标签：end logs log writer copy pack void override blog
1）最简单的标签库
1，继承Tag接口，重写doEndTag()方法,返回类型不同后面流程不一样
想要jsp的内容必须重写了setPageContent（）方法
再JspWriter out = pageContent.getOut();
package myTag; import java.io.IOException; import java.util.ResourceBundle; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; import javax.servlet.jsp.tagext.Tag; public class Copyright implements Tag { private PageContext pageContext; private Tag parent; @Override public int doEndTag() throws JspException { // TODO Auto-generated method stub JspWriter out = pageContext.getOut(); try { out.println("<div align=center style=‘line-height:22px;" + "font-size:12px;‘>"); out.println(ResourceBundle.getBundle("copyright").getString( "copyright")); out.println("</div>"); } catch (IOException e) { throw new JspException(e); } return EVAL_PAGE; } @Override public int doStartTag() throws JspException { // TODO Auto-generated method stub return SKIP_BODY; } @Override public Tag getParent() { // TODO Auto-generated method stub return this.parent; } @Override public void release() { // TODO Auto-generated method stub } @Override public void setPageContext(PageContext pc) { // TODO Auto-generated method stub this.pageContext = pc; } @Override public void setParent(Tag t) { // TODO Auto-generated method stub this.parent = t; } }
2,在WEB-INF/目录下创建tld文件（new/other创建
bodycontent有三个值，empty表示不可以有标签体，jsp表示可以有标签体，tagdependent可以有但不会执行
<taglib> <tlib-version>1.0</tlib-version> <jsp-version>1.2</jsp-version> <short-name>taglib</short-name> <tag> <name>copyright</name> <tagclass>myTag.Copyright</tagclass> <bodycontent>JSP</bodycontent> </tag> </taglib>
3，由于我用了资源文件
ResourceBundle.getBundle("copyright").getString("copyright")
所以src文件下一定要有这个文件的copyright属性
4，在jsp中首先声明，<%@ taglib uri="WEB-INF/xxx.tld" prefix="taglib">
下面就可以<taglib:copyright/>
标签：end logs log writer copy pack void override blog
原文地址：http://www.cnblogs.com/vhyc/p/6626756.html
