标签：data des sde package sign ini servlet nav head
先看下最终效果：
源码地址：https://github.com/zhouyu629/freemarker-page-demo
<!--web组件--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--lombok简化实体类的get set方法--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <!-- freemarker--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency>
spring: application: name: demo freemarker: allow-request-override: true cache: false check-template-location: true charset: UTF-8 content-type: text/html; charset=utf-8 expose-request-attributes: false expose-session-attributes: false expose-spring-macro-helpers: false suffix: .ftl template-loader-path: classpath:/templates settings: number_format: 0 # freemarker会自动将整型数字转换为千位分隔，不方便 http: encoding: charset: utf-8 force: true server: port: 8088
构造方法里，将页码、分页大小等传进去，自动计算总页数。
package com.demo.util; import lombok.Data; import java.util.List; /** * @program: zyproject * @description: 分页通用实体类 * @author: zhouyu(zhouyu629 # qq.com) * @create: 2020-02-16 **/ @Data public class MyPager<T> { private int page; //当前页码，从1开始 private int pagesize; //分页大小 private int totalpages; //总页数 private int totalrecords; //总记录数 private List<T> list; //构造函数中计算总页数 public MyPager(int page, int pagesize, int totalrecords, List<T> list){ this.page = page; this.pagesize = pagesize; this.totalrecords = totalrecords; this.list = list; //计算总页数 this.totalpages = totalrecords/pagesize; if(totalrecords%pagesize!=0){ this.totalpages = this.totalpages + 1; }; } }
顺便再创建一个实体类供测试，直观一点，用hasmap也行。
package com.demo.util; import lombok.Data; /** * @program: freemarker-page-demo * @description: 用户实体 * @author: zhouyu(zhouyu629 # qq.com) * @create: 2020-03-07 **/ @Data public class UserEntity { private Integer user_id; private String user_name; private Integer age; private String login_name; private String mail; }
实际应用中，pagesize可以写到配置文件或数据库中，允许全局变更。
数据源list也应该从数据层获取。
package com.demo.controller; import com.demo.util.MyPager; import com.demo.util.UserEntity; import com.sun.org.apache.xpath.internal.operations.Mod; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * @program: freemarker-page-demo * @description: demo首页 * @author: zhouyu(zhouyu629 # qq.com) * @create: 2020-03-06 **/ @Controller public class IndexController { @RequestMapping("/index.html") public String index(@RequestParam(name = "page",defaultValue = "1") Integer page, @RequestParam(name = "pagesize",defaultValue = "10") Integer pagesize, Map<String,Object> map){ //造一些分页数据 List<UserEntity> list = new ArrayList<>(); for(int i = ((page-1)*pagesize+1);i<((page-1)*pagesize+pagesize);i++){ UserEntity userEntity = new UserEntity(); userEntity.setAge(20); userEntity.setLogin_name("user"+i); userEntity.setMail("user"+i+"@gmail.com"); userEntity.setUser_id(i); userEntity.setUser_name("user"+i); list.add(userEntity); } MyPager myPager = new MyPager(page,pagesize,500,list); map.put("users",myPager); return "/index"; } }
<#-- 参数解释： page：当前页码，从1开始 pagesize:分页大小 totalpages：总页数。也可以放到模板里计算。这里在MyPager类里已计算过了。 totalrecords：总记录数 url：链接地址，自动拼接page参数。为了简单，没有判断当前页面是否有get参数了，直接做了&连接，默认认为原来就有参数。当前你也可以用servlet自己获取当前url及参数，就不用传了。 以上这些参数除url外均可以从MyPager实例中获取。其实可以直接把mypager实例传进来，为了便于以后扩展，分字段传过来。 --> <#macro fpage page pagesize totalpages totalrecords url> <li class="page-item"><span class="page-link">共条${totalrecords}记录 第${page}页/共${totalpages}页</span></li> <#--startpage:起始页码就是page，endpage:结束页码，showfirstpage是否显示首页按钮，showlastpage：是否显示末页按钮，showpre是否显示前...，shownext是否显示后...--> <#assign startpage = page,endpage=10,showfirstpage=false,showlastpage=false,showpre=false,shownext=false,prepage = 1,nextpage=11> <#--是否显示首页按钮及计算初始页码--> <#if page gt 1> <#assign showfirstpage = true> <#--startpage向前挪4页，如果不足4页，则startpage=1--> <#assign startpage=(page-4)> <#if startpage lte 0> <#assign startpage = 1> </#if> </#if> <#--是否显示前n页的...，以及...的链接--> <#if page gt 5> <#assign showpre = true,prepage=page-5> </#if> <#--计算endpage--> <#if page+pagesize-1 lt totalpages> <#assign endpage = page+pagesize-1> <#--显示后面的...按钮--> <#assign shownext = true> <#--后面...的页面码--> <#assign nextpage=page+pagesize> <#--显示末页--> <#assign showlastpage = true> <#else> <#assign endpage = totalpages> </#if> <#if endpage lte 0> <#assign endpage = 1> </#if> <#--开始展示--> <#--首页--> <#if showfirstpage> <li class="page-item"><span><a class="page-link" href="${url}&page=1">首页</a></span></li> </#if> <#--前面的...--> <#if showpre> <li class="page-item"><span><a class="page-link" href="${url}&page=${prepage}">...</a></span></li> </#if> <#--显示的页码按钮--> <#list startpage..endpage as p> <li class="page-item <#if p == page>active</#if>"><span><a class="page-link" href="${url}&page=${p}">${p}</a></span></li> </#list> <#--后面的...--> <#if shownext> <li class="page-item"><span><a class="page-link" href="${url}&page=${nextpage}">...</a></span></li> </#if> <#--显示尾页--> <#if showlastpage> <li class="page-item"><span><a class="page-link" href="${url}&page=${totalpages}">末页</a></span></li> </#if> </#macro>
核心是这一段，根据后台传过来的MyPager实例users，调用freemarker宏，传递相关参数：
<#import "./public/page.ftl" as fpage /> <@fpage.fpage page=users.page pagesize=users.pagesize totalpages=users.totalpages totalrecords=users.totalrecords url="index.html?key=" />
完整html代码
<!doctype html> <html lang="en"> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <!-- Bootstrap CSS --> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous"> <title>Hello, world!</title> </head> <body> <div class="container-fluid"> <div class="row"> <div class="col-sm"> <table class="table"> <thead class="thead-dark"> <tr> <th scope="col">id</th> <th scope="col">登录名</th> <th scope="col">姓名</th> <th scope="col">mail</th> <th scope="col">年龄</th> </tr> </thead> <tbody> <#list users.list as list> <tr> <th scope="row">${list.user_id}</th> <td>${list.login_name}</td> <td>${list.user_name}</td> <td>${list.mail}</td> <td>${list.age}</td> </tr> </#list> </tbody> </table> <!--pager--> <nav aria-label="Page navigation example"> <ul class="pagination"> <#import "./public/page.ftl" as fpage /> <@fpage.fpage page=users.page pagesize=users.pagesize totalpages=users.totalpages totalrecords=users.totalrecords url="index.html?key=" /> </ul> </nav> </div> </div> . </div> <!-- Optional JavaScript --> <!-- jQuery first, then Popper.js, then Bootstrap JS --> <script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script> </body> </html>
打完收功!
freemarker自定义分页（springboot、bootstrap4）
标签：data des sde package sign ini servlet nav head
原文地址：https://www.cnblogs.com/zhouyu629/p/12433259.html
