#需求如下 通过前台传入id数据库查询数据,写入临时文件,再将临时文件存入,压缩包,一起打包下载。 #代码如下
/**
* 下载授权压缩包
*
* @param request
* @param response
* @throws Exception
*/
@RequestMapping(params = "downloadAuthorization")
@ResponseBody
public void downloadAuthorization(HttpServletRequest request, HttpServletResponse response, String id) throws Exception {
KeysignatureEntity t = keysignatureService.get(KeysignatureEntity.class, id);
String fileName = URLEncoder.encode(t.getUserName() + ".zip", StandardCharsets.UTF_8.toString());
response.setContentType("application/zip");
// 下面设置方法可以解决文件名乱码问题
response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"; filename*=utf-8''" + fileName);
List<File> files = new ArrayList<File>();
//公钥
File publicKeyFile = new File("publicKey.txt");
FileWriter publicKeyWriter = new FileWriter(publicKeyFile);
publicKeyWriter.write(t.getPublicKey());
files.add(publicKeyFile);
publicKeyWriter.close();
//密文
File cipherFile = new File("cipher.txt");
FileWriter cipherWriter = new FileWriter(cipherFile);
cipherWriter.write(t.getCipher());
files.add(cipherFile);
cipherWriter.close();
//说明
File instructionsFile = new File("instructions.txt");
FileWriter instructionsWriter = new FileWriter(instructionsFile);
instructionsWriter.write("用户名称:" + t.getUserName() + ";");
instructionsWriter.write("截止时间:" + t.getByTime() + ";");
instructionsWriter.write("授权模块:" + t.getAuthorizationModule() + ";");
files.add(instructionsFile);
instructionsWriter.close();
ZipOutputStream out = null;
try {
byte[] buffer = new byte[1024];
out = new ZipOutputStream(response.getOutputStream());
for (File file : files) {
FileInputStream fis = new FileInputStream(file);
out.putNextEntry(new ZipEntry(file.getName()));
int len;
//读入需要下载的文件的内容,打包到zip文件
while ((len = fis.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
out.flush();
out.closeEntry();
fis.close();
}
//输出到浏览器
OutputStream ou = out;
ou.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}