lowercasetag.java

J2EE指南

package book.simpletasks;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.io.IOException;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public class LowerCaseTag extends BodyTagSupport 
{
      public int doAfterBody()throws JspException
       {
         try {
                BodyContent body = getBodyContent();
                JspWriter writer = body.getEnclosingWriter(); 
                String bodyString = body.getString();
                      if ( bodyString != null ) 
						  {
                              writer.print( bodyString.toLowerCase()); 
                          }
             } catch(IOException ioe)
				{
                     throw new JspException("Error: IOException while writing to the user");
                }
                        return SKIP_BODY; 
}

}