使用JDBC4.0操作Oracle中BLOB类型的数据方法

create sequence seq_blobmodel_id start with 1 increment by 1 nocache;create table blobmodel(blobid number(10) primary key not null,image blob); 将文件写入数据库/*** 将图片文件存入数据库* @throws SQLException* @throws IOException*/public int writeBlob(String path) throws SQLException, IOException{int result = 0;String sql = "insert into blobmodel(blobid,image) values(seq_blobmodel_id.nextval,?)";//1.创建BlobBlob image = DBHelper.getConnection().createBlob();//2.将流放入blobOutputStream out = image.setBinaryStream(1);//3.读取图片,并写入输出流FileInputStream fis = new FileInputStream(path);byte []buf = new byte[1024];int len = 0;while((len=fis.read(buf))!=-1){out.write(buf, 0, len);}result = DBHelper.executeUpdate2(sql, new Object[]{image});//自己简单封装了jdbc操作fis.close();out.close();return result;}

/*** 将数据库中的图片文件读出来* @throws SQLException * @throws IOException */public void readBlob() throws SQLException, IOException{String sql = "select image from blobmodel where blobid=?";DBHelper.getConnection();//ResultSet rs = DBHelper.executeQuery(sql, new Object[]{1});while(rs.next()){Blob image = rs.getBlob(1);InputStream is = image.getBinaryStream();BufferedInputStream bis = new BufferedInputStream(is);String path = "img/"+new Date().getTime()+".jpg";//指定输出的目录为项目下的img文件夹BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(path));byte []buf = new byte[1024];int len = 0;while((len=bis.read(buf))!=-1){bos.write(buf,0,len);}bos.close();bis.close();}}