📄 getpropinfo.htm
字号:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Listing All Available Parameters for Creating a JDBC Connection (Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<META CONTENT="no-cache" HTTP-EQUIV="Pragma">
<LINK href="/almanac.css" media="screen" type="text/css" rel="stylesheet">
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD></TD>
</TR>
</TABLE>
<br>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD></TD>
</TR>
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top">
<h1>The Java Developers Almanac 1.4</h1>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD valign="top"><script type="text/javascript">
<!--
google_ad_client = "pub-6001183370374757";
google_ad_width = 120;
google_ad_height = 600;
google_ad_format = "120x600_as";
google_ad_channel = "4777242811";
google_ad_type = "text_image";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "6666CC";
google_color_url = "6666CC";
google_color_text = "000000";
//--></script><script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"></script></TD><TD> </TD><TD valign="top">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<A HREF="../java.sql/pkg.html">java.sql</A><font color="#666666" class="xsmall-font">
[73 examples]
</font>
>
<B><A HREF="../java.sql/pkg.html#Connections">Connections</A></B><font color="#666666" class="xsmall-font">
[10 examples]
</font>
</DIV><P>
<h3>e238. Listing All Available Parameters for Creating a JDBC Connection</h3>
<code>Driver.getPropertyInfo()</code> returns a list of all available properties
that can be supplied when using the driver to create a JDBC
connection. This list can be displayed to the user.
<pre> try {
// Load the driver
String driverName = <font color="#0066ff"><i>"org.gjt.mm.mysql.Driver"</i></font>; // MySQL MM JDBC driver
Class.forName(driverName);
// Get the Driver instance
String url = "jdbc:mysql://a/b";
Driver driver = DriverManager.getDriver(url);
// Get available properties
DriverPropertyInfo[] info = driver.getPropertyInfo(url, null);
for (int i=0; i<info.length; i++) {
// Get name of property
String name = info[i].name;
// Is property value required?
boolean isRequired = info[i].required;
// Get current value
String value = info[i].value;
// Get description of property
String desc = info[i].description;
// Get possible choices for property; if null, value can be any string
String[] choices = info[i].choices;
}
} catch (ClassNotFoundException e) {
// Could not find the database driver
} catch (SQLException e) {
}
</pre>
Here's the property values for the MySql driver:
<pre> Name(isRequired): Description
default: default value
choices: ...
HOST(true): Hostname of MySQL Server
default: a
PORT(false): Port number of MySQL Server
default: 3306
DBNAME(false): Database name
default: b
user(true): Username to authenticate as
default: null
password(true): Password to use for authentication
default: null
autoReconnect(false): Should the driver try to re-establish bad connections?
default: false
choices: true, false
maxReconnects(false): Maximum number of reconnects to attempt if autoReconnect is true
default: 3
initialTimeout(false): Initial timeout (seconds) to wait between failed connections
default: 2
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
<b>Related Examples</b></font></td>
</tr>
</table>
e235. <a class="eglink" href="ConnectOracle.html?l=rel">
Connecting to an Oracle Database
</a>
<br>
e236. <a class="eglink" href="ConnectMySql.html?l=rel">
Connecting to a MySQL Database
</a>
<br>
e237. <a class="eglink" href="ConnectSqlServer.html?l=rel">
Connecting to a SQLServer Database
</a>
<br>
e239. <a class="eglink" href="CanTrans.html?l=rel">
Determining If a Database Supports Transactions
</a>
<br>
e240. <a class="eglink" href="Commit.html?l=rel">
Committing and Rolling Back Updates to a Database
</a>
<br>
e241. <a class="eglink" href="GetSqlException.html?l=rel">
Handling a SQL Exception
</a>
<br>
e242. <a class="eglink" href="GetSqlWarnings.html?l=rel">
Determining If a SQL Warning Occurred
</a>
<br>
e243. <a class="eglink" href="Conn2Driver.html?l=rel">
Getting the Driver of a Connection
</a>
<br>
e244. <a class="eglink" href="GetFetchSize.html?l=rel">
Setting the Number of Rows to Prefetch When Executing a SQL Query
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Batching">
Batching
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Database%20Meta%20Data">
Database Meta Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Deleting%20Data">
Deleting Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Drivers">
Drivers
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Importing%20and%20Exporting">
Importing and Exporting
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Inserting%20and%20Updating%20Data">
Inserting and Updating Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Oracle%20OBJECTs">
Oracle OBJECTs
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Oracle%20VARRAYs">
Oracle VARRAYs
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Procedures%20and%20Functions">
Procedures and Functions
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Retrieving%20Data">
Retrieving Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Scrollable%20Result%20Sets">
Scrollable Result Sets
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Tables">
Tables
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Updatable%20Result%20Sets">
Updatable Result Sets
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT class="xsmall-font">
© 2002 Addison-Wesley.
</FONT></TD><TD> </TD><TD valign="top"><A href="http://compositesw.com/devzone?ref=javaalmanac"><IMG alt="Click Here" height="600" width="120" border="0" src="/csw_oad_120x600_final.gif"></A></TD>
</TR>
</TABLE>
</BODY>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<META CONTENT="NO-CACHE" HTTP-EQUIV="PRAGMA">
</HEAD>
</HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -