How to use the type 4 of DBF JDBC 2.0 Driver?

Question

Hi,
I download the "DBF JDBC 2.0 Driver package" from http://memebers.tripod.com/~ZYH/jdbc.html and copy it into my classpath.
But I cannot find its Driver name string using in Class.forName(<DriverName>). And I also need the Connection String in Con.getConnection(<ConnectionString>).
It will be great appreciated if you can give me any information.
Thans a lot in advance!
Jane

Answer 1

Dear Jiehua Huang,
First, you need to download JDK1.2, 1.3 or 1.4 from www.javasoft.com if
you use DBF JDBC 2.0 package(DBF_JDBC20.jar). You can download JDK1.1.X
too if you use DBF JDBC 1.2 package(DBF_JDBC12.jar).
Secondly, please add DBF_JDBC20.jar (or DBF_JDBC12.jar) to your Java
class path, for instance, "SET
CLASSPATH=c:\javalib\DBF_JDBC2.0.jar;%classpath". You can also use "java
-classpath c:\javalib\dbf.jar yourDBFclass" to run your class. More
information about classpath, please read the "Setting the Classpath"
topic in file:///yourdriver|/jdk1.2/docs/tooldocs/tools.html . You can
use "java -classpath c:\javalib\DBF_JDBC20.jar yourDBFclass" or "java
-classpath c:\javalib\DBF_JDBC12.jar yourDBFclass" too.
Thirdly, you can use
'Class.forName("com.hxtt.sql.dbf.DBFDriver").newInstance();' or
Class.forName("com.hxtt.sql.dbf.DBFDriver");' to load this driver.
Fourth, if you have used other JDBC driver, you only need to know the
correct URL format for DriverManager.getConnection(url,"",""); You can
find the URL format from "testDBF.java". If you were a Java novice,
please read also other Java examples code in JDBC20demo.zip or
JDBC12demo.zip.
DBF URL format:
Direct Access:
jdbc:dbf:[/]/[DatabasePath] (You can omit that "//"
characters)
For example:
"jdbc:dbf:/."
"jdbc:dbf:/c:/dbffiles"
"jdbc:DBF:////usr/data" for unix or linux:
"jdbc:DBF:/./data"
Access by DBF Server: Skip it if you don't use RMI or JINI.
jdbc:DBF://hostname:port/[DatabasePath]
For example:
"jdbc:DBF://domain.com:3099/dbffiles" if
one DBFServer is run on the 3099 port of domain.com
Last, DBF driver is a standard JDBC driver so that you will find most of
valuable information at
file:///yourdrive|/jdk1.2/docs/api/java/sql/package-frame.html .
DBF supports SQL Minimum Grammar, which is a subset of the Entry level
syntax of SQL-92.
The major syntax is listed below:
CREATE TABLE base-table-name (column-identifier data-type
[,column-identifier data-type]...)
DROP TABLE base-table-name
DELETE FROM table-name [WHERE search-condition]
INSERT INTO table [ ( column [, ...] ) ] { VALUES ( expression [,
...] ) | SELECT query }
UPDATE table-name SET column-identifier = {expression | NULL }[,
column-identifier = {expression | NULL}]... [WHERE search-condition]
SELECT [ALL | DISTINCT ]select-list FROM table-reference-list
[WHERE search-condition] [group-by-clause] [order-by-clause]
CREATE [UNIQUE] INDEX indexName[(keylength)][,...] [OF
indexFileName] ON tableName (expression UNIQUE ASC
[FOR lExpression][,...])
DROP INDEX {ALL | indexName[,indexName2,...]} [of indexFileName]
ON table-name
REINDEX {ALL | indexFileName[,indexfiLEName2,...]} ON table-name
DBF driver will use index to speed up the query which contains some
index expressions. If a table has a structural .CDX or .IDX file, the
file is opened automatically when the table is opened. You have to run
the DBFIndex once to supply the necessary index file information for the
nonstructural index file which hasn't the same file name as its table
name and is created by other xbase applications. Then DBF will create a
special table.INDICES file and maintain the index files automatically.
You can use "java com.hxtt.sql.dbf.DBFIndex" to find out how to supply
existent index files. Useage: java com.hxtt.sql.dbf.DBFIndex
dbfTablePath tableName indexFileFullName1 [indexFileFullName2 ...]. For
instance, you have a legacy 'product.dbf' file with prodname.idx,
prodprice.idx and orderdate.idx on "c:\proudct\data" directory, you can
run "java com.hxtt.sql.dbf.DBFIndex c:\proudct\data product prodname.idx
prodprice.idx orderdate.idx" once. Then DBF will create a special
product.INDICES file and maintain the index files automatically. All
operations of update, insert and delete will update the .IDX files that
are related to the DBF file. DBF driver doesn't index all deleted records.
File name is case sensitive on unix OS. For unix or linux, DBF will try
to seek acquiescently dbf files with the suffixs like ".DBF" for the
first time, and ".dbf" for the second time. If it failed to find out a
suitable dbf file, it will try other mixture method. You can also use
the full table name to quote your table. For instance, 'select * from
"Test.dBf"'.
Any question or problem? Please don't hesitate to let me know.
With best regards,
Zhao Yonghong
System Analyst
[email protected]