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采用layui前台框架实现前后台交互,数据分页显示以及删除操作,具体方式如下:
一、数据分页显示
1.前端
(1)html页面
<!--轮播数据分页显示--> <table class="layui-hide" id="content_lbt" lay-filter="content_lbt_filter"></table>
(2)请求渲染数据
$(function() { /*轮播数据分页显示*/ layui.use(['table', 'update'], function() { var table = layui.table, upload = layui.upload; table.render({ elem: '#content_lbt', height: 500 //,url: 'data/content_lbt.json' //数据接口 , url: 'http://localhost:9911/cms/queryCarouselList' //数据接口 , page: true //开启分页 , loading: true,//分页查询是否显示等待图标 text: {//若查询记录为空,执行此操作 none: '暂无相关数据' } //默认:无数据。注:该属性为 layui 2.2.5 开始新增 , cellMinWidth: 80 //全局定义常规单元格的最小宽度,layui 2.2.1 新增 , cols: [ [{ field: 'id', width: '10%', title: 'ID', sort: true }, { field: 'posterId', width: '10%', title: '上传者ID', sort: true }, { field: 'posterName', width: '15%', title: '上传者姓名' }, { field: 'description', width: '28%', title: '描述', minWidth: 200 }, { field: 'photoPath', width: '10%', title: '图片', minWidth: 100 }, { field: 'createTime', width: '10%', title: '上传时间', minWidth: 100 }] ], request: { pageName: 'page', limitName: 'size' }, limit: 10, limits: [10, 20, 30, 40, 50] }); });
2.后端
后端采用SpringBoot,利用SSM框架
(1)mapper:(注意@Mapper注解)
/** * 查询所有轮播图信息 * * @return */ List<Carousel> queryCarousel(@Param("start") Integer start, @Param("size") Integer size); /** * 查询轮播记录条数 * * @return */ Integer countCarousel();
注意po类采用驼峰式写法
<select id="queryCarousel" resultType="com.jingling.basic.po.Carousel"> SELECT id, poster_id AS posterId, poster_name AS posterName, description AS description , photo_path AS photoPath, create_time AS createTime FROM carousel LIMIT #{start}, #{size} </select> <select id="countCarousel" resultType="int"> SELECT COUNT(*) FROM carousel </select>
(2)service
/** * 查询全部轮播信息 * * @return */ List<Carousel> queryCarousel(Integer page,Integer size); /** * 查询轮播记录条数 * * @return */ Integer countCarousel();
(3)serviceImpl(注意要有@Service注解)
@Autowired private CarouselMapper carouselMapper; @Override public List<Carousel> queryCarousel(Integer page,Integer size) { if(page == null || page <= 0){ page = 1; } if (size == null || size <= 0){ size = 10; } Integer start = (page - 1) * size; return carouselMapper.queryCarousel(start,size); } @Override public Integer countCarousel() { return carouselMapper.countCarousel(); }
(4)Controller(注意要有@RequestController注解)
@RestController @RequestMapping("/cms") @Autowired public CmsService cmsService; /** * 查询轮播图信息 * * @return */ @GetMapping("/queryCarouselList") public Object queryCarouselList(HttpServletResponse response, @RequestParam("page") Integer page, @RequestParam("size") Integer size){ response.setHeader("Access-Control-Allow-Origin", "*");//解决跨域的问题 List<Carousel> carouselList = cmsService.queryCarousel(page,size); if (carouselList == null){ return RecycleResult.build(500,"轮播图为空"); } //return RecycleResult.ok(carouselList); //return carouselList; Integer count = cmsService.countCarousel(); return new LayuiReplay<Carousel>(0, "OK", count, carouselList); }
二、删除操作
1.前端
<script type="text/html" id="barDemo"> <a class="layui-btn layui-btn-xs" lay-event="detail">查看</a> <!--<a class="layui-btn layui-btn-xs" lay-event="edit">编辑</a>--> <a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del">删除</a> </script> { fixed: 'right', width: '15%', align: 'center', title: '操作', toolbar: '#barDemo' } fixed: 'right', width: '15%', align: 'center', title: '操作', toolbar: '#barDemo' } //监听工具条 table.on('tool(content_lbt_filter)', function(obj) { //注:tool是工具条事件名,test是table原始容器的属性 lay-filter="对应的值" var data = obj.data //获得当前行数据 , layEvent = obj.event; //获得 lay-event 对应的值 if(layEvent === 'detail') { layer.msg('查看操作'); } else if(layEvent === 'del') { layer.confirm('真的删除行么', function(index) { //obj.del(); //删除对应行(tr)的DOM结构 delCarouselById(data.id); layer.close(index); //向服务端发送删除指令 }); } /*else if(layEvent === 'edit'){ layer.msg('编辑操作'); }*/ }); //删除记录 function delCarouselById(id) { $.get("http://localhost:9911/cms/delCarouselById?id=" + id, function(data, status) { layer.msg('删除成功'); }); }
2.后端(此处仅显示controller层和mapper)
@GetMapping("/delCarouselById") public RecycleResult delCarouselById(HttpServletResponse response,@RequestParam("id") Integer id){ response.setHeader("Access-Control-Allow-Origin", "*"); cmsService.delCarouselById(id); return RecycleResult.ok(); } <delete id="delCarouselById"> DELETE FROM carousel WHERE id = #{id} </delete>
补充LayuiReplay类(其中get、set方法省略)
public class LayuiReplay <T> { private int code; private String msg; private int count; private List<T> data; public LayuiReplay(int code, String msg, int count, List<T> data) { this.code = code; this.msg = msg; this.count = count; this.data = data; } public String toJson() { Gson gson = new Gson(); String json = gson.toJson(this); return json; } public static <T> String toJson(int count, List<T> data) { LayuiReplay<T> replay = new LayuiReplay<>(ReplyCode.OK.getCode(), ReplyCode.OK.getMessage(), count, data); return replay.toJson(); } }
补充ReplyCode.java枚举类
public enum ReplyCode { NOT_LOGIN(-1,"您尚未登录或登录时间过长,请重新登录或刷新页面!"), OK(0, "OK"), WRONG_URL(400,"请求路径错误"), WRONG_ROLE(401, "身份错误"), REQUEST_FAILED(500, "请求失败,请重试"), NULL_ATTR(30,"属性不能为空"), ATTR_WRONG(31, "属性填写错误"), WRONG_LENGTH(32, "数据长度不符合要求"), WRONG_PATTERN(33, "数据格式错误"), VAILD_WRONG(100,"验证码错误"), CUSTOM(999, "") ; ReplyCode(int code, String message) { this.code = code; this.message = message; } private int code; private String message; public int getCode() { return code; } public ReplyCode setCode(int code) { this.code = code; return this; } public String getMessage() { return message; } public ReplyCode setMessage(String message) { this.message = message; return this; } }
以上这篇layui框架与SSM前后台交互的方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持亿速云。
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