从数据库中读取2进制图片文件

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class findPicture {

public void findPicture1(String picname) throws ClassNotFoundException, SQLException, IOException {

FileOutputStream fo=new FileOutputStream("D:/"+picname+".png");

Class.forName("com.mysql.jdbc.Driver");

String url="jdbc:mysql://localhost:3306/xiezhikuai";

Connection con=DriverManager.getConnection(url, "root", "12315");

String sql="select * from jbpm4_lob where NAME_="+"\""+picname+".png\"";

Statement sta=con.createStatement();

ResultSet rs=sta.executeQuery(sql);

InputStream in=null;

if(rs.next()){

in=rs.getBinaryStream(3);

}

int i;

while ((i=in.read())!=-1) {

fo.write(i);

}

}

}