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PHP中的Java扩展_PHP

Jun 01, 2016 pm 12:35 PM
javapathphpInstallExpandsystem

java/>Java的易扩展性是它极其的令人兴奋的用途之一通过学习如何使用这个模块你可以扩展所有的可用到的Java类。为了使您了解到Java扩展性的基础本篇文章包括系统的安装和一些PHP和Java一起使用的代码例子。



Windows下安装



以下的配置是基于Apache 1
.3.12, PHP 4.0.3 您可以在www.php4win.de下载和JDK1.2.2 您可以在java.sun.com下载。我们已经在更老版本的JDK和Windows 95, Windows 98 and NT4下的各种的MS webservers(PWS和IIS)尝试过这种安装配置。



第一步
安装JDK

这个过程想当简单
由于JDK的安装没有过多的问题但你需要做的是查看你的系统环境在Windows9X中的autoexec.bat和NT环境下“控制面板”中的“系统”并且确认JDK1.x.x\bin路径是否加载到path中。这个设置将会使你在编译Java类是变得更轻松。在Win9x中加入



PATH
=%PATH%;C:\jdk1.2.2\bin



到你系统的autoexec
.bat 在NT的系统中加入



;C:\jdk1.2.2\bin



到Path环境变量的末端。在系统中的autoexec
.bat的标注是十分重要的。PHP的Java扩展将会忽JAVA_HOME和CLASSPATH在系统中的安装路径这样一来在php.ini中正确的设置这些项目就是十分的重要了。



第二步
修改你的php.ini

你需要加入如下的几项到你的php
.ini文件



[java]

extension
=php_java.dll

java
.home = C:\jdk1.2.2

java
.library = c:\jdk1.2.2\jre\bin\CLASSIC\jvm.dll

java
.library.path=c:\web\php4\extensions\

java
.class.path="c:\web\php4\extensions\jdk1.2.2\php_java.jar;c:\myclasses"



具有代表性的问题是
有些人会把extension=php_java.dll与其它的extensions在php.ini文件中放在一起但是它正确的位置应该是在php.ini文件中的[java]下面。java.library.path一定是在php_java.dll中被设置好的并且java.class.path中一定要包含php_java.jar的路径。java.class.path还要加入其它你可能使用其它的类的路径正如上面所举的例子中的c:\myclasses或者你也可以只写前面的那段路径。



第三步
测试你的安装成果

现在
你可以建立一了类似于这样的一段php程序了




$system
= new Java("java.lang.System");

print "Java version=".$system->getProperty("java.version")."
\n"
;

print "Java vendor=".$system->getProperty("java.vendor")."

\n\n"

;

print "OS=".$system->getProperty("os.name")." ".

$system
->getProperty("os.version")." on ".

$system
->getProperty("os.arch")."
\n"
;



$formatter
= new Java("java.text.SimpleDateFormat","EEEE,

MMMM dd, yyyy 'at' h:mm:ss a zzzz"
);

print $formatter->format(new Java("java.util.Date"))."\n";



?>

这是一个Sam Ruby做的例子。如果你把没一项都设置好的话
你将会看到象这样的结果

Java version
=1.2.2

Java vendor
=Sun Microsystems Inc.

OS
=Windows 95 4.10 on x86

Wednesday
, October 18, 2000 at 10:22:45 AM China Standard Time



译者注在本人的机器上运行的结果

Java version
=1.2.2

Java vendor
=Sun Microsystems Inc.

OS
=Windows 95 4.90 on x86

星期三
, 三月 28, 2001 at 1:44:33 下午 GMT+08:00



这是一个非常简单的例子
但它可以告诉你用php如何访问java类一旦你能让这个例子转起来就说明你的php的java扩展已经安装成功。

原作者
Mark Nold,Joost Soeterbroek

来 源
phpbuild

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