Storing songs on MySQL Database (BLOb support)

问题

I am trying to store songs and lyrics on MySQl db. I googled for examples how to do this,but no help.However,i am able to store images:

  con = DriverManager.getConnection(connectionURL, "root", "");
PreparedStatement ps = con.prepareStatement("INSERT INTO image VALUES(?,?)");
 File file = new File("E://guitar.gif");
FileInputStream fs = new FileInputStream(file);
ps.setInt(1,id);
ps.setBinaryStream(2,fs,fs.available());
int i = ps.executeUpdate();
ps.close();
con.close();
//rest code

Can anyone help me how to store songs?with example?and how to retrieve it back?

回答1:

There's nothing different in storing a song than storing an image. You could add another column for the file name's, and the you can do something similar to store the files:

//..
PreparedStatement ps = con.prepareStatement("INSERT INTO data_table VALUES(?, ?, ?)");
//...
ps.setInt(1,id);
ps.setString(2, file.getName());
ps.setBinaryStream(3, fs,fs.available());
int i = ps.executeUpdate();
//...

An then to retrieve it:

PreparedStatement ps = con.prepareStatement("SELECT file_name, content from data_table where *some condition*");
ResultSet rs = ps.executeQuery();
while(rs.hasNext) {
    rs.next();
    String fileName = rs.getString("file_name");
    Blob blob = rs.getBlob("content");
    byte[] content = blob.getBytes(1, (int) blob.length());
    //now content contains the data, you ca store it in a file if you need
    OutputStream os = new FileOutputStream(new File("d:/test/" + fileName));
    os.write(content);
    os.close();
}

Don't forget exception handling!

EDIT: Another version with byte arrays: Write:

//..
PreparedStatement ps = con.prepareStatement("INSERT INTO data_table VALUES(?, ?, ?)");
//...
byte[] content = new byte[fs.available()];
ps.setInt(1,id);
ps.setString(2, file.getName());
ps.setBytes(3, content);
int i = ps.executeUpdate();
//...

Read:

PreparedStatement ps = con.prepareStatement("SELECT file_name, content from data_table where *some condition*");
ResultSet rs = ps.executeQuery();
while(rs.hasNext) {
    rs.next();
    String fileName = rs.getString("file_name");
    byte[] content = rs.getBytes("content");
    //now content contains the data, you ca store it in a file if you need
    OutputStream os = new FileOutputStream(new File("d:/test/" + fileName));
    os.write(content);
    os.close();
}

来源：https://stackoverflow.com/questions/13608866/storing-songs-on-mysql-database-blob-support

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java

mysql

database

blob