menubean.java

JSF+Hibernate+Spring三层架构的一个例子

package pizzaria;

import java.util.ArrayList;
import java.util.Iterator;
import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;

public class MenuBean {

  String browsePage = "details.jsp";
  public String getBrowsePage() {
    return browsePage;
  }
  public void setBrowsePage(String page) {
    browsePage = page;
  }
  public String getMenu() {
    // get DatabaseUtil instance 
    FacesContext facesContext = FacesContext.getCurrentInstance();
    ServletContext servletContext = (ServletContext)
    facesContext.getExternalContext().getContext();
    DatabaseUtil dbUtil = (DatabaseUtil)
      servletContext.getAttribute("DATABASE_UTIL");

    StringBuffer buffer = new StringBuffer(512);
    buffer.append("<table>\n");
    ArrayList summaries = dbUtil.getProductSummaries();
    Iterator iterator = summaries.iterator();
    while (iterator.hasNext()) {
      ProductSummary summary = (ProductSummary) iterator.next();
      buffer.append("<tr><td>");
      buffer.append("<a href=\"" + browsePage + "?productId=" +
        summary.getId() + "\">" + summary.getName() + "</a>");
      buffer.append("</td></tr>\n");
    }
    buffer.append("</table>\n");
    return buffer.toString();
  }
}