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