学习随笔images/icons/3.gif前两天一网友问题怎么做?才去查一下资料,试验了一下
//Create.java import java.sql.*; public class Create { public static void main(String[] args) { Connection con; Statement st; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\Test\\data.mdb"; con = DriverManager.getConnection(url, "", ""); st = con.createStatement(); st.execute("CREATE TABLE [mytable]([id] autoincrement, [picname] varchar(50), pic image);"); //我用 Access 做下简单测试, oracle 数据库用 "CREATE TABLE mytable(id autoincrement, picname varchar(50), pic BLOB);" 建表 st.close(); con.close(); } catch(Exception e) { e.printStackTrace(); } } }
// SavePic.java 将图片保存至数据库 import java.sql.*; import java.io.*; public class SavePic { public static void main(String[] args) { Connection con; PreparedStatement st; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\Test\\data.mdb"; con = DriverManager.getConnection(url, "", ""); String sql = "INSERT INTO mytable(picname, pic) VALUES('雅林',?)"; st = con.prepareStatement(sql); File f = new File("C:/Test/a.jpg"); FileInputStream fis = new FileInputStream(f); st.setBinaryStream(1, fis, (int)f.length()); st.executeUpdate(); st.close(); con.close(); } catch(Exception e) { e.printStackTrace(); } } }
//ReadPic.java 从数据库中读出图片存成文件 import java.sql.*; import java.io.*; public class ReadPic { public static void main(String[] args) { Connection con; Statement st; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\Test\\data.mdb"; con = DriverManager.getConnection(url, "", ""); String sql = "SELECT pic FROM mytable WHERE picname='雅林'"; st = con.createStatement(); ResultSet rs = st.executeQuery(sql); rs.next(); File f = new File("C:/Test/b.jpg"); FileOutputStream fos = new FileOutputStream(f); InputStream is = rs.getBinaryStream("pic"); int c; byte b[] = new byte[4*1024]; while ((c=is.read(b))!=-1) { fos.write(b, 0, c); } fos.flush(); is.close(); st.close(); con.close(); } catch(Exception e) { e.printStackTrace(); } } }]]>2007-06-15 02:23:331970-01-01 08:00:0002390