JDBC读取BLOB类型

public

String getBlob(String SQL){

Connection conn =

null

;

PreparedStatement stmt =

null

;

ResultSet rs =

null

;

try

{

conn = dataSource.getConnection();

//c3p0连接池

stmt = conn.prepareStatement(SQL);

//SQL: select info from table1 (其中info字段是blob类型)

rs = stmt.executeQuery();

InputStream in = rs.getBinaryStream(

1

);

ByteArrayOutputStream outStream =

new

ByteArrayOutputStream();

byte

[] data =

new

byte

[

4096

];

int

count = -

1

;

while

((count = in.read(data,

0

,

4096

)) != -

1

)

outStream.write(data,

0

, count);

data =

null

;

String result =

new

String(outStream.toByteArray(),

"utf-8"

);

}

catch

(SQLException sqle) {

log.warn(

"Exception XXX"

, sqle);

}

finally

{

conn.close();

stmt.close();

}

}