样式
         cell.setCellStyle(style);
     }
+
+
+    /**
+     * EXCEL转成PDF
+     *
+     * @param excelFile EXCEL文件
+     * @return          File
+     */
+    public static File convertExcelToPdf(File excelFile, String path) throws IOException, InterruptedException {
+        if (!excelFile.exists()) {
+            throw new IllegalArgumentException("Excel 文件不存在: " + excelFile.getAbsolutePath());
+        }
+        String pdfPath = excelFile.getAbsolutePath().replaceAll("\\.xls$", ".pdf");
+        File pdfFile = new File(pdfPath);
+        // 使用绝对路径 /usr/bin/libreoffice（CentOS 7 默认位置）
+        String command = String.format(
+                path,
+                excelFile.getParent(),
+                excelFile.getAbsolutePath()
+        );
+        Process process = Runtime.getRuntime().exec(command);
+        boolean finished = process.waitFor(30, TimeUnit.SECONDS); // 超时 30 秒
+        if (!finished) {
+            process.destroyForcibly();
+            throw new RuntimeException("LibreOffice 转换超时（>30秒）");
+        }
+        int exitCode = process.exitValue();
+        if (exitCode != 0) {
+            throw new RuntimeException("LibreOffice 转换失败，退出码: " + exitCode);
+        }
+        if (!pdfFile.exists()) {
+            throw new RuntimeException("PDF 未生成: " + pdfPath);
+        }
+        return pdfFile;
+    }
 }

@@ -42,4 +42,16 @@ public class ResponseUtil {
     }
 
 
+    /**
+     * 设置HTTP响应头
+     * pdf
+     */
+    public static void setPDFResponseHead(HttpServletResponse response, String fileName)  throws IOException {
+        String encodedFileName = URLEncoder.encode(fileName, "UTF-8").replaceAll("\\+", "%20");
+
+        response.setContentType("application/pdf");
+        response.setCharacterEncoding("UTF-8");
+        response.setHeader("Content-Disposition", "attachment;filename=" + encodedFileName);
+        response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
+    }
 }