java+springBoot+Thymeleaf+vue分页组件的定义
导读
本篇着重介绍java开发环境下,如何写一个vue分页组件,使用到的技术点有java、springBoot、Thymeleaf等;
分页效果图
名称为vuepagerbasic的分页组件,只包含上一页、下一页,本篇着重介绍vuepager分页组件
前台html,使用到Thymeleaf模板
在layout.html文件里定义与注册分页组件
<div th:fragment="vuepagerbasic"> <template id="vuePagerBasic"> <div> <a href="javascript:;" class="bd0" v-on:click="go(1)" v-if="pages.pageIndex>1"><<</a> <a href="javascript:;" v-on:click="go(pages.pageIndex-1)" v-if="pages.pageIndex>1"><</a> <span v-if="pages.previousSpot" v-on:click="go(pages.firstNum-1)">...</span> <a href="javascript:;" v-for="item in pages.pageList" v-bind:class="{cur:pages.pageIndex==item}" v-on:click="go(item)">{{item}}</a> <span v-if="pages.nextSpot" v-on:click="go(pages.lastNum+1)">...</span> <a href="javascript:;" v-if="pages.pageIndex < pages.totalPages" v-on:click="go(pages.pageIndex+1)">></a> <a href="javascript:;" class="bd0" v-if="pages.pageIndex < pages.totalPages" v-on:click="go(pages.totalPages)">>></a> </div> </template> <script type="text/javascript"> Vue.component('vuepagerbasic', { template: '#vuePagerBasic', props: ['url', 'prop'], data: function () { return { pages: [], } }, mounted: function () { this.go(1); }, methods: { go: function (n) { this.getData(n); }, getData: function (n) { this.prop = this.prop || {}; this.prop.pageIndex = n; var me = this; axios.post(this.url, this.prop).then(function (res) { me.pages = res.data.pages; console.log("me.pages:" + me.pages); me.$emit("getdata", res.data.rows); }); } } }); </script> </div> <div th:fragment="vuepager"> <template id="vuePager"> <div class="page tc"> <a href="javascript:;" v-on:click="go(1)" v-if="pages.pageIndex>1">首页</a> <a href="javascript:;" v-on:click="go(pages.pageIndex-1)" v-if="pages.pageIndex>1">上一页</a> <span v-if="pages.previousSpot" v-on:click="go(pages.firstNum-1)">...</span> <span href="javascript:;" v-for="item in pages.pageList" v-bind:class="{current:pages.pageIndex==item}" v-on:click="go(item)">{{item}}</span> <span v-if="pages.nextSpot" v-on:click="go(pages.lastNum+1)">...</span> <a href="javascript:;" v-if="pages.pageIndex < pages.totalPages" v-on:click="go(pages.pageIndex+1)">下一页</a> <a href="javascript:;" v-if="pages.pageIndex < pages.totalPages" v-on:click="go(pages.totalPages)">尾页</a> </div> </template> <script> Vue.component('vuepager', { template: '#vuePager', props: ['url', 'prop'], data: function () { return { pages: [], } }, mounted: function () { this.go(1); }, methods: { go: function (n) { this.getData(n); }, getData: function (n) { this.prop = this.prop || {}; this.prop.pageIndex = n; var me = this; axios.post(this.url, this.prop).then(function (res) { me.pages = res.data.pages; me.$emit("getdata", res.data.rows); }); } } }); </script> </div>
后台PagedHelper.java
用于计算分页等,暂未优化;
import java.io.Serializable; import java.util.ArrayList; import java.util.Comparator; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; public class PagedHelper extends LinkedHashMap<String, Object> implements Serializable { /** * */ private static final long serialVersionUID = 1L; public boolean isPreviousSpot() { return previousSpot; } public void setPreviousSpot(boolean previousSpot) { this.previousSpot = previousSpot; } public boolean isNextSpot() { return nextSpot; } public void setNextSpot(boolean nextSpot) { this.nextSpot = nextSpot; } public int getFirstNum() { return firstNum; } public void setFirstNum(int firstNum) { this.firstNum = firstNum; } public int getLastNum() { return lastNum; } public void setLastNum(int lastNum) { this.lastNum = lastNum; } public int getShowPageNum() { return showPageNum; } public void setShowPageNum(int showPageNum) { this.showPageNum = showPageNum; } public long getTotal() { return total; } public void setTotal(long total) { this.total = total; } public int getTotalPages() { this.totalPages=(int)Math.ceil((double)total / pageSize); return totalPages; } public int getPageIndex() { return pageIndex; } public void setPageIndex(int pageIndex) { this.pageIndex = pageIndex; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } /* * public List<Integer> getPageList() { return pageList; } */ public void setPageList(List<Integer> pageList) { this.pageList = pageList; } // 前面的点,前面省略的页数用.