创建使用外部JAR Java小程序 [英] Creating Java applet using external JARS
问题描述
我创建了一个Java小程序在Netbeans中使用多个外部库。当我运行在NetBeans中applet.java文件它工作正常，我试图让一个网页相同的结果。
当我在build文件夹运行自动创建applet.html文件它不会加载外部库，尽管我在APPLET归档标签指定并将其移动到同一文件夹中。
下面是我的html文件：
＆LT; HTML＆GT;
＆所述; HEAD＆GT;
＆LT; TITLE＆GT; Applet的HTML页面＆LT; / TITLE＆GT;
＆LT; / HEAD＆GT;
＆LT; BODY＆GT;＆LT; H3＆GT;＆LT; HR WIDTH =100％＆GT; Applet的HTML页面＆LT; HR WIDTH =100％＆GT;＆LT; / H3 GT＆;＆所述;差异无显着
＆LT; APPLET codeBase的=类code =小程序/ MyApplet.classWIDTH = 350 HEIGHT = 200归档=jcommon-1.0.17.jar，JFreeChart的-1.0.14.jar，sqljdbc4。罐子＆GT;＆LT; / APPLET＆GT;
＆所述; /差异无显着＆所述; HR WIDTH =100％＆GT;＆下; FONT SIZE = -1＆GT;＆下; I＆GT;可以通过NetBeans IDE的＆下生成的; / I GT;＆下; / FONT＆GT;
＆LT; / BODY＆GT;
＆LT; / HTML＆GT;
该库是第三方的Java（JFreeChart的和SQL-JDBC驱动程序）
使用外部JAR创建Java小程序
一提到它们添加到
小程序元素的归档属性。＆LT; APPLET codeBase的=类code =小程序/ MyApplet.classWIDTH = 350 HEIGHT = 200归档=jcommon-1.0.17。罐子，jfreechart的-1.0.14.jar，sqljdbc4.jar＆GT;＆LT; / APPLET＆GT;重新格式化，让
＆LT; APPLET
codeBase的=类
code =小程序/ MyApplet.class
宽度= 350
高度= 200
归档=jcommon-1.0.17.jar，JFreeChart的-1.0.14.jar，sqljdbc4.jar＆GT;
＆LT; / APPLET＆GT;1
code =小程序/ MyApplet.class应该是类的完全限定名。如果类名是
MyApplet和包小程序，即转换为：code =applet.MyApplet2
归档=jcommon-1.0.17.jar，JFreeChart的-1.0.14.jar，sqljdbc4.jar＆GT;只是检查，是在applet.MyApplet
jcommon-1.0.17.jar？3
codeBase的=类这听起来很可怕。这是一个全面的网络应用程序与JSP / servlet的？如果是这样，我怀疑这条道路是错误的，因为它指向一个客户端（浏览器或）小程序不能访问服务器上的一个地方。试着做一个直接取（粘贴到浏览器地址栏中的地址预期，并创下'进入'）上的每个小程序罐，如果
MyApplet.class不在一个罐子，做松类文件单独检查。I've created a Java Applet in Netbeans that uses several external libraries. When I run the applet.java file within Netbeans it works fine and I'm trying to get the same result in a web page.
When I run the automatically created applet.html-file in the build-folder it doesn't load the external library, even though I have specified them in APPLET archive-tag and moved them to the same folder.
Here is my html-file:
<HTML> <HEAD> <TITLE>Applet HTML Page</TITLE> </HEAD> <BODY> <H3><HR WIDTH="100%">Applet HTML Page<HR WIDTH="100%"></H3> <P> <APPLET codebase="classes" code="applet/MyApplet.class" width=350 height=200 archive="jcommon-1.0.17.jar, jfreechart-1.0.14.jar, sqljdbc4.jar"></APPLET> </P> <HR WIDTH="100%"><FONT SIZE=-1><I>Generated by NetBeans IDE</I></FONT> </BODY> </HTML>The libraries are 3rd-party java (jfreeChart and SQL-JDBC-driver)
解决方案Creating Java applet using external JARS
Add a reference to them to the
archiveattribute of theappletelement.
<APPLET codebase="classes" code="applet/MyApplet.class" width=350 height=200 archive="jcommon-1.0.17.jar, jfreechart-1.0.14.jar, sqljdbc4.jar"></APPLET>Reformatting that gives:
<APPLET codebase="classes" code="applet/MyApplet.class" width=350 height=200 archive="jcommon-1.0.17.jar, jfreechart-1.0.14.jar, sqljdbc4.jar"> </APPLET>
1.
code="applet/MyApplet.class"Should be the fully qualified name of the class. If the class name is
MyAppletand the package isapplet, that translates to:code="applet.MyApplet"
2.
archive="jcommon-1.0.17.jar, jfreechart-1.0.14.jar, sqljdbc4.jar">Just checking, is applet.MyApplet in
jcommon-1.0.17.jar?3.
codebase="classes"That sounds ominous. Is this a full-blown web-app with JSP/servlets? If so, I suspect that path is wrong, in that it is pointing to a place on the server that a client (browser or) applet cannot reach. Try doing a direct fetch (paste the expected address in the browser address bar, and hit 'enter') on each of the applet Jars, if the
MyApplet.classis not in a Jar, do a separate check on the loose class file.这篇关于创建使用外部JAR Java小程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
