从javascript/cordova编写pdf
在我们的移动应用程序(cordova+html4)中,我们需要显示来自流的PDF。我们有一个返回pdf流的服务。我们希望将该流存储到手机的临时文件夹位置,并显示PDF。 下面的示例java代码正是我所需要的。但是如何在java脚本上实现这一功能呢?我的意思是用java脚本读取二进制流从javascript/cordova编写pdf,javascript,cordova,pdf,stream,Javascript,Cordova,Pdf,Stream,在我们的移动应用程序(cordova+html4)中,我们需要显示来自流的PDF。我们有一个返回pdf流的服务。我们希望将该流存储到手机的临时文件夹位置,并显示PDF。 下面的示例java代码正是我所需要的。但是如何在java脚本上实现这一功能呢?我的意思是用java脚本读取二进制流 String fileURL = "https://1/////4/xyz"; String saveDir = "D:/Works"; try { URL url = new URL(fileURL);
String fileURL = "https://1/////4/xyz";
String saveDir = "D:/Works";
try {
URL url = new URL(fileURL);
HttpURLConnection httpConn = (HttpURLConnection) url
.openConnection();
httpConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
httpConn.setRequestProperty("TOKEN",
"ghZtxnPfpJ63FgdT/59V+5zFTKHRdwm6rIfGJC+0B5W5CJ9pG33od7l+/L6S8R56");
int responseCode = httpConn.getResponseCode();
System.out.println("Reseponse Code = " + responseCode);
if (responseCode == HttpURLConnection.HTTP_OK) {
String fileName = "";
String disposition = httpConn
.getHeaderField("Content-Disposition");
String contentType = httpConn.getContentType();
int contentLength = httpConn.getContentLength();
if (disposition != null) {
// extracts file name from header field
int index = disposition.indexOf("filename=");
if (index > 0) {
fileName = disposition.substring(index + 10,
disposition.length() - 1);
}
} else {
// extracts file name from URL
fileName = fileURL.substring(fileURL.lastIndexOf("/") + 1,
fileURL.length());
}
System.out.println("Content-Type = " + contentType);
System.out.println("Content-Disposition = " + disposition);
System.out.println("Content-Length = " + contentLength);
System.out.println("fileName = " + fileName);
// opens input stream from the HTTP connection
InputStream inputStream = httpConn.getInputStream();
String saveFilePath = saveDir + File.separator + fileName;
// opens an output stream to save into file
FileOutputStream outputStream = new FileOutputStream(
saveFilePath);
int bytesRead = -1;
byte[] buffer = new byte[BUFFER_SIZE];
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();
System.out.println("File downloaded");
} else {
System.out
.println("No file to download. Server replied HTTP code: "
+ responseCode);
}
httpConn.disconnect();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
您可能需要查看以下两个库: 如果您试图从javascript和 如果您试图在界面中实现pdf查看器 这两个人中的一个应该能帮你