java如何将图片以2进制的形式存入数据库

存入图片
import java.sql.*;
import java.io.*;
public class InsertImg
{
public static void main(String args[])
{
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:DBImg");
String sql = "insert into DBImg (image) values (?)";
PreparedStatement pstmt=con.prepareStatement(sql);
FileInputStream fi=new FileInputStream("./room.jpg");
pstmt.setBinaryStream(1,fi,fi.available());
pstmt.execute();
fi.close();
pstmt.close();
con.close();
}catch(Exception e){System.out.println(e.getMessage());}
}
}
把图片取出输出到文件
import java.io.*;
import java.sql.*;

public class ImgRead
{
public static void main(String args[])
{
try
{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
String url="jdbc:microsoft:sqlserver://BILLGATES:1433";
Connection cn=DriverManager.getConnection(url,"sa","8310");
Statement st=cn.createStatement();
String str = "select img from test where id=1";
ResultSet rs=st.executeQuery(str);
rs.next();
InputStream in=rs.getBinaryStream(1);

FileOutputStream file = new FileOutputStream("./88.mp3");
byte c[] = new byte[1024];

int r = 0;

while ((r = in.read(c)) != -1){
file.write(c,0,r);

}

file.close();
in.close();

}
catch(Exception e)
{
e.printStackTrace();
}
}
}
把图片输出到JLabel控件
import java.awt.*;
import java.applet.*;
import java.awt.image.BufferedImage;
import com.sun.image.codec.jpeg.*;
import javax.swing.*;
import java.sql.*;
import java.io.*;
public class DisplayImg
{
public DisplayImg(){
Image img=null;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:DBImg");
Statement stmt=con.createStatement();
String sql = "select image from DBImg";
ResultSet rs=stmt.executeQuery(sql);
rs.next();
InputStream in = rs.getBinaryStream(1);
JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(in);
img=decoder.decodeAsBufferedImage();
rs.close();
con.close();
}catch(Exception e){System.out.println(e.getMessage());}

JFrame f=new JFrame();
JLabel label=new JLabel();
ImageIcon icon=new ImageIcon(img);
label.setIcon(icon);
JScrollPane jsp=new JScrollPane(label);
Container content=f.getContentPane();
content.add(jsp);
f.setSize(535,400);
f.setVisible(true);

}

public static void main(String args[]){
DisplayImg di=new DisplayImg();
}
}

上面的程序数据库驱动不一致,自行修改一下.其中在Sqlserver中要存放图片的字段应选"image"类型