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	<title>lizongbo at 618119.com &#187; jsp</title>
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		<title>Windows下编写google app engine jsp出现中文乱码问题的真正原因</title>
		<link>http://618119.com/archives/2009/04/12/148.html</link>
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		<pubDate>Sun, 12 Apr 2009 04:54:52 +0000</pubDate>
		<dc:creator>lizongbo</dc:creator>
				<category><![CDATA[Java]]></category>
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		<category><![CDATA[Google App Engine]]></category>
		<category><![CDATA[jsp]]></category>
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		<description><![CDATA[Windows下编写google app engine jsp出现中文乱码问题的真正原因，是com.google.appengine.tools.admin.Application里启动javac没加-encoding参数导致. 在Linux下，因为一般都是LANG=zh_CN.UTF-8，因此就不会遇到这个问题了。 Windows下一般是取的默认的file.encoding为GBK，因此根据jsp生成的class文件就是乱码内容了。 验证流程如下： 1.首先重命名E:\Java\appengine-java-sdk-1.2.0\lib\shared\jsp\jasper-compiler-5.0.28.jar为 jasper-compiler-5.0.28.jar.bak。 然后在E:\Java\appengine-java-sdk-1.2.0\bin下运行 appcfg update E:\Java\workspace\testwe\war。 这个时候在命令行下会看到如下的出错信息。 E:\Java\appengine-java-sdk-1.2.0\bin&#62;java -cp &#8220;E:\Java\appengine-java-sdk-1.2.0\bin\\..\lib\appengine-tools-api.jar&#8221; com.google.appengine.tools.admin.AppCfg update e:\Java\workspace\testweb\war Reading application configuration data&#8230; 2009-04-12 03:05:34.240::INFO:  Logging to STDERR via org.mortbay.log.StdErrLog Beginning server interaction for lizongbo&#8230; 0% Creating staging directory 5% Scanning for jsp files. 8% Compiling jsp files. Exception in thread &#8220;main&#8221; java.lang.NoClassDefFoundError: org/apache/jasper/JspC [...]]]></description>
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		<title>jsp拦截JspWriter实现类似php的ob_get_contents</title>
		<link>http://618119.com/archives/2009/04/06/144.html</link>
		<comments>http://618119.com/archives/2009/04/06/144.html#comments</comments>
		<pubDate>Mon, 06 Apr 2009 14:29:55 +0000</pubDate>
		<dc:creator>lizongbo</dc:creator>
				<category><![CDATA[cache]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[jsp]]></category>
		<category><![CDATA[JspWriter]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[缓存]]></category>

		<guid isPermaLink="false">http://618119.com/?p=144</guid>
		<description><![CDATA[jsp拦截JspWriter实现类似php的ob_get_contents php可以通过ob_start和ob_get_contents可以拦截并得到echo等方式输出的内容，并可以方便的进行二次处理。java的jsp也是可以非常方便就实现这样的功能，那就是实现一个自定义的JspWriter. oscache的功能强大的jsp缓存标签就是这样干的。 前段时间作了个简单的rss输出，由于避免访问量过大影响到数据库和接口调用。 于是需要对生成的rss文本进行缓存。原有的jsp代码都已经写好，大概动就太麻烦了，于是用TextJspWriter继承javax.servlet.jsp.JspWriter，然后在jsp作小改造就搞定了。 php的用法参考： http://cn2.php.net/ob_get_contents TextJspWriter.java的代码为： [code] package com.lizongbo.util; import java.io.IOException; import java.io.StringWriter; import javax.servlet.jsp.JspWriter; public class TextJspWriter extends JspWriter { public String getString() { return sb.toString(); } private StringBuilder sb = null; public TextJspWriter() { this(8192, true); } public TextJspWriter(int bufferSize, boolean autoFlush) { super(bufferSize, autoFlush); sb=new StringBuilder(bufferSize); } @Override public void [...]]]></description>
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