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| 您的位置:首页>>JSP和Servlet>>实现HtmlEncode功能的Tag |
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实现HtmlEncode功能的Tag
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| 2005-07-19 来源:JavaJia 作者:JavaJia |
详细信息:
以前总在国外的站上看见TagLib，不知道是什么意思，今天总算知道了，它是一种定制的jsp的元素，像
<jsp:xxxxx> 就是一个tag，我试着写了一个HtmlEncode的Tag，还不错，用起来很方便，大家可以先看一下，不久我会写一篇tag教程。
源码如下
//HtmlEncode.java 下载
package lovejsp.tags;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
import lovejsp.*;
/** 这个Tag可以使它的Body中的Html元素按原样显示，即可以实现
* HtmlEncode功能。
* http://lovejsp.com/.
*/
public class HtmlEncode extends BodyTagSupport {
public int doAfterBody() {
BodyContent body = getBodyContent();
String filteredBody =
LovejspTools.encode(body.getString());
try {
JspWriter out = body.getEnclosingWriter();
out.print(filteredBody);
} catch(IOException ioe) {
System.out.println("在HtmlEncode Tag中出现如下错误: " + ioe);
}
return(SKIP_BODY);
}
}
定义TagLib的lovejsp-taglib.tld文件，是XML格式的 下载
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
"http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<!-- a tag library descriptor -->
<taglib>
<!-- after this the default space is
"http://java.sun.com/j2ee/dtds/jsptaglibrary_1_2.dtd"
-->
<tlibversion>1.0</tlibversion>
<jspversion>1.1</jspversion>
<shortname>lovejsp</shortname>
<uri></uri>
<info>
A tag library from Lovejsp.site
http://lovejsp.com/.
</info>
<tag>
<name>HtmlEncode</name>
<tagclass>lovejsp.tags.HtmlEncode</tagclass>
<info>HtmlEcode the TagBody</info>
<!-- TOMCAT 3.1 DOES NOT SUPPORT BODYCONTENT
<bodycontent>JSP</bodycontent> -->
</tag>
</taglib>
使用Tag的encode.jsp文件 下载
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Example for lovejsp.tags.HtmlEncode Tag From LoveJSP.site(lovejsp.com)</TITLE>
</HEAD>
<BODY>
<H1>ok,Let"s Go!!</H1>
(Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0))
renders the HTML 4.0 logical character styles:
<P>
<TABLE BORDER=1 ALIGN="CENTER">
<TR CLASS="COLORED"><TH>Example<TH>Result
<TR>
<TD><PRE>
<EM>Some emphasized text.</EM><BR>
<STRONG>Some strongly emphasized text.</STRONG><BR>
<CODE>Some code.</CODE><BR>
<SAMP>Some sample text.</SAMP><BR>
<KBD>Some keyboard text.</KBD><BR>
<DFN>A term being defined.</DFN><BR>
<VAR>A variable.</VAR><BR>
<CITE>A citation or reference.</CITE>
</PRE>
<TD>
<EM>Some emphasized text.</EM><BR>
<STRONG>Some strongly emphasized text.</STRONG><BR>
<CODE>Some code.</CODE><BR>
<SAMP>Some sample text.</SAMP><BR>
<KBD>Some keyboard text.</KBD><BR>
<DFN>A term being defined.</DFN><BR>
<VAR>A variable.</VAR><BR>
<CITE>A citation or reference.</CITE>
</TABLE>
</BODY>
</HTML> |
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