oracle - 在目录中查找文件列表的问题

Question

我想检索特定文件夹中所有文件的列表，其中包括 oracle 表单和菜单和报告以及一些 txt 文件...

您知道如何以 ORACLE 形式检索这些数据，并将它们自动插入到我的数据块中吗？

我使用oracle form 6.0。

Answer 1

I did something along these lines:

Create an Oracle directory for the directory you want to list:

create or replace directory YOURDIR
  as '\path\to\your\directory';

Build a temporary table:

create global temporary table DIR_LIST
(
  FILENAME VARCHAR2(255),
)
on commit preserve rows;
grant select, insert, update, delete on DIR_LIST to PUBLIC;

You'll need a java stored procedure:

create or replace and compile java source named dirlist as
import java.io.*;
  import java.sql.*;
  import java.text.*;

  public class DirList
  {
  public static void getList(String directory)
                     throws SQLException
  {
      File dir = new File( directory );
      File[] files = dir.listFiles();
      File theFile;

      for(int i = 0; i < files.length; i++)
      {
          theFile = files[i];
          #sql { INSERT INTO DIR_LIST (FILENAME)
                 VALUES (:theName };
      }
  }

  }

And a PL/SQL callable procedure to invoke the java:

CREATE OR REPLACE PROCEDURE get_dir_list(pi_directory IN VARCHAR2)
AS LANGUAGE JAVA
name 'DirList.getList(java.lang.String)';

Finally, calling the procedure get_dir_list inside your form will populate the table with the files in your directory, which you can then read into your form block.

The java code came straight out of a Tom Kyte book (don't recall which one).

EDIT:

Actually, all the code is pretty much lifted from this AskTom thread.

Answer 2

外部表还有另一种有趣的方法，它可以更轻松地检索此类列表，而无需使用 Java 存储过程：

$ mkdir /tmp/incoming

$ cat >/tmp/incoming/readdir.sh<<eof
#/bin/bash
cd /tmp/incoming/
/bin/ls -1
eof

# test files
$ for i in {1..5}; do touch /tmp/incoming/invoice_no_$RANDOM.pdf; done

在 SQL*Plus 中：

create or replace directory incoming as '/tmp/incoming';

Directory INCOMMING created.

create table files (filename varchar2(255))
organization external ( 
    type oracle_loader
    default directory incoming
    access parameters (
        records delimited by newline
        preprocessor  incoming:'readdir.sh'
        fields terminated by "|" ldrtrim
    )
location ('readdir.sh')
);
/

Table FILES created.

select * from files;

FILENAME                                                                       
--------------------------------------------------------------------------------
FILES_27463.log                                                                 
invoice_no_20891.pdf                                                            
invoice_no_2255.pdf                                                             
invoice_no_24086.pdf                                                            
invoice_no_30372.pdf                                                            
invoice_no_8340.pdf                                                             
readdir.sh                                                                      

 7 rows selected 

这种方法是在@DCookie 的回答中提到的同一个Ask Tom 线程中添加的。