全部展开
好吧，这是一个自定义标签
让我先给你看一个例子:
<！-自定义HTML标记->
<！ DOCTYPE html PUBLIC“-// W3C // DTD XHTML 1.0 Transitional // EN”“;>
自定义HTML标记</ title></p>
<p><style type =“ text / css”></p>
<p>huangyu \: 对不起{border: 1px solid #ccc;背景颜色: #efefef;字体粗细: 粗体；}</p>
<p>huangyu \: love {border: 1px solid red;背景颜色: #FFF5F4;字体粗细: 粗体；}</p>
<p></ style></p>
<p></ head></p>
<p><body></p>
<p><huangyu: 对不起>对不起，</ huangyu: 对不起></p>
<p><huangyu: love>！ </ huangyu: love></p>
<p></ body</p>
<p></ html></p>
<p>再次查看:</p>
<p>JSP定制标记的开发简介</p>
<p>简介</p>
<p><img src='http://www.wendangwang.com/pic/ec98b38b7b079e300d015017/6-810-jpg_6-1080-0-0-1080.jpg' alt='pl sql基本语法_jsp语法大全_jsp的基本语法'/></p>
<p>本文将介绍JSP标记的一些基本概念以及如何开发和使用定制标记. 带您进入Java Web开发的另一个新高度.</p>
<p>2. 什么是自定义标签</p>
<p>2.1. 用户定义的Java语言元素实质上是运行一个或两个接口的JavaBean.</p>
<p>2.2. 它可以与JSP的表示逻辑紧密联系<strong><a href='/a/jisuanjixue/article-66767-1.html' title='jsp文件' target='_blank'>jsp</a>的基本语法</strong><strong>jsp的基本语法</strong>，并具有与普通JavaBeans相同的业务逻辑处理能力.</p>
<p>2.3. 当将JSP页面转换为servlet时，介于两者之间的用户定义标签将被处理为称为标签处理程序的对象.</p>
<p>2.4. 您可以操纵默认对象，处理表单数据，访问和其他企业服务.</p>
<p>3. 自定义标签的功能</p>
<p>3.1. 通过调用页面来定制交付.</p>
<p>3.2. 访问JSP页面的所有可能的对象.</p>
<p>3.3. 修改调用页面生成的响应.</p>
<p>3.4. 自定义标签可以相互通信.</p>
<p>3.5. 在同一JSP页面中嵌套标签可以实现复杂的交互.</p>
<p>4. 示例: 开发简单JSP标签的完整示例</p>
<p>4.1. 创建标签描述符文件</p>
<p>在WEB-INF文件下创建* .tld标签描述符文件: 例如</p>
<p><taglib></p>
<p><tlibversion> 1.0 </ tlibversion></p>
<p><jspversion> 1.1 </ jspversion></p>
<p><shortname> eRedLab JSPTag库</ shortname></p>
<p><uri> / testTag </ uri></p>
<p><info>自定义标签测试</ info></p>
<p><tag></p>
<p><img src='http://www.mianfeiwendang.com/pic/fd32e1bc8af6afbe40754a2ebbfbff886fa46003/1-810-jpg_6-1080-0-0-1080.jpg' alt='pl sql基本语法_jsp的基本语法_jsp语法大全'/></p>
<p><名称>你好</名称></p>
<p><tagclass> com.eredlab.taglib.test.TestTld </ tagclass></p>
<p><bodycontent>空</ bodycontent></p>
<p><info>自定义标签测试</ info></p>
<p><属性></p>
<p><name>开始</ name></p>
<p><required> true </ required></p>
<p></ attribute></p>
<p><属性></p>
<p><name>结尾</ name></p>
<p><required> true </ required></p>
<p></ attribute></p>
<p></标签></p>
<p></ taglib></p>
<p>4.2. 创建标签处理程序</p>
<p>/ **</p>
<p>* @desc自定义标签测试类，用于实现简单的Hello World标签</p>
<p>* @author熊春</p>
<p>* @version eRedLab 2007-9-10</p>
<p>* /</p>
<p>公共类TestTld扩展了TagSupport {</p>
<p>//标签的开始属性</p>
<p><img src='http://www.51wendang.com/pic/6d7cc98a0233007ff02bcd97/1-810-jpg_6-1080-0-0-1080.jpg' alt='jsp语法大全_jsp的基本语法_pl sql基本语法'/></p>
<p>私有字符串begin = null;</p>
<p>//标签属性结束</p>
<p>private String end = null;</p>
<p>//构造函数</p>
<p>public TestTld（）{</p>
<p>}</p>
<p>/ *标记初始方法* /</p>
<p>public int doStartTag（）抛出JspTagException {</p>
<p>返回超级. EVAL_BODY_INCLUDE;</p>
<p>}</p>
<p>/ *标记结束方法* /</p>
<p>public int doEndTag（）抛出JspTagException {</p>
<p>JspWriter out = pageContext.getOut（）;</p>
<p>字符串总和=开始+结束;</p>
<p>尝试{</p>
<p>//标签的返回值</p>
<p>out.println（sum）;</p>
<p>}捕获（IOException e）{</p>
<p>e.printStackTrace（）;</p>
<p>}</p>
<p>返回super.SKIP_BODY;</p>
<p>}</p>
<p><img src='http://txt6.book118.com/2016/1216/book70825/70824646.jpg' alt='jsp的基本语法_pl sql基本语法_jsp语法大全'/></p>
<p>/ *发布资源* /</p>
<p>公共无效发布（）{</p>
<p>super.release（）;</p>
<p>}</p>
<p>/ ************************************************** ** p></p>
<p>属性get（），set（）方法</p>
<p>******************************************** / </</p>
<p>}</p>
<p>5. 使用自定义JSP标记</p>
<p>5.1. 将标记描述符文件加载到Web.XML中.</p>
<p><！-加载标记描述符文件-></p>
<p><taglib></p>
<p><taglib-uri> /WEB-INF/test.tld </ taglib-uri></p>
<p><taglib-location> /WEB-INF/test.tld </ taglib-location></p>
<p></ taglib></p>
<p>5.2. 在JSP中使用此标记</p>
<p><％@ taglib uri =“ / testTag”前缀=“ mytag”％></p>
<p><mytag: 你好端=“熊春！” begin =“自定义标签输出流: 您好，” /></p>
<p><mytag: 您好end =“世界！” begin =“嗨，” /></p>
<p>网页的输出如下:</p>
<p>自定义标签输出流: 您好，熊淳！嗨，世界！</p>
<p>图1: JSP页面编写和代码帮助</p>
<p>参考:</p>
<p><br />本文来自<a rel="home" href="http://www.pc-fly.com/" target="_blank">电脑杂谈</a>，转载请注明本文网址：<br />http://www.pc-fly.com/a/jisuanjixue/article-158155-1.html</p>
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