压缩包: 压缩包形式批量下载文件

src/main/java/com/common/workflow/service/dto/File2ZipDto.java

@@ -0,0 +1,31 @@
+package com.common.workflow.service.dto;
+
+import java.util.List;
+
+/**
+ * @Author baiChFei
+ * @Email 738983525@qq.com
+ * @Date 2021/8/12 下午5:31
+ */
+public class File2ZipDto {
+    private String zipName;
+
+    private List<FileDto> fileUrls;
+
+    public String getZipName() {
+        return zipName;
+    }
+
+    public void setZipName(String zipName) {
+        this.zipName = zipName;
+    }
+
+    public List<FileDto> getFileUrls() {
+        return fileUrls;
+    }
+
+    public void setFileUrls(List<FileDto> fileUrls) {
+        this.fileUrls = fileUrls;
+    }
+
+}

src/main/java/com/common/workflow/service/util/File2Zip.java

@@ -7,10 +7,10 @@ import net.lingala.zip4j.model.ZipParameters;
 import net.lingala.zip4j.util.Zip4jConstants;
 
 import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.InputStream;
+import java.io.*;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 
 /**
@@ -21,13 +21,36 @@ import java.util.List;
  * @Date 2021/8/12 下午7:55
  */
 public class File2Zip {
-    public static void fileZip(List<FileDto> fileUrls, String zipName,  HttpServletResponse response) {
-        String zipUrl = "./" + zipName;
+    public static void fileZip(List<FileDto> fileUrls, String zipName,  HttpServletResponse response) throws IOException {
+        // zipName的传入格式推荐为： "文件类型" + "_" + userId
+        zipName = zipName + "_" + System.currentTimeMillis() + ".zip";
+        String zipAddr = "./" + zipName;
         for (FileDto fileDto : fileUrls) {
-            addFileZip(fileDto.getUrl(), fileDto.getName(), zipUrl);
+            addFileZip(fileDto.getUrl(), fileDto.getName(), zipAddr);
         }
 
         // 下载
+        File file = new File(zipAddr); // zip所在的路径 /**/**/zipName.zip; fileName = zipName
+        response.setCharacterEncoding("UTF-8");
+        response.setHeader("Content-Disposition",
+            "attachment; filename=" + new String(zipName.getBytes(StandardCharsets.UTF_8), "ISO8859-1"));
+        response.setContentLength((int) file.length());
+        response.setContentType("application/zip");// 定义输出类型
+        FileInputStream fis = new FileInputStream(file);
+        BufferedInputStream buff = new BufferedInputStream(fis);
+        byte[] b = new byte[4096];// 相当于我们的缓存
+        long k = 0;// 该值用于计算当前实际下载了多少字节
+        OutputStream out = response.getOutputStream();// 从response对象中得到输出流,准备下载
+        // 开始循环下载
+        while (k < file.length()) {
+            int j = buff.read(b, 0, 1024);
+            k += j;
+            out.write(b, 0, j);
+        }
+        out.flush();
+        buff.close();
+        boolean d = file.delete();
+        System.out.println("删除文件: " + d);
     }
 
     private static void addFileZip(String fileUrl, String fileName, String zipAddr) {
@@ -55,6 +78,5 @@ public class File2Zip {
                 e.printStackTrace();
             }
         }
-
     }
 }

src/main/java/com/common/workflow/web/rest/AposeResource.java

@@ -1,7 +1,7 @@
 package com.common.workflow.web.rest;
 
 import com.common.workflow.service.activiti.ActivitiService;
-import com.common.workflow.service.dto.FileDto;
+import com.common.workflow.service.dto.File2ZipDto;
 import com.common.workflow.service.util.ExcelToPdf;
 import com.common.workflow.service.util.File2Zip;
 import com.common.workflow.service.util.Word2Pdf;
@@ -44,9 +44,9 @@ public class AposeResource {
         Word2Pdf.word2PdfWithWatermark(aposeVM.getWatermark(), aposeVM.getAddressUrl(), response);
     }
 
-    @PostMapping("/zip")
-    public void Zip(@Valid @RequestBody List<FileDto> fileUrls, HttpServletResponse response) {
-        File2Zip.fileZip(fileUrls, "test.zip", response);
+    @PostMapping("/files-to-zip")
+    public void Zip(@Valid @RequestBody File2ZipDto file2ZipDto, HttpServletResponse response) throws IOException {
+        File2Zip.fileZip(file2ZipDto.getFileUrls(), file2ZipDto.getZipName(), response);
     }
 
 }