springmvc+spring+mybatis分页查询实例版本1,ver1.0

无聊做做看看,几乎没有怎么仔细做过这方面的,总是以为很简单,想想就会,实际做起来结合工作经验感觉还是挺有收获的,可以用在自己的项目上

第一版本思路:框架使用ssm,这个无所谓,采用分页语句查询指定页面的数据,根据数据记录总数,页面显示记录数计算有多少页,每次提交后计算当前页显示的上标和下标,然后进行分页查询,功能实现了,效果不满意,代码贴上,接口就不贴了,直接上接口的实现类,数据根据sql语句自己造吧

package com.mi.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.mi.form.PageTableForm;
import com.mi.service.impl.UserInfoServiceImpl;

@Controller
@RequestMapping("/user")
public class UserInfoCotroller {

    @Autowired
    private UserInfoServiceImpl userInfoServiceImpl;

    private PageTableForm pageTableForm;

    @RequestMapping("/init")
    public String init(Model model) {
        pageTableForm = new PageTableForm();
        return "redirect:/user/query.do";
    }

    @RequestMapping("/query")
    public String queryUserInfo(Model model, PageTableForm pageTableForm) {
        int currentPage = pageTableForm.getCurrentPage() == 0 ? 1 : pageTableForm.getCurrentPage();
        pageTableForm.setCurrentPage(currentPage);
        pageTableForm = userInfoServiceImpl.queryUserInfo(pageTableForm);
        model.addAttribute("pageTableForm", pageTableForm);
        return "userInfo";
    }

    public UserInfoServiceImpl getUserInfoServiceImpl() {
        return userInfoServiceImpl;
    }

    public void setUserInfoServiceImpl(UserInfoServiceImpl userInfoServiceImpl) {
        this.userInfoServiceImpl = userInfoServiceImpl;
    }

    public PageTableForm getPageTableForm() {
        return pageTableForm;
    }

    public void setPageTableForm(PageTableForm pageTableForm) {
        this.pageTableForm = pageTableForm;
    }

}

package com.mi.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.mi.dao.UserInfoMapper;
import com.mi.entity.User;
import com.mi.form.PageTableForm;
import com.mi.service.UserInfoService;

@Service("userInfoService")
public class UserInfoServiceImpl implements UserInfoService {

    @Autowired
    private UserInfoMapper userInfoMapper;

    private List<User> userList;
    @Override
    public PageTableForm queryUserInfo(PageTableForm pageTableForm) {
        pageTableForm = getOperation(pageTableForm);
        int beginIndex = pageTableForm.getBeginIndex();
        //int endIndex = pageTableForm.getEndIndex();
        userList = userInfoMapper.queryUserInfo(beginIndex);
        pageTableForm.setUserList(userList);
        return pageTableForm;
    }

    public PageTableForm getOperation(PageTableForm pageTableForm) {
        pageTableForm.setUserCount(getCount());
        if (pageTableForm.getUserCount() % 3 == 0) {
            pageTableForm.setPageCount(pageTableForm.getUserCount() / pageTableForm.getPageSize());
        } else {
            pageTableForm.setPageCount(pageTableForm.getUserCount() / pageTableForm.getPageSize() + 1);
        }

        pageTableForm.setBeginIndex(pageTableForm.getCurrentPage() * 3 - 3);
    //    pageTableForm.setEndIndex(pageTableForm.getCurrentPage() * 3);

        return pageTableForm;
    }

    public UserInfoMapper getUserInfoMapper() {
        return userInfoMapper;
    }
    public void setUserInfoMapper(UserInfoMapper userInfoMapper) {
        this.userInfoMapper = userInfoMapper;
    }

    @Override
    public int getCount() {
        return userInfoMapper.getCount();
    }

    public List<User> getUserList() {
        return userList;
    }

    public void setUserList(List<User> userList) {
        this.userList = userList;
    }

}

package com.mi.dao;

import java.util.List;

import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import com.mi.entity.User;

@Repository("userInfoMapper")
public interface UserInfoMapper {

    public List<User> queryUserInfo(@Param("beginIndex") int beginIndex);

    public int getCount();
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mi.dao.UserInfoMapper">

    <select id="queryUserInfo" resultType="com.mi.entity.User">
        SELECT id,user_name userName,age FROM user_t where 1=1 limit #{beginIndex},3
    </select>

    <select id="getCount" resultType="int">
        SELECT count(*) FROM user_t
    </select>
    <!-- <insert id="addUser" parameterType="com.mi.entity.User"
        flushCache="true">
        INSERT INTO user_t (id,user_name,password,age) VALUES
        (#{id},#{userName},#{password},#{age})
    </insert>

    <delete id="deleteUser" parameterType="com.mi.entity.User" flushCache="true">
        DELETE FROM user_t where id=#{id}
    </delete>

    <update id="updateUser" parameterType="com.mi.entity.User" flushCache="true">
        UPDATE user_t SET user_name = 'zzxy' WHERE id=#{id}
    </update> -->

</mapper>

package com.mi.form;

import java.util.List;

import com.mi.entity.User;

public class PageTableForm {

    private int currentPage;// 当前页
    private int pageSize = 3;// 每页记录数
    private int beginIndex;// 开始位置
    private int endIndex;// 结束位置
    private int pageCount;// 共多少页
    private int userCount;// 共多少条记录

    private List<User> userList;

...省略get set
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript"
    src="<%=request.getContextPath()%>/js/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
    $(function() {
        $("#prev").click(
                function() {
                    var currentPage = parseInt($("#currentPage").val()) - 1;
                    $("#currentPage").val(currentPage);
                    $("#form0").submit();
                })

        $("#next").click(
                function() {
                    var currentPage = parseInt($("#currentPage").val()) + 1;
                    $("#currentPage").val(currentPage);
                    $("#form0").submit();
                })
    })
</script>
</head>
<body>
    <form action="${pageContext.request.contextPath}/user/query.do" id="form0" method="POST">
        <table border="1">
            <thead>
                <tr>
                    <td width="60px">id</td>
                    <td width="120px">name</td>
                    <td width="60px">age</td>
                </tr>
            </thead>
            <tbody>
                <c:forEach var="user" items="${pageTableForm.userList}" varStatus="status">
                    <tr>
                        <td>${user.id}</td>
                        <td>${user.userName}</td>
                        <td>${user.age}</td>
                    </tr>
                </c:forEach>
                <tr>
                    <td><c:if test="${pageTableForm.currentPage > 1}">
                            <input id="prev" type="button" value="上一页">
                        </c:if></td>
                    <td>当前<label>${pageTableForm.currentPage}</label>页/共<label>${pageTableForm.pageCount}</label>页</td>
                    <td><c:if test="${pageTableForm.currentPage < pageTableForm.pageCount}">
                            <input id="next" type="button" value="下一页">
                        </c:if></td>
                </tr>

            </tbody>
        </table>
        <input id="currentPage" type="hidden" name="currentPage" value="${pageTableForm.currentPage}">
    </form>
</body>
</html>

最终效果:

每次都会提交一次请求,比较差强人意,下个版本计划用js实现,拒绝垃圾代码