public class ParseViewIPTag extends TagSupport{
@Override
public int doStartTag() throws JspException {
HttpServletRequest request = (HttpServletRequest) this.pageContext.getRequest();
JspWriter out = this.pageContext.getOut();
String ip = request.getRemoteAddr();
try {
out.print(ip);
} catch (IOException e) {
throw new RuntimeException(e);
}
return super.doStartTag();
}
}
<?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>c</short-name> <uri>http://www.com.cn</uri> <tag> <name>viewIP</name> <tag-class>com.util.ParseViewIPTag</tag-class> <body-content>empty</body-content> </tag> </taglib>
<%@taglib uri="http://www.com.cn" prefix="c" %>
您的ip是:<c:viewIP/>