1、上传临时文件到服务器目录
public static List<String> uploadTempFile(HttpServletRequest request) {
List<String> fileNames = Lists.newArrayList();
Enumeration<String> params = request.getParameterNames();
String pathDir = getUploadDir(request);
File dir = new File(pathDir);
if (!dir.exists()) {
dir.mkdirs();
}
while (params.hasMoreElements()) {
String key = params.nextElement();
String fileStr = request.getParameter(key);
if (fileStr != null && !"".equals(fileStr)) {
int index = fileStr.indexOf("base64");
if (index > 0) {
try {
String fileName = UUID.randomUUID().toString();
String preStr = fileStr.substring(0, index + 7);
String prefix = preStr.substring(preStr.indexOf("/") + 1, preStr.indexOf(";")).toLowerCase();
fileStr = fileStr.substring(fileStr.indexOf(",") + 1);
BASE64Decoder decoder = new BASE64Decoder();
byte[] bb = decoder.decodeBuffer(fileStr);
for (int j = 0; j < bb.length; ++j) {
if (bb[j] < 0) {// 调整异常数据
bb[j] += 256;
}
}
String distPath = pathDir + fileName + "." + prefix;
OutputStream out = new FileOutputStream(distPath);
out.write(bb);
out.flush();
out.close();
fileNames.add(fileName + "." + prefix);
} catch (Exception e) {
log.error("上传文件异常:", e);
}
}
}
}
return fileNames;
}
2、获取上传文件临时目录
public static String getUploadDir(HttpServletRequest request) {
return request.getServletContext().getRealPath(uploadFileDir) + File.separator;
}