首先,您必须创建将包含 BLOB 表的类型:
CREATE OR REPLACE TYPE tab_blobs AS TABLE OF BLOB;
在 Java 中,您必须依赖 Oracle sql 提供的 STRUCT 类型。
您将创建一个 STRUCT,其中包含要存储到 DB 中的 BLOB 数组。
代码如下所示:
import java.sql.Connection;
import java.sql.SQLException;
import oracle.jdbc.driver.OracleDriver;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import oracle.sql.STRUCT;
import oracle.sql.StructDescriptor;
public class ArrayDemo
{
public static void passArray()
throws SQLException
{
Connection conn = new OracleDriver().defaultConnection();
byte[] fileInByteArray = "value".getBytes();
StructDescriptor itemDescriptor = StructDescriptor.createDescriptor("BLOB", conn);
Object[] itemAtributes = new Object[] {};
STRUCT itemObject1 = new STRUCT(itemDescriptor, conn, itemAtributes);
itemAtributes = new Object[] {};
STRUCT itemObject2 = new STRUCT(itemDescriptor, conn, itemAtributes);
STRUCT[] idsArray = { itemObject1, itemObject2 };
ArrayDescriptor descriptor = ArrayDescriptor.createDescriptor("IDS_TABLE", conn);
ARRAY array_to_pass = new ARRAY(descriptor, conn, idsArray);
OraclePreparedStatement ps = (OraclePreparedStatement) conn.prepareStatement("begin getInfo(:x); end;");
ps.setARRAY(1, array_to_pass);
ps.execute();
}
}
但是你为什么不通过迭代文件来简化处理,一个接一个地插入它们:
public static void insererBlob(String name, String path) {
File file = new File(path);
try{
//link to DB
Connection connection = DriverManager.getConnection("url","user","password");
//link to file
FileInputStream stream = new FileInputStream(file);
//prepare the SQL instruction
String sql = "INSERT INTO file_table VALUES (?, ?)";
PreparedStatement statement = connection.prepareStatement(sql);
//blob insertion
statement.setString(1, name);
statement.setBinaryStream(2, stream, (int)file.length());
statement.executeUpdate();
}catch(Exception e){
//ERROR SQL, IO, etc .
}finally {
//close connection ?
}
}