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<HTML><HEAD><title>DNS Service Provider for the JNDI 1.2 Optional Package</title></HEAD><BODY BGCOLOR="#FFFFFF" TEXT=#000000 LINK=#0000ff VLINK=#000077ALINK=#ff0000><hr SIZE=3 NOSHADE WIDTH="100%"><center><h1>DNS Service Provider for the <br>Java Naming and Directory Interface<font size=4><sup>TM</sup></font> (JNDI) 1.2<br>Optional Package</h1></center><hr SIZE=3 NOSHADE WIDTH="100%"><P><FONT SIZE=-1>Please send feedback to <a href="mailto:jndi@java.sun.com">jndi@java.sun.com</a></FONT><P><P><I>Table of Contents</I><UL><LI><A HREF="#INTRO">Introduction</A></LI><LI> <A HREF="#JDK14">Java<sup>TM</sup> 2 SDK, Standard Edition, v 1.4</A></LI><LI> <A HREF="#JDK13">Java<sup>TM</sup> 2 SDK, Standard Edition, v 1.3.x</A></LI><LI> <A HREF="#JDK12">Java<sup>TM</sup> 2 SDK, Standard Edition, v 1.2.x</A></LI></UL><P><HR><P><A NAME="INTRO"><H2>Introduction</H2><p>This document is a companion to the main<a href=jndi-dns.html>DNS Service Provider</a>document.It describes how to use the DNS service providerwith the Java 2 SDK, Standard Edition, versions 1.2.x and 1.3.x.The DNS service provider is not supported on earlier JDK releases,and comes bundled with the J2SDK v 1.4.<p><hr><p><A NAME="JDK14"><H2>Java 2 SDK, Standard Edition, v 1.4</H2><p><h4>Software Dependencies</h4><ul><li>A DNS server.</ul><h4>Software Installation</h4>Since the DNS service provider is bundled as part of the J2SDK v 1.4,the software included in the DNS service provider's distribution fileneed not be installed.<p><hr><p><A NAME="JDK13"><H2>Java 2 SDK, Standard Edition, v 1.3.x</H2><h4>Software Dependencies</h4><ul><li>A DNS server.</ul><h4>Software Installation</h4><ol><li>Unzip the distribution file to get a <tt>lib</tt> and a <tt>doc</tt>directory. <li>If you are installing the DNS provider as an <em>installed</em>extension, copy the JARs <tt>dns.jar</tt> and <tt>providerutil.jar</tt>from the <tt>lib</tt> directory to the Java 2 SDK's <tt>jre/lib/ext</tt>directory.<li>If you are not installing the DNS provider as an installed extension,copy the JARs <tt>dns.jar</tt> and <tt>providerutil.jar</tt>to their permanent location and add this location to your classpath.</ol> <A NAME="JDK13SEC"><h4>Security Considerations</h4>When a security manager has been installed, you must grant the application permission to connect to the DNS servers:<p><pre>permission java.net.SocketPermission "<em>host</em>[:<em>port</em>]", "connect,accept";</pre>for the <em>host</em> and <em>port</em> pairssupplied in the java.naming.factory.initial property, and in any URLstring names supplied to context methods.<p>If you have not installed the DNS service provider as aninstalled extension (that is, <tt>dns.jar</tt> has not been installed in theJava 2 SDK's <tt>jre/lib/ext</tt> directory),perform the following additional step:<ul><li>Grant the permissions listed aboveto the DNS service provider (<tt>dns.jar</tt>).</ol><hr><p><A NAME="JDK12"><H2>Java 2 SDK, Standard Edition, v 1.2.x</H2><p><h4>Software Dependencies</h4><ul><li><a href=http://java.sun.com/products/jndi/#download>JNDI 1.2</a>.<br>Install <tt>jndi.jar</tt> as described in<a href="../jndi-ext.html#JDK12">the JNDI 1.2 Optional Package document</a>.<li>A DNS server.</ul><h4>Software Installation</h4>Follow the directions given for the Java 2 SDK v 1.3.x<a href=#JDK13>above</a>. <h4>Security Considerations</h4>The security considerations described for the Java 2 SDK v 1.3.x<a href=#JDK13SEC>above</a> apply here as well.<p>If you have not installed JNDI 1.2 as aninstalled extension (that is, <tt>jndi.jar</tt> has not been installed in theJava 2 SDK's <tt>jre/lib/ext</tt> directory),perform the following additional step:<ul><li>Grant the permissions listed in<a href="../jndi-ext.html#SEC">the JNDI 1.2 Optional Package document</a>.</ol><p><HR SIZE=3 NOSHADE WIDTH=100%><br><i>Copyright © 2001 Sun Microsystems, Inc., All Rights Reserved.</i> </body></html>⌨️ 快捷键说明
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