如何使用Java和Spring MVC在SQL Server DB中上载文件

Question

I have jsp with method="post" enctype="multipart/form-data"> in form tag, Spring MVC Controller with @RequestParam CommonsMultipartFile otherDocs, and below piece of code to insert file into DB

        PreparedStatement pstmt = null;

        try {
            String fileName = fileItem.getName().substring(fileItem.getName().lastIndexOf("\\")+1, fileItem.getName().length());

            File file = new File(fileItem.getName());
            FileInputStream fis = new FileInputStream(file);

            String sql = "INSERT INTO MyTable(formId, fileType, fileName, updateTime, updateUser, content) VALUES(?, ?, ?, getDate(), ?, ?)";

            pstmt = connection.prepareStatement(sql);          

            pstmt.setInt(1, id);
            int len = (int)file.length();

            if(fileItem.getContentType().endsWith(".document")){
                pstmt.setString(2, "Document");
            }else{
                pstmt.setString(2, "else");             
            }
            pstmt.setString(3, fileName);
            pstmt.setString(4, userLoggedIn);

            //pstmt.setBytes(5, bs);<------noted
            pstmt.setBinaryStream(5, fis, len);

            int count = pstmt.executeUpdate();
        } catch (Exception e) {             
            e.printStackTrace();            
        }finally{
            try {
                pstmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

I am getting " String or binary data would be truncated. " after firing executeUpdate() only when 5th parameter is set. I have tried running the query without 5th parameter which is running fine.

I tried with commented "noted" line as well, getting the same Data Truncation error.

Thanks

Jai

Answer 1

如果将文件extern以其哈希值或类似名称保存在目录中，则将是很多更好的解决方案，在数据库中，您仅应随后保存其名称。

Answer 2

Database table's column was required to be changed from varbinary to varbianry(max). This change made my code to work :)