productformcontroller.java

Struts数据库项目中的一个实例

package com.relationinfo.webapp.action;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import com.relationinfo.model.Product;
import com.relationinfo.service.Manager;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;

public class ProductFormController extends BaseFormController {
    private Manager manager = null;

    public void setManager(Manager manager) {
        this.manager = manager;
    }

    protected Object formBackingObject(HttpServletRequest request)
    throws Exception {
        String productid = request.getParameter("productid");
        Product product = null;

        if (!StringUtils.isEmpty(productid)) {
            product = (Product) manager.getObject(Product.class, new String(productid));
        } else {
            product = new Product();
        }

        return product;
    }

    public ModelAndView onSubmit(HttpServletRequest request,
                                 HttpServletResponse response, Object command,
                                 BindException errors)
    throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("entering 'onSubmit' method...");
        }

        Product product = (Product) command;
        boolean isNew = (product.getProductid() == null);
        Locale locale = request.getLocale();

        if (request.getParameter("delete") != null) {
            manager.removeObject(Product.class, product.getProductid());

            saveMessage(request, getText("product.deleted", locale));
        } else {
            manager.saveObject(product);

            String key = (isNew) ? "product.added" : "product.updated";
            saveMessage(request, getText(key, locale));

            if (!isNew) {
            	return new ModelAndView("redirect:editProduct.html", "productid", product.getProductid());
            }
        }

        return new ModelAndView(getSuccessView());
    }
}