JSP技术中的开发自定义标签(2)

              JspWriter out = this.pageContext.getOut();
             
              String ip = request.getRemoteAddr();
              try {
                     out.print(ip);
              } catch (IOException e) {
                     throw new RuntimeException(e);
              }
             
             
              return super.doStartTag();
       }
}
 
 
2.在tld文件里面对标签处理器类进行描述，tld文件的位置在web-inf下面可以在tomcat的webapps下面抄一下
 
 
 
<?xml version="1.0" encoding="UTF-8" ?> 
 
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd" 
    version="2.0"> 
    <description>A tag library exercising SimpleTag handlers.</description> 
    <tlib-version>1.0</tlib-version> 
    <short-name>Bird</short-name> 
    <uri>http://www.bird.net</uri>  
    <tag> 
        <name>viewIP</name> 
        <tag-class>com.bird.web.tag.ViewIPTag</tag-class> 
        <body-content>empty</body-content> 
    </tag> 
    </taglib> 
<?xml version="1.0" encoding="UTF-8" ?>
 
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0">