oracle二进制怎么存,oracle数据库二进制文件

如何将二进制文件存入Oracle数据库中

先把文件读取到内存,再以二进制格式保持到数据库中的大字段中(clob或clob)。

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写大对象。

Java code

public static void main(String[] args) {

// TODO Auto-generated method stub

Connection conn = null;

Statement stat = null;

ResultSet rs = null;

OutputStream os = null;

FileInputStream fis = null;

int bs = 0;

try {

Class.forName("oracle.jdbc.driver.OracleDriver");

conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:oraDB","bigfou","---");

conn.setAutoCommit(false);

stat = conn.createStatement();

stat.executeUpdate("insert into t_video(id,video) values(1,empty_blob())");

rs = stat.executeQuery("select video from t_video where id = 1");

rs.next();

oracle.sql.BLOB blo = (oracle.sql.BLOB)rs.getBlob(1);

os = blo.getBinaryOutputStream();

bs = blo.getBufferSize();

fis = new FileInputStream("D:\\Temp\\MPlayer-CVS-20040808-KK\\mplayer.exe");

byte[] buf = new byte[bs];

int length = 0;

while(true)

{

length = fis.read(buf);

if(length == -1) break;

os.write(buf,0,length);

}

os.close();

os = null;

fis.close();

fis = null;

conn.commit();

conn.setAutoCommit(true);

conn.close();

} catch(Exception ex) {

ex.printStackTrace();

}

}

读大对象

Java code

InputStream is = null;

FileOutputStream fos = null;

byte[] buf = null;

int bs = 0;

try {

Class.forName("oracle.jdbc.driver.OracleDriver");

conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:oraDB","bigfou","-");

conn.setAutoCommit(false);

stat = conn.createStatement();

rs = stat.executeQuery("select video from t_video where id = 1");

rs.next();

oracle.sql.BLOB blo = (oracle.sql.BLOB)rs.getBlob(1);

bs = blo.getBufferSize();

buf = new byte[bs];

int length = 0;

is = blo.getBinaryStream();

fos = new FileOutputStream("d:\\test.exe");

while(true) {

length = is.read(buf);

if(length == -1) break;

fos.write(buf,0,length);

}

fos.close();

fos = null;

is.close();

is = null;

conn.commit();

conn.setAutoCommit(true);

conn.close();

...

如何把 上传的文件 转成二进制存入oracle中的BLOB字段上,恳请高手们指导一下

更新数据的时候,写insert语句的时候,不更新blob字段,blob字段对应的数据用 empty_blob() 代替就行。

(注意:在执行上面那个 sql 之前,一定要把 connection 设置成不自动提交: conn.setAutoCommit(false); )

最后单独出来blob字段:

//把 blob 字段取出来

String sql = "select ANNEX from market_info_collect_t where info_id='"

+ infoId + "' for update ";

Statement stt=null;

stt = conn.createStatement();

rs = stt.executeQuery(sql);

if (rs.next()) {

blob = (oracle.sql.BLOB) rs.getBlob("ANNEX");

outStream = blob.getBinaryOutputStream();

instream = myFile.getContentStream();

byte[] data = new byte[instream.available()];

instream.read(data);

outStream.write(data, 0, data.length);

}

instream.close();

outStream.flush();

outStream.close();

上面这段是我以前写过的代码中的一部分,你看一下,希望对你能有帮助。。。

ORACLE 存二进制用什么数据类型

可以用blob或bfile类型来存储该类二进制数据。具体说明如下: ★ blob:用来存储可变长度的二进制数据,blob数据在数据库之间或在客户机与服务器进程之间传递,yVSkyV


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