commit

2021-11-22 10:53:47 +08:00
parent 44ce02810a
commit b6d74b3f57
2 changed files with 222 additions and 2 deletions
@@ -0,0 +1,189 @@
+package com.adc.da.slrs.ImportExcelDatas.POIUtil;
+
+
+import java.io.*;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+public class ZIPUtil {
+
+    private static final int  BUFFER_SIZE = 2 * 1024;
+
+    /**
+     * 压缩成ZIP 方法1
+     * @param srcDir 压缩文件夹路径
+     * @param out    压缩文件输出流
+     * @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;
+     *                          false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
+     * @throws RuntimeException 压缩失败会抛出运行时异常
+     */
+    public static void toZip(String srcDir, OutputStream out, boolean KeepDirStructure)
+            throws RuntimeException{
+
+//        long start = System.currentTimeMillis();
+        ZipOutputStream zos = null ;
+        try {
+            zos = new ZipOutputStream(out);
+            File sourceFile = new File(srcDir);
+            compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure);
+//            long end = System.currentTimeMillis();
+        } catch (Exception e) {
+            throw new RuntimeException("zip error from ZipUtils",e);
+        }finally{
+            if(zos != null){
+                try {
+                    zos.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+
+    }
+
+    /**
+     * 压缩成ZIP 方法2
+     * @param srcFiles 需要压缩的文件列表
+     * @param out           压缩文件输出流
+     * @throws RuntimeException 压缩失败会抛出运行时异常
+     */
+    public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {
+//        long start = System.currentTimeMillis();
+        ZipOutputStream zos = null ;
+        try {
+            zos = new ZipOutputStream(out);
+            for (File srcFile : srcFiles) {
+                byte[] buf = new byte[BUFFER_SIZE];
+                zos.putNextEntry(new ZipEntry(srcFile.getName()));
+                int len;
+                FileInputStream in = new FileInputStream(srcFile);
+                while ((len = in.read(buf)) != -1){
+                    zos.write(buf, 0, len);
+                }
+                zos.closeEntry();
+                in.close();
+            }
+//            long end = System.currentTimeMillis();
+
+        } catch (Exception e) {
+            throw new RuntimeException("zip error from ZipUtils",e);
+        }finally{
+            if(zos != null){
+                try {
+                    zos.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+
+    /**
+     * 递归压缩方法
+     * @param sourceFile 源文件
+     * @param zos        zip输出流
+     * @param name       压缩后的名称
+     * @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;
+     *                          false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
+
+     * @throws Exception
+
+     */
+
+    private static void compress(File sourceFile, ZipOutputStream zos, String name,
+
+                                 boolean KeepDirStructure) throws Exception{
+
+        byte[] buf = new byte[BUFFER_SIZE];
+
+        if(sourceFile.isFile()){
+
+            // 向zip输出流中添加一个zip实体，构造器中name为zip实体的文件的名字
+
+            zos.putNextEntry(new ZipEntry(name));
+
+            // copy文件到zip输出流中
+
+            int len;
+
+            FileInputStream in = new FileInputStream(sourceFile);
+
+            while ((len = in.read(buf)) != -1){
+
+                zos.write(buf, 0, len);
+
+            }
+
+            // Complete the entry
+
+            zos.closeEntry();
+
+            in.close();
+
+        } else {
+
+            File[] listFiles = sourceFile.listFiles();
+
+            if(listFiles == null || listFiles.length == 0){
+
+                // 需要保留原来的文件结构时,需要对空文件夹进行处理
+
+                if(KeepDirStructure){
+
+                    // 空文件夹的处理
+
+                    zos.putNextEntry(new ZipEntry(name + "/"));
+
+                    // 没有文件，不需要文件的copy
+
+                    zos.closeEntry();
+
+                }
+
+
+
+            }else {
+
+                for (File file : listFiles) {
+
+                    // 判断是否需要保留原来的文件结构
+
+                    if (KeepDirStructure) {
+
+                        // 注意：file.getName()前面需要带上父文件夹的名字加一斜杠,
+
+                        // 不然最后压缩包中就不能保留原来的文件结构,即：所有文件都跑到压缩包根目录下了
+
+                        compress(file, zos, name + "/" + file.getName(),KeepDirStructure);
+
+                    } else {
+
+                        compress(file, zos, file.getName(),KeepDirStructure);
+
+                    }
+
+
+
+                }
+
+            }
+
+        }
+
+    }
+
+    /**
+     * 根据java.nio.*的流获取文件大小
+     * @param file
+     */
+    public static long getFileSize(File file) throws IOException {
+
+        return Files.walk(file.toPath())
+                .map(f -> f.toFile())
+                .filter(f -> f.isFile())
+                .mapToLong(f -> f.length()).sum();
+    }
+}
@@ -2,6 +2,7 @@ package com.adc.da.slrs.ImportExcelDatas.controller;

 import com.adc.da.base.web.BaseController;
 import com.adc.da.common.ReadExcel;
+import com.adc.da.slrs.ImportExcelDatas.POIUtil.ZIPUtil;
 import com.adc.da.slrs.ImportExcelDatas.comment.*;
 import com.adc.da.slrs.ImportExcelDatas.entity.ImportDto;
 import com.adc.da.slrs.ImportExcelDatas.service.IImportStandExcelService;
@@ -12,15 +13,18 @@ import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;

+import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.OutputStream;
+import java.io.*;
+import java.nio.channels.FileChannel;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;

@@ -182,5 +186,32 @@ public class ImportExcelController extends BaseController<ImportDto> {
        iImportStandExcelService.importStandExcel(targetExcel,standType);
    }

+   @GetMapping("/smile")
+    public void smile(String xixi,String ohh,HttpServletResponse response) throws IOException {
+
+        if ("check".equals(ohh)){
+            File file = new File(xixi);
+            long fileSize = ZIPUtil.getFileSize(file);
+            response.setContentType("text/html;charset=UTF-8");
+            ServletOutputStream os = response.getOutputStream();
+            os.write(String.valueOf(fileSize).getBytes());
+
+        }else if("down".equals(ohh) ){
+            /** 3.设置response的header */
+
+            response.setContentType("application/zip");
+
+            response.setHeader("Content-Disposition", "attachment; filename=excel.zip");
+
+            ZIPUtil.toZip(xixi, response.getOutputStream(),true);
+        }
+
+
+
+
+
+
+   }
+

 }