?? lookupaction.java
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package ch03;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import ch08.WileyActionMapping;public class LookupAction extends Action { protected Double getQuote(String symbol) { if ( symbol.equalsIgnoreCase("SUNW") ) { return new Double(25.00); } return null; } public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String theMapping = mapping.getClass().toString(); WileyActionMapping wileyMapping = (WileyActionMapping)mapping; Double price = null; String symbol = null; // Default target to success String target = new String("success"); if ( form != null ) { LookupForm lookupForm = (LookupForm)form; symbol = lookupForm.getSymbol(); price = getQuote(symbol); } // if price is null, set the target to failure if ( price == null ) { target = new String("failure"); } else { boolean logging = wileyMapping.getLogResults(); if ( logging ) { System.err.println("SYMBOL:" + symbol + " PRICE:" + price); } request.setAttribute("PRICE", price); } // Forward to the appropriate View return (mapping.findForward(target)); }}?? 快捷鍵說明
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