用java 链接mysql数据库 向其中插入jpg图像（blob） 总是出现异常

异常：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?I??(é??v?r???WYS? 4?^Ke??j¨?h?)?h??sHi’?R?U`‰ìQ?áB?-??C??xB????=??' at line 1
源码为：package lobdemo;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;public class BlobDemo1 { public static final String DBDRIVER="org.gjt.mm.mysql.Driver"; public static final String DBURL="jdbc:mysql://localhost:3306/mydatabase"; public static final String DBUSER="root"; public static final String DBPASS="mysqladmin"; public static void main(String[] args) throws Exception{ Connection conn=null; PreparedStatement pstmt = null; String name ="hello"; String sql = "INSERT INTO userblob(name,photo) VALUES(?,?)"; Class.forName(DBDRIVER); conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS); pstmt = conn.prepareStatement(sql); File f = new File("E:"+File.separator+"2.gif"); InputStream input = null; input = new FileInputStream(f); pstmt.setString(1, name); pstmt.setBinaryStream(2, input,(int)f.length()); pstmt.executeUpdate(); pstmt.close(); conn.close(); }}

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