java 單個上傳檔案, 批量上傳檔案,單個下載,批量打成zip壓縮包下載檔案(如果不能接受httpsevletrequest請求的檔案可以使用MultipartFile[] files)
package net.wkang.intelligent_audit.hospitalization.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
@Configuration
public class FileUploadDownload {
/**
* 單檔案上傳
* @param file
* @return
*/
public Map<String, Object> upload(MultipartFile file){
Map<String, Object> map = new HashMap<String,Object>();
if(file==null) {
map.put("message", "沒有發現檔案!");
return map;
}
if (file.isEmpty()) {
map.put("message", "檔案不能為空!");
return map;
}
// 獲取檔名
String fileName=file.getOriginalFilename();
System.out.println("上傳的檔名為：" + fileName);
// 獲取檔案的字尾名
String suffixName = fileName.substring(fileName.lastIndexOf("."));
System.out.println("上傳的字尾名為：" + suffixName);
// 檔案上傳後的路徑
String filePath = "upload/";
// 解決中文問題，liunx下中文路徑，圖片顯示問題
// fileName = UUID.randomUUID() + suffixName;
String absolutePath = new File(filePath + fileName).getAbsolutePath();//獲取絕對路徑
map.put("path", absolutePath);
System.out.println(absolutePath);
File dest = new File(absolutePath);
// 檢測是否存在目錄
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();
}
try {
file.transferTo(dest);
map.put("message", "上傳成功");
return map;
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
map.put("message", "上傳失敗");
return map;
}
/**
* 批量上傳
* @param orderId
* */
public Map<String, Object> handleFileUpload(HttpServletRequest request, String orderId) {
Map<String, Object> map = new HashMap<String,Object>();
List<String> listFileName = new ArrayList<String>();
List<String> listFilePath = new ArrayList<String>();
System.out.println(request.getParameter("file"));
List<MultipartFile> files = ((MultipartHttpServletRequest) request)
.getFiles("file");
String realPath = "upload/"+orderId+"/";
File dest = new File(realPath + " ");
// 檢測是否存在目錄
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();
}
MultipartFile file = null;
BufferedOutputStream stream = null;
for (int i = 0; i < files.size(); ++i) {
file = files.get(i);
if (!file.isEmpty()) {
try {
byte[] bytes = file.getBytes();
stream = new BufferedOutputStream(new FileOutputStream(
new File(realPath,file.getOriginalFilename())));
listFileName.add(file.getOriginalFilename());
listFilePath.add(realPath+file.getOriginalFilename());
stream.write(bytes);
stream.close();
} catch (Exception e) {
stream = null;
map.put("message", "上傳失敗");
return map;//上傳失敗
}
} else {
map.put("message", "第"+i+"個檔案上傳失敗");
return map;
}
}
map.put("listFileName", listFileName);
map.put("listFilePath", listFilePath);
map.put("message", "上傳成功");
return map;
}
/**
* 單個下載
* @return
*/
public Map<String, Object> download(HttpServletResponse response,String fileName,String orderId){
Map<String, Object> map = new HashMap<String,Object>();
if (fileName != null) {
//檔案下載路徑，應與檔案上傳路徑一致
String realPath = "upload/"+orderId+"/";
File file = new File(realPath, fileName);
if (file.exists()) {
try {
fileName = new String(fileName.getBytes(),"ISO8859-1");//防止中文名稱亂碼
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
response.setContentType("application/force-download");// 設定強制下載不開啟
response.addHeader("Content-Disposition",
"attachment;fileName=" + fileName);// 設定檔名
byte[] buffer = new byte[1024];
FileInputStream fis = null;
BufferedInputStream bis = null;
OutputStream os = null;
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
os = response.getOutputStream();
int i = bis.read(buffer);
while (i != -1) {
os.write(buffer, 0, i);
i = bis.read(buffer);
}
map.put("message", "下載成功");
} catch (Exception e) {
e.printStackTrace();
map.put("message", "下載失敗");
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(os !=null) {
try {
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
return map;
}
/**
* 下載多檔案zip壓縮檔案
* @param response
*/
public void FileDownload(HttpServletResponse response) {
// String realPath = "upload/";
//需要壓縮的檔案--包括檔案地址和檔名
String []path ={"D:\\git\\intelligent_audit_system\\intelligent-audit-biz-hospitalization\\upload\\配置.txt",
"D:\\git\\intelligent_audit_system\\intelligent-audit-biz-hospitalization\\upload\\新建文字文件.txt"};
// 要生成的壓縮檔案地址和檔名稱
String desPath = "D:\\DownLoad.zip";
File zipFile = new File(desPath);
ZipOutputStream zipStream = null;
FileInputStream zipSource = null;
BufferedInputStream bufferStream = null;
try {
//構造最終壓縮包的輸出流
zipStream = new ZipOutputStream(new FileOutputStream(zipFile));
for(int i =0;i<path.length;i++){
File file = new File(path[i]);
//將需要壓縮的檔案格式化為輸入流
zipSource = new FileInputStream(file);
//壓縮條目不是具體獨立的檔案，而是壓縮包檔案列表中的列表項，稱為條目，就像索引一樣
ZipEntry zipEntry = new ZipEntry(file.getName());
//定位該壓縮條目位置，開始寫入檔案到壓縮包中
zipStream.putNextEntry(zipEntry);
//輸入緩衝流
bufferStream = new BufferedInputStream(zipSource, 1024 * 10);
int read = 0;
//建立讀寫緩衝區
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 {
//關閉流
try {
if(null != bufferStream) bufferStream.close();
if(null != zipStream) zipStream.close();
if(null != zipSource) zipSource.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}