JDBC读取写入SQLServer的大字段数据（IMAGE）

    static String driver = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
    static String url = "jdbc:microsoft:sqlserver://192.168.0.202:1433;DatabaseName=test";
    static String user = "sa";
    static String passwd = "ps";

    public static void method() throws Exception {
        Connection conn = null;
        try {
            Class.forName(driver);
            conn = DriverManager.getConnection(url, user, passwd);
            int op = 0;
            // 插入
            if (op == 0) {
                PreparedStatement ps = conn.prepareStatement("insert into tb_file values(?,?)");
                ps.setString(1, "test.doc");
                InputStream in = new FileInputStream("d:/test.doc");
                ps.setBinaryStream(2, in, in.available());
                ps.executeUpdate();
                ps.close();
            } else {
                // 取出
                PreparedStatement ps = conn.prepareStatement("select * from tb_file where filename = ?");
                ps.setString(1, "aaa.exe");
                ResultSet rs = ps.executeQuery();
                rs.next();
                InputStream in = rs.getBinaryStream("filecontent");
                System.out.println(in.available());
                FileOutputStream out = new FileOutputStream("d:/test.doc");
                byte[] b = new byte[1024];
                int len = 0;
                while ((len = in.read(b)) != -1) {
                    out.write(b, 0, len);
                    out.flush();
                }
                out.close();
                in.close();
                rs.close();
                ps.close();
            }
        } catch (Exception ex) {
            ex.printStackTrace(System.out);
        } finally {
            if (null != conn)
                conn.close();
        }
    }