图片存取功能（支持mysql,oracle,sqlserver）

package org.pic; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * 图片数据库存取 * @author lww * */ public class SavePic { public static Connection conn = null; public static PreparedStatement pStmt = null; /** * 数据库中加入图片等文件 */ public static void InsertPic() { try { //oracle // String sql = "insert into TEACHER(ID,NAME,PHOTO,BASE64PHOTO) values('1',?,?,?)"; // Class.forName("oracle.jdbc.driver.OracleDriver"); // conn = DriverManager.getConnection( // "jdbc:oracle:thin:@//192.168.1.183:1521/orcl", // "LWW", "lww"); //mysql // String sql = "insert into doc(ID,NAME,PHOTO,BASE64PHOTO) values('1',?,?,?)"; // Class.forName("com.mysql.jdbc.Driver"); // conn = DriverManager.getConnection( // "jdbc:mysql://192.168.1.239:3306/test", // "jtang", "jtang123"); //sqlserver Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String sql = "insert into doc(ID,NAME,PHOTO,BASE64PHOTO) values('1',?,?,?)"; conn = DriverManager.getConnection( "jdbc:sqlserver://192.168.1.204:1433;DatabaseName=TestForBI", "sa", "123456"); pStmt = conn.prepareStatement(sql); pStmt.setString(1, "Lily");// 设置字段NAME值 // 数据库插入图片/word/excel等 File file = new File("src/doc.png"); FileInputStream fis = new FileInputStream(file); //创建一个和文件大小一样的缓冲区 byte[] buffer = new byte[fis.available()]; fis.read(buffer); pStmt.setBytes(2, buffer);//内容设置到字段PHOTO中 System.out.println("未加密图片长度："+file.length()); String base64 = new BASE64Encoder().encode(buffer); System.out.println("加密后图片长度：" +base64.length()); pStmt.setBytes(3, base64.getBytes());//内容设置到字段BASE64PHOTO中 int n = pStmt.executeUpdate(); System.out.println(n + "条记录插入"); } catch (SQLException e) { e.printStackTrace(); } catch ( IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { try { pStmt.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } /** * 从数据库中取出图片等文件 * @throws ClassNotFoundException */ public static void getPic() throws ClassNotFoundException { try { //Oracle // String sql = "select ID,NAME,PHOTO,BASE64PHOTO from TEACHER where ID=?"; // Class.forName("oracle.jdbc.driver.OracleDriver"); // conn = DriverManager.getConnection( // "jdbc:oracle:thin:@//192.168.1.183:1521/orcl", // "LWW", "lww"); //mysql // Class.forName("com.mysql.jdbc.Driver"); // String sql = "select ID,NAME,PHOTO,BASE64PHOTO from doc where ID=?"; // conn = DriverManager.getConnection( // "jdbc:mysql://192.168.1.239:3306/test", // "jtang", "jtang123"); //sqlserver Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String sql = "select ID,NAME,PHOTO,BASE64PHOTO from doc where ID=?"; conn = DriverManager.getConnection( "jdbc:sqlserver://192.168.1.204:1433;DatabaseName=TestForBI", "sa", "123456"); pStmt = conn.prepareStatement(sql); pStmt.setString(1, "1"); ResultSet rs = pStmt.executeQuery(); if (rs.next()) { System.out.println("ssssssssss"); //获取图片字段 // FileOutputStream fos = new FileOutputStream(new File("abc.jpg")); // InputStream is = rs.getBinaryStream("photo"); // // byte[] buffer = new byte[4 * 1024]; // int length = 0; // while ((length = is.read(buffer)) != -1) { // fos.write(buffer, 0, length); // } //获取图片加密字段内容，并进行base64解密 FileOutputStream fos = new FileOutputStream(new File("abcbase64.jpg")); byte[] basebt = rs.getBytes("base64photo"); // System.out.println("加密：" +new String(basebt)); System.out.println("加密：" +basebt.length); byte[] by = new BASE64Decoder().decodeBuffer(new String(basebt)); System.out.println("解密：" +by.length); // System.out.println("解密：" +new String(by)); fos.write(by, 0, by.length); fos.flush(); fos.close(); // is.close(); } } catch (Exception e) { e.printStackTrace(); } finally { try { pStmt.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public static void main(String[] args) throws ClassNotFoundException { InsertPic();//把图片保存到数据库中 getPic();//获取字段并生成图片 } }