userinfotag.java

一个java工作流引擎

package org.jbpm.web.tag;

import java.io.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import org.jbpm.web.struts.action.*;

public class UserInfoTag extends TagSupport {

	public int doStartTag() throws JspException {
    JspWriter jspOut = pageContext.getOut();
    
    try {
      String user = Authentication.getUser( (HttpServletRequest) pageContext.getRequest() );
      jspOut.println( "you are " + user + " | <a href=\"index.jsp\">log out</a>" );
      
    } catch (SecurityException e) {
      throw new JspException( e.getMessage() ); 
    } catch (IOException e) {
      e.printStackTrace();
      throw new JspException( "table couldn't be displayed : " + e.getMessage() );
    }
    return EVAL_BODY_INCLUDE;
  }

}