我一直在尝试使用我的应用程序在 Google Cloud Storage 上上传 pdf 文件，但无法执行此操作。我在网上搜索并找到了下面给出的代码，但问题是该代码在上传 txt 时很有用文件，但不是 pdf 文件。当我尝试上传 pdf 文件时，它上传成功，但当我尝试打开它时，它无法打开。我使用以下代码:
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
RequestDispatcher rd=req.getRequestDispatcher("career-registration-successfull.jsp");
RequestDispatcher rd1=req.getRequestDispatcher("career-registration-failed.jsp");
String name="";
String email="";
long whatsapp=0;
long number=0;
String query="";
int flag1=0;
int flag2=0;
isMultipart = ServletFileUpload.isMultipartContent(req);
resp.setContentType("text/html");
java.io.PrintWriter out = resp.getWriter( );
FileInputStream fileInputStream = new FileInputStream("C:\\Users\\Subhanshu Bigasia\\Desktop\\Amazon.pdf");
Storage storage = StorageOptions.getDefaultInstance().getService();
Bucket bucket=storage.get(("combucket1eduvitae7"));
ServletFileUpload sfu = new ServletFileUpload(new DiskFileItemFactory());
String targetFileStr="";
try {
List<FileItem> fileName = sfu.parseRequest(req);
for(FileItem f:fileName)
{
try {
f.write (new File("C:\\Users\\Subhanshu Bigasia\\Desktop\\Afcat.pdf"));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//targetFileStr = readFile("/Users/tkmajdt/Documents/workspace/File1POC1/" + f.getName(),Charset.defaultCharset());
targetFileStr = new String(Files.readAllBytes(Paths.get("C:\\Users\\Subhanshu Bigasia\\Desktop\\Afcat.pdf")));
}
}
catch(Exception e) {
e.printStackTrace();
}
BlobId blobId = BlobId.of("combucket1eduvitae", "my_blob_name1");
//Blob blob = bucket.create("my_blob_name1", targetFileStr.getBytes(), "text/plain");
Blob blob=bucket.create("myblob",fileInputStream, "text");
有人可以帮忙解决这个问题吗。
预先感谢您
最佳答案
我使用以下代码解决了该问题:
String name="";
String email="";
long whatsapp=0;
long number=0;
String query="";
int flag1=0;
int flag2=0;
boolean isMultipart = ServletFileUpload.isMultipartContent(req);
resp.setContentType("text/html");
java.io.PrintWriter out = resp.getWriter( );
if( !isMultipart ) {
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
out.println("<p>No file uploaded</p>");
out.println("</body>");
out.println("</html>");
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax( maxFileSize );
try {
// Parse the request to get file items.
List fileItems = upload.parseRequest(req);
// Process the uploaded file items
Iterator i = fileItems.iterator();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
while ( i.hasNext () ) {
FileItem fi = (FileItem)i.next();
if ( !fi.isFormField () ) {
// Get the uploaded file parameters
try { String fieldName = fi.getFieldName();
String fileName = fi.getName();
String contentType = fi.getContentType();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
Date date=new Date();
System.out.println(("Uploaded Filename: " + fileName + "<br>"));
flag1=1;
File f1=new File("C:\\Users\\Subhanshu Bigasia\\Desktop\\amazon2.pdf");
FileInputStream fileInputStream = (FileInputStream) fi.getInputStream();
Storage storage = StorageOptions.getDefaultInstance().getService();
Bucket bucket=storage.get(("combucket1eduvitae7"));
ServletFileUpload sfu = new ServletFileUpload(new DiskFileItemFactory());
BlobId blobId = BlobId.of("combucket1eduvitae", "my_blob_name1");
//Blob blob = bucket.create("my_blob_name1", targetFileStr.getBytes(), "application/pdf");
Blob blob=bucket.create(fileName+" "+date.toString(),fileInputStream,"application/pdf");
flag1=1;
}
catch(Exception e) {
flag1=0;
e.printStackTrace();
}
}
请注意，我已经使用了
Blob blob=bucket.create(fileName+""+date.toString(),fileInputStream,"application/pdf");而不是
Blob blob=bucket.create(fileName+""+date.toString(),fileInputStream,"text/plain");
关于java - 如何使用 Java 在 Google Cloud Storage 中插入 pdf 文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51710723/