发布时间：2019-07-29 18:15:38
<table>
<tr>
<td>商品编号</td>
<td>商品名称</td>
<td style="text-align: center;">操作</td>
</tr>
<c:forEach items="${list}" var="product">
<tr>
<td>${product.id}</td><td>${product.name}</td>
<td>
<a href="${pageContext.request.contextPath }/delete?id=${product.id}">删除</a>
<a>|</a>
<a href="${pageContext.request.contextPath }/toupdate?id=${product.id}">更新</a>
</td>
</tr>
</c:forEach>
</table>
public class ProductAction {
private ProductService productService=new ProductServiceImpl();
HttpServletRequest request=ServletActionContext.getRequest();
HttpServletResponse response=ServletActionContext.getResponse();
public Product product=new Product();
public String findList(){
List<Product> list=productService.findList();
request.setAttribute("list", list);
return "list";
}
public String delete(){
int id=Integer.parseInt(request.getParameter("id"));
productService.deleteProduct(id);
return "del";
}
public String add(){
int id=Integer.parseInt(request.getParameter("id"));
String name=request.getParameter("name");
Product product=new Product(id,name);
productService.addProduct(product);
return "add";
}
public String toupdate(){
int id=Integer.parseInt(request.getParameter("id"));
Product product=productService.findById(id);
request.setAttribute("product", product);
return "toupdate";
}
public String update(){
int id=Integer.parseInt(request.getParameter("id"));
String name=request.getParameter("name");
Product product=new Product(id,name);
productService.updateProduct(product);
return "update";
}
}
为什么获取不到数据库的值