package a1;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
public class Test {
public static void main(String[] args) {
  FileInputStream fis=null;
  //用MYSQL存一个BLOB类型存不进去，换了个longblob就好了，为什么？
  try {
   Class.forName("com.mysql.jdbc.Driver");
   String url="jdbc:MySQL://127.0.0.1:3306/test";
   String sql="insert into student1 values(?,?,?)";
   Connection con=DriverManager.getConnection(url, "root", "root");
   PreparedStatement smt=con.prepareStatement(sql);
   smt.setString(1, "S01");
   smt.setString(2, "ADMIN");
   File file=new File("d://a.jpg");
   fis=new FileInputStream(file);
   smt.setBinaryStream(3, fis, file.length());
   int i=smt.executeUpdate();
   System.out.println(i);
   smt.close();
  } catch (ClassNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   if(fis!=null){
   try {
    fis.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   }
  }
  
}
}

同求，学习学习