JSP+Servlet+Tomcat+Mysql实现注册、登陆、修改、添加、查看、分页实例之----分页操作

Java Servlet 分页实现

最新推荐文章于 2021-01-19 06:16:43 发布

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本文介绍了一种使用Java Servlet实现网站内容分页的方法。通过PageServlet处理请求参数，获取指定范围的数据，并将其转发到main.jsp页面进行显示。该方法包括首页、上一页、下一页和末页导航。

1、java servlet分页操作

2、main.jsp页面

                <tr>
                    <td colspan="9" align="center">
                        <a href="/page?start=0">[首  页]</a>  |
                        <a href="/page?start=${pre}">[上一页]</a>   |
                        <a href="/page?start=${next}">[下一页]</a>   |
                        <a href="/page?start=${last}">[末  页]</a>
                    </td>
                </tr>

3、PageServlet

package com.servlet.bbs;

import com.dao.BbsDao;
import com.entity.BbsEntity;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

/**
 * 分页
 * Created by lvjun on 2018-03-22.
 */
@WebServlet(name = "PageServlet")
public class PageServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html; charset=UTF-8");
        int start = 0;
        int count = 10;
        try {
            start = Integer.parseInt(request.getParameter("start"));
        } catch (NumberFormatException e) {
        }

        int next = start + count;
        int pre = start - count;
        int total = new BbsDao().GetTotal();
        int last;
        if (0 == total % count)
            last = total - count;
        else
            last = total - total % count;
        pre = pre < 0 ? 0 : pre;
        next = next > last ? last : next;

        request.setAttribute("total", total);
        request.setAttribute("last", last);
        request.setAttribute("next", next);
        request.setAttribute("pre", pre);

        List<BbsEntity> list = new BbsDao().GetPageList(start, count);
        request.setAttribute("list", list);
        request.getRequestDispatcher("/main.jsp").forward(request, response);
    }
}