数据库无法以html格式存储

Question

I'm using springmvc , hibernate and mysql . Whenever I upload a file in my project the database doesn't save in HTML format, I want that user who uploads the file, the database should maintain the format. What should I do?

Uploading a method which controller calls during upload. Apart from code, any general idea would be appreciated.

private String getContentDescription(MultipartFile file, Long contentCategoryId) {
  StringBuffer contentDescription = new StringBuffer();
  ContentHandler textHandler = new BodyContentHandler(-1);
  InputStream input = null;
  try {
    input = file.getInputStream();
    Metadata metadata = new Metadata();
    this.parser.parse(input, textHandler, metadata, new ParseContext());
    input.close();
  } catch (IOException | SAXException | TikaException e) {
    LOGGER.debug("Unable to read uploaded document", e);
  }
  String returnString = "";
  if (null != textHandler) {
    if (contentCategoryId==3 && contentCategoryId==4) {
      String contentText = textHandler.toString();
      returnString = contentText.substring(0, Math.max(0, contentText.length()));
    } else {
      String contentText = textHandler.toString();
      returnString = contentText.substring(0, Math.min(1200, contentText.length()));
    }
  }
  return returnString;
}

Answer 1

You are using Tika to parse the HTML. BodyContentHandler will only return the HTML found within the tags and not include anything else. What you want to do is read the entire file. Try something like this:

private String getContentDescription(MultipartFile file, Long contentCategoryId) {
    try (InputStream inputStream = file.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"))) {
        StringBuilder sb = new StringBuilder();

        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line);
            sb.append('\n');
        }
        return sb.toString();
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }
    return null;
}

Answer 2

This issue should be analysed from the Application endpoint.

1. The request that you are sending to services should be UTF-8 .

2. The data should be handled as UTF-8 until you persist the data to

   DB.

3. Check your connection string that support Unicode and Character Encoding

property name="javax.persistence.jdbc.url"
value="jdbc:mysql://localhost:3306/blogdatabase?useUnicode=yes&characterEncoding=UTF-8"

4. To save the data to the database the column should be capable of storing stat particular data.To Store the UTF-8 data convert the Db column to lob or blob type.

Use the blow reference to config the JPA for the same. JPA utf-8 characters not persisted

Spring configurations Spring MVC UTF-8 Encoding

Spring multi part file upload : http://javainsimpleway.com/spring-mvc-file-upload-single-and-multiple-files-upload/