来代表, private boolean previousSpot; // 后面的点,后面省略的页数用.来代表, private boolean nextSpot; // 第一个页数,一般都是1 private int firstNum; // 最后一个页数,也就是最大页数 private int lastNum; // 默认页面显示最多页号数目 private int showPageNum; // 总记录数 private long total; // 总页数 public int totalPages; // 当前页 private int pageIndex; // 每页大小 private int pageSize; // 页数列表,此列表中包含第一页和最后一页 private List<Integer> pageList ; //返回的数据记录 private List<?> rows; public List<Integer> getPagelist() { List<Integer> p = new ArrayList<Integer>(); if (totalPages <= showPageNum)//全部显示 { for (int i = 1; i <= totalPages; i++) { p.add(i); } } else { int halfOfPageNum = ((int)((showPageNum + 1) / 2)) - 1;//前后保留页数大小 if (pageIndex - halfOfPageNum > 1 && pageIndex + halfOfPageNum < totalPages) { //两头都可取值 this.previousSpot = this.nextSpot = true; for (int i = pageIndex - halfOfPageNum; i <= pageIndex + halfOfPageNum; i++) { p.add(i); } } else if (pageIndex - halfOfPageNum > 1) { //右头值少 this.previousSpot = true; for (int i = totalPages ; i >= totalPages - showPageNum + 1; i--) { p.add(i); } } else if (pageIndex - halfOfPageNum <= 1) { //左头值少 this.nextSpot = true; for (int i = 1; i <= showPageNum; i++) { p.add(i); } } this.firstNum = pageIndex - halfOfPageNum <= 0 ? 1 : pageIndex - halfOfPageNum ; this.lastNum = firstNum + showPageNum - 1; } p.sort(Comparator.naturalOrder()); this.pageList=p; return this.pageList; } public List<?> getRows() { return rows; } public void setRows(List<?> rows) { this.rows = rows; } public PagedHelper(Map<String, Object> params ) { this.putAll(params); // 分页参数 if(params.get("pageIndex") != null && params.get("pageSize") != null ){ this.pageIndex=Integer.parseInt(params.get("pageIndex").toString()); this.pageSize=Integer.parseInt(params.get("pageSize").toString()); if(this.pageIndex<=0) { this.pageIndex=1; this.put("pageIndex",1); } if(this.pageSize<=0) { this.pageSize=10; this.put("pageSize",10); } this.put("offset",(this.pageIndex-1)*this.pageSize); this.put("limit",this.pageSize); } else { this.put("offset", params.get("offset") != null ? Integer.parseInt(params.get("offset").toString()) : 0); this.put("limit", params.get("limit") != null ? Integer.parseInt(params.get("limit").toString()) : 10); this.pageIndex=(Integer.parseInt(this.get("offset").toString())-1)/Integer.parseInt(this.get("limit").toString())+1; this.pageSize=Integer.parseInt(this.get("limit").toString()); this.put("pageIndex", this.pageIndex); this.put("pageSize", this.pageSize); } this.firstNum=1; if(params.get("showPageNum")==null) { this.showPageNum=8; } else { this.showPageNum=Integer.parseInt(params.get("showPageNum").toString()); } if(params.get("total")!=null) { this.total=Integer.parseInt(params.get("total").toString()); } this.totalPages=this.getTotalPages(); this.lastNum = this.totalPages; this.pageList = this.getPagelist(); this.put("firstNum", this.firstNum); this.put("lastNum", this.lastNum); this.put("pageList", this.pageList); this.put("showPageNum", this.showPageNum); this.put("previousSpot", this.previousSpot); this.put("nextSpot", this.nextSpot); this.put("totalPages",this.totalPages); } public PagedHelper(Map<String, Object> params,int total ) { this.putAll(params); this.put("total", total); // 分页参数 if(params.get("pageIndex") != null && params.get("pageSize") != null ){ this.pageIndex=Integer.parseInt(params.get("pageIndex").toString()); this.pageSize=Integer.parseInt(params.get("pageSize").toString()); if(this.pageIndex<=0) { this.pageIndex=1; } if(this.pageSize<=0) { this.pageSize=10; } this.put("offset",(this.pageIndex-1)*this.pageSize); this.put("limit",this.pageSize); } else { this.put("offset", params.get("offset") != null ? Integer.parseInt(params.get("offset").toString()) : 0); this.put("limit", params.get("limit") != null ? Integer.parseInt(params.get("limit").toString()) : 10); this.pageIndex=Integer.parseInt(this.get("offset").toString())/Integer.parseInt(this.get("limit").toString())+1; this.pageSize=Integer.parseInt(this.get("limit").toString()); } this.put("pageIndex", this.pageIndex); this.put("pageSize", this.pageSize); this.firstNum=1; if(params.get("showPageNum")==null) { this.showPageNum=8; } if(params.get("total")!