SSM整合

一.pojo

1.基本实体类

Items(商品信息)  

Orderdetail(订单详情)

Orders(订单)

User(用户)

2.自定义扩展类(用以Mapper中映射及参数绑定)

OrdersCustom extends Orders(在订单信息基础上增加所需)

UserCustom extends User(在用户信息基础上增加所需)

public class ItemsQueryVo{

//商品信息

private Items items;

//扩展pojo

private ItemsCustom itemsCustom;

//批量商品信息

private List<ItemsCustom> itemsList;

//用户信息
//private UserCustom userCustom;

}

public class QueryVo{

private Map<String,Object> iteminfo=new HashMap<String,Object>();

private User user;

private UserCustom userCustom;

private List<Integer> ids;

}

二.Dao

public interface UserDao {

//根据id查询用户信息
public User findUserById(int id) throws Exception;

//根据用户名列查询用户列表
public List<User> findUserByName(String name) throws Exception;

//添加用户信息
public void insertUser(User user) throws Exception;

//删除用户信息
public void deleteUser(int id) throws Exception;
}

三.Service

根据id查询商品信息

public ItemsCustom findItemsById(Integer id) throws Exception;

商品修改

public void updateItems(Integer id,ItemsCustom itemsCustom)throws Exception;

四.Controller

 1.返回ModelAndView

@requestMapping(value="/editItems",method=RequestMethod.POST)

public ModelAndView editItems()throws Exception{

ItemsCustom itemsCustom=itemsService.findItemsById(1)

model.addAttribute("itemsCustom",itemsCustom)

}

2.返回string

@requestMapping(value="/editItems",method=RequestMethod.POST)

public String editItems(Model model)throws Exception{

ItemsCustom itemsCustom=itemsService.findItemsById(1);

model.addAttribute("itemsCustom",itemsCustom)

返回视图

return "items/editItems";

重定向

return "redirect:queryItems.action";

转发

return "forward:queryItems.action";

}

返回void

public void editItems(HttpServletRequest request,HttpServletResponse response)throws Exception{

ItemsCustom itemsCustom=itemsService.findItemsById(1);

返回视图

return "items/editItems";

重定向

return "redirect:queryItems.action";

转发

return "forward:queryItems.action";

}

1、使用request转向页面，如下：

request.getRequestDispatcher("页面路径").forward(request, response);

 

2、也可以通过response页面重定向：

response.sendRedirect("url")

 

3、也可以通过response指定响应结果，例如响应json数据如下：

response.setCharacterEncoding("utf-8");

response.setContentType("application/json;charset=utf-8");

response.getWriter().write("json串");

@RequestMapping("/itemsView/{id}")

public @responseBody ItemsCustom itemsView(@PathVariable("id") Integer id)throws Exception{

ItemsCustom itemsCustom=itemsService.findItemsById(id);

return itemsCustom;

}