JavaWeb - 模糊查询 + 分页

1. 效果图
   
2. 核心代码（12个一页）

   
   
   	
   
   		
   		
   		
   	
   
   
   
   
   	<%--首页--%>
   	<%--上一页--%>
   	<%--下一页--%>
   	<%--尾页--%>
   
   	
   
   		
   		
   		
   	
   	
   
   		
   		
   		
   	
   	
   
   		
   		
   		
   	
   	
   
   		
   		
   		
   	
   
   	第${curPage}页/共${totalPage}页
   
   
   

   package com.imooc.cart.servlet;
   
   import com.imooc.cart.data.LocalCache;
   import javax.servlet.ServletException;
   import javax.servlet.http.HttpServlet;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   import java.io.IOException;
   
   /**
    * 商品（课程）控制器
    * @version 1.0
    */
   public class ProductServlet extends HttpServlet {
   
       @Override
       protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
   
           String name = req.getParameter("title");
           String pageStr = req.getParameter("page");
           int page = 1;
           if (null != pageStr && !"".equals(pageStr)) {
               page = Integer.parseInt(pageStr);
           }
   
           int totalProducts = LocalCache.getProductsCount(name);
           int totalPage = totalProducts % 12 > 0 ? totalProducts / 12 + 1 : totalProducts / 12;
   
           req.setAttribute("curPage", page);
           req.setAttribute("prePage", page > 1 ? page - 1 : 1);
           req.setAttribute("nextPage", totalPage > page ? page + 1 : totalPage);
           req.setAttribute("totalPage", totalPage);
           req.setAttribute("title", name);
   
           req.setAttribute("products", LocalCache.getProducts(page, 12, name));
           req.getRequestDispatcher("/WEB-INF/views/biz/list.jsp").forward(req, resp);
       }
   }

   package com.imooc.cart.data;
   
   import java.util.ArrayList;
   import java.util.HashMap;
   import java.util.List;
   import java.util.Map;
   
   /**
    * 本地缓存
    * @version 1.0
    */
   public final class LocalCache {
   
       private static Map productMap = new HashMap<>();
       // 省略...
   
       public static List getProducts(int page, int size, String name) {
           List products = new ArrayList<>();
   
           if (null != name && !"".equals(name)) {
               productMap.values().forEach(product -> {
                   if (product.getName().contains(name)) {
                       products.add(product);
                   }
               });
           } else {
               products.addAll(productMap.values());
           }
   
           int start = (page - 1) * size;
           int end = products.size() >= page * size ? page * size : products.size();
           return products.subList(start, end);
       }
   
       public static int getProductsCount(String name) {
           List products = new ArrayList<>();
   
           if (null != name && !"".equals(name)) {
               productMap.values().forEach(product -> {
                   if (product.getName().contains(name)) {
                       products.add(product);
                   }
               });
           } else {
               products.addAll(productMap.values());
           }
           return products.size();
       }
   }

    

3. 待更新...