=null) { this.total=Integer.parseInt(params.get("total").toString()); } if(total>=0) { this.total=total; } this.totalPages=this.getTotalPages(); this.lastNum = this.totalPages; this.pageList = this.getPagelist(); this.put("firstNum", this.firstNum); this.put("lastNum", this.lastNum); this.put("pageList", this.pageList); this.put("showPageNum", this.showPageNum); } }
后台查询分页数据的方法
@ResponseBody @PostMapping("/getListVue") public PageUtils getListVue(@RequestBody Map<String, Object> params) { // @RequestBody接收axios传来的参数 …… int total = orgCollectionService.getListCount(params); List<TOrgCollectionDO> tOrgList = orgCollectionService.getList(params); params.put("total", total); PagedHelper pagedHelper = new PagedHelper(params); PageUtils pageUtils = new PageUtils(tOrgList, total, pagedHelper);//关于total处理暂时未优化 return pageUtils; }
import java.io.Serializable; import java.util.List; public class PageUtils implements Serializable { private static final long serialVersionUID = 1L; private int total; private List<?> rows; private PagedHelper pages; public PageUtils(List<?> list, int total) { this.rows = list; this.total = total; } public PageUtils(List<?> list, int total,PagedHelper pages) { this.rows = list; this.total = total; this.pages=pages; } public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public List<?> getRows() { return rows; } public void setRows(List<?> rows) { this.rows = rows; } public PagedHelper getPages() { return pages; } public void setPages(PagedHelper pages) { this.pages = pages; } }
PageUtils 用于返回数据给前台;
demo.html使用vue分页组件vuepager
<table border="0" cellspacing="0" cellpadding="0" id="app"> <tr> <th>序号</th> <th><div>名称</div></th> <th width="92">类型</th> <th width="92">分类</th> <th>状态</th> <th>显示</th> <th>更新时间</th> <th class="last">操作</th> </tr> <tr v-for="(row,index) in list" :data-id="row.id"> <td>{{index+1}}</td> <!-- 其他列表项略 --> </tr> <tr v-if="list.length<=0"> <td colspan="8">暂无数据 <td> </tr> </table>
<div class=”page”>
<vuepager v-on:getdata=”getData” url=”/works/getListVue” v-bind:prop=”prop” ref=”myref”></vuepager>
</div>
<div th:include=”layout :: vuepager”></div> <!– 引入vuepager的themeleaf模板 –>
注:url属性为请求分页数据的地址,查询参数在prop里,通过axios发出请求,axios.post(this.url, this.prop)。
<script> Vue.component('vuepager', { template: '#vuePager', props: ['url', 'prop'], data: function () { return { pages: [], } }, mounted: function () { this.go(1); }, methods: { go: function (n) { this.getData(n); }, getData: function (n) { this.prop = this.prop || {}; this.prop.pageIndex = n; var me = this; axios.post(this.url, this.prop).then(function (res) { me.pages = res.data.pages; me.$emit("getdata", res.data.rows); }); } } }); </script>
demo.html文件里javascript代码请求分页数据
<script> var app = new Vue({ el : '#app', data : { list : [], orgcateid : -1, mediatype : '', checkstatus : -1, publishstatus : -1, statuscode : -1, title : '', pageIndex : 1 }, filters : { cutStr : function(str, maxLength) { if (str == undefined || str == "") { return ""; } if (str.length > maxLength) { return str.substr(0, maxLength - 1) + "..."; } else { return str; } } }, methods : { getData : function(data) { this.list = data; } }, computed : { prop : function() { return { mediatype : this.mediatype, orgcateid : this.orgcateid, checkstatus : this.checkstatus, publishstatus : this.publishstatus, title : this.title, sort : 'updatetime', order : 'desc', pageSize : 15, showPageNum : 4 } } } }); </script>
总结
本篇主要介绍了vue分页组件的定义及与后台分页数据的交互,涉及下拉列表框、文本框等搜索功能将单独介绍。