实现文件批量下载

src/main/java/com/fjy/spring/controller/DownLoadController.java

@@ -4,6 +4,7 @@ import com.fjy.spring.domain.TbFile;
 import com.fjy.spring.domain.TbUser;
 import com.fjy.spring.enums.ResultEnum;
 import com.fjy.spring.exception.UserException;
+import com.fjy.spring.properties.ServerProperties;
 import com.fjy.spring.service.FileService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
@@ -16,12 +17,19 @@ import javax.annotation.Resource;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.*;
+import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
 
 import static com.fjy.spring.constant.GlobalConstant.USER_SESSION_KEY;
 
 @Controller
 public class DownLoadController {
+    @Autowired
+    private ServerProperties serverProperties;//服务器配置信息
+
     @Autowired
     private FileService fileService;
 
@@ -112,4 +120,144 @@ public class DownLoadController {
         return null;
 
     }
+
+    /**
+     * 传入课程名和文件夹名称，打包下载目录下所有文件
+     * @param courseName
+     * @param folder
+     * @param response
+     */
+    @GetMapping("/download/downloadzip")
+    public void batDownload(@RequestParam(value = "courseName") String courseName,
+                            @RequestParam(value = "Folder")String folder, HttpServletResponse response){
+        //获取文件夹名称
+        String paths = serverProperties.getFilePath()+ "upload/"+courseName+"/"+folder;
+        String zipPath = serverProperties.getFilePath();
+
+        List<String> pathList = new ArrayList<String>();
+        pathList=getFileString(paths);
+        //需要压缩的文件--包括文件地址和文件名
+        String []path =(String[])pathList.toArray(new String[0]);
+        // 要生成的压缩文件地址和文件名称
+        String zipFileName=courseName+folder+".zip";
+        String desPath = zipPath+"\\"+zipFileName;
+        System.out.println("打包文件存储地址："+desPath);
+
+        File zipFile = new File(desPath);
+        ZipOutputStream zipStream = null;
+        FileInputStream zipSource = null;
+        BufferedInputStream bufferStream = null;
+        try {
+            //构造最终压缩包的输出流
+            zipStream = new ZipOutputStream(new FileOutputStream(zipFile));
+            for(int i =0;i<path.length;i++){
+                File file = new File(path[i]);
+                //将需要压缩的文件格式化为输入流
+                zipSource = new FileInputStream(file);
+                //压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样
+                ZipEntry zipEntry = new ZipEntry(file.getName());
+                //定位该压缩条目位置，开始写入文件到压缩包中
+
+                zipStream.putNextEntry(zipEntry);
+
+                //输入缓冲流
+                bufferStream = new BufferedInputStream(zipSource, 1024 * 10);
+                int read = 0;
+                //创建读写缓冲区
+                byte[] buf = new byte[1024 * 10];
+                while((read = bufferStream.read(buf, 0, 1024 * 10)) != -1)
+                {
+                    zipStream.write(buf, 0, read);
+                }
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            //关闭流
+            try {
+                if(null != bufferStream) bufferStream.close();
+                if(null != zipStream) zipStream.close();
+                if(null != zipSource) zipSource.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        //将打包好的文件输出到客户端
+        java.io.BufferedInputStream bis = null;
+        java.io.BufferedOutputStream bos = null;
+        try {
+            long fileLength = new File(desPath).length();
+            response.setContentType("application/x-msdownload;");
+            response.setHeader("Content-disposition", "attachment; filename=" + new String(zipFileName.getBytes("utf-8"), "ISO8859-1"));
+            response.setHeader("Content-Length", String.valueOf(fileLength));
+            bis = new BufferedInputStream(new FileInputStream(desPath));
+            bos = new BufferedOutputStream(response.getOutputStream());
+            byte[] buff = new byte[2048];
+            int bytesRead;
+            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
+                bos.write(buff, 0, bytesRead);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            if (bis != null)
+                try {
+                    bis.close();
+                } catch (IOException e) {
+                    // TODO Auto-generated catch block
+                    e.printStackTrace();
+                }
+            if (bos != null)
+                try {
+                    bos.close();
+                } catch (IOException e) {
+                    // TODO Auto-generated catch block
+                    e.printStackTrace();
+                }
+        }
+    }
+
+    /**
+     * 获取目录下所有文件的路径
+     * @param fileDir
+     * @return
+     */
+    public List<String> getFileString(String fileDir) {
+        List<File> fileList = new ArrayList<File>();
+        File file = new File(fileDir);
+        File[] files = file.listFiles();// 获取目录下的所有文件或文件夹
+        List<String> path = new ArrayList<String>();
+        List<String> name = new ArrayList<String>();
+        int i = 0,j=0;
+        if (files == null) {// 如果目录为空，直接退出
+            path.add("空目录");
+            return path;
+        }
+        // 遍历，目录下的所有文件
+        for (File f : files) {
+            if (f.isFile()) {
+                fileList.add(f);
+            } else if (f.isDirectory()) {
+                System.out.println(f.getAbsolutePath());
+                path.add(f.getAbsolutePath());
+                getFileString(f.getAbsolutePath());
+            }
+        }
+        for (File f1 : fileList) {
+            System.out.println(f1.getName());
+            path.add(f1.getAbsolutePath());
+            /*name[j]=f1.getName();j++;*/
+        }
+        return path;
+    }
+
+   /* public static void main(String[] args) {
+        List<String> path = new ArrayList<String>();
+        path=getFileString("F:\\JAVA Workspace\\Temp\\upload\\信息安全\\第一次作业");
+        Iterator<String> it1 = path.iterator();
+        while(it1.hasNext()){
+            System.out.println(it1.next());
+        }
+    }*/
 }

src/main/resources/application-dev.yml

@@ -6,6 +6,7 @@ server:
 serverproperties:
   port_num: 8080
   filePath: F:\JAVA Workspace\Temp\
+  zipfilePath: F:\JAVA Workspace\Temp\zip\
 spring:
   thymeleaf:
     prefix: classpath:/templates/

src/main/resources/static/js/homework.js

@@ -109,6 +109,11 @@ var Main = {
                 .catch(_ => {
                 });
         },
+        handleDownload(row) {
+            /*var url = window.location.protocol+"://"+window.location.host+":"+window.location.port+"/"*/
+            window.open(getRootPath_web()+"/download/downloadzip?courseName="
+                + row.courseName+"&Folder="+row.folder);
+        },
         handleSelect(key, keyPath) {
             console.log(key, keyPath);
         },