效果图核心代码（12个一页） <!-- 搜索 -->
<form id="searchForm" method="post" action="/product/list.do">
<div class="search">
<input type="hidden" name="page" value="1">
<input type="text" name="title" class="search_input" value="${title}">
<input type="submit" class="search_submit" value="">
</div>
</form>
<!-- 分页 -->
<div>
<%--<a href="/product/list.do?page=1">首页</a>--%>
<%--<a href="/product/list.do?page=${prePage}">上一页</a>--%>
<%--<a href="/product/list.do?page=${nextPage}">下一页</a>--%>
<%--<a href="/product/list.do?page=${totalPage}">尾页</a>--%>
<form method="post" action="/product/list.do" style="display: inline">
<input type="hidden" name="page" value="1">
<input type="hidden" name="title" value="${title}">
<input type="submit" value="首页" class="btn">
</form>
<form method="post" action="/product/list.do" style="display: inline">
<input type="hidden" name="page" value="${prePage}">
<input type="hidden" name="title" value="${title}">
<input type="submit" value="上一页" class="btn">
</form>
<form method="post" action="/product/list.do" style="display: inline">
<input type="hidden" name="page" value="${nextPage}">
<input type="hidden" name="title" value="${title}">
<input type="submit" value="下一页" class="btn">
</form>
<form method="post" action="/product/list.do" style="display: inline">
<input type="hidden" name="page" value="${totalPage}">
<input type="hidden" name="title" value="${title}">
<input type="submit" value="尾页" class="btn">
</form>
第${curPage}页/共${totalPage}页
</div>
<!-- 响应内容省略 --> 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<Long, Product> productMap = new HashMap<>();
// 省略...
public static List<Product> getProducts(int page, int size, String name) {
List<Product> 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<Product> 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();
}
}
待更新...
