springboot搭建ajax请求显示Charts图形
- 2019 年 12 月 12 日
- 筆記
背景
前端与后端交互的时候通常是直接请求,但直接交互会影响用户体验,通过异步方式进行与后端服务交互是不错的简单技术,Ajax是一个比较不错的异步请求,网上也有很多,但是还是想自己学习下,下面简单演示一个请求,一方面方便自己复习,二方面给大家积累小小知识。
正常请求图

效果
数据响应完全依赖后端服务响应,如果服务端出现异常现象,或者出现短路,或者前端显示空白,或者闪频等现象很影响用户体验,那么小范围或者局部刷新是一个必然产生的技术。
Ajax请求图

说明:
- 前端输入数据通过jquery/dom等技术获取数据;
- Ajax通过get/post把数据提交个后端服务器
- 服务器响应结果给ajax,ajax再回显到页面或者通过转发到其他页面
java演示
- 新建springboot工程,选择导入依赖jar
- 新建统一返回结果类
统一响应类
import java.util.HashMap;import java.util.Map; /** * @author liwen * @Title: Msg * @Description: 响应数据 * @date 2019/12/4 / 11:07 */public class Msg { /**状态码 100-成功 200-失败*/ private int code; /**提示信息*/ private String msg; /**用户要返回给浏览器的数据*/ private Map<String, Object> extend = new HashMap<String, Object>(); public static Msg success(){ Msg result = new Msg(); result.setCode(100); result.setMsg("处理成功!"); return result; } public static Msg fail(){ Msg result = new Msg(); result.setCode(200); result.setMsg("处理失败!"); return result; } public Msg add(String key,Object value){ this.getExtend().put(key, value); return this; } //省越get}
AjaxControler类
@PostMapping("/cookice") @ResponseBody public Msg getCookie(String cookie) { if (!StringUtils.isEmpty(cookie.trim())) { //做回显数据用 HashMap<String, String> demokinfo = new HashMap<>(); demokinfo.put("cooke", cookie); demokinfo.put("ok", "我是java"); return Msg.success().add("page", demokinfo); } else { String oo = "{"calculable": true,"title": {"text": "某楼盘销售情况","subtext": "纯属虚构"},"toolbox": {"feature": {"mark": {"show": true,"title": {"markUndo": "删除辅助线","markClear": "清空辅助线","mark": "辅助线开关"},"lineStyle": {"color": "#1e90ff","type": "dashed","width": 2}},"dataView": {"show": true,"title": "数据视图","readOnly": false,"lang": ["数据视图","关闭","刷新"]},"magicType": {"show": true,"title": {"bar": "柱形图切换","stack": "堆积","tiled": "平铺","line": "折线图切换"},"type": ["line","bar","stack","tiled"]},"restore": {"show": true,"title": "还原"},"saveAsImage": {"show": true,"title": "保存为图片","type": "png","lang": ["点击保存"]}},"show": true,"padding": 20},"tooltip": {"trigger": "axis"},"legend": {"data": ["意向","预购","成交"]},"xAxis": [{"type": "category","boundaryGap": false,"data": ["周一","周二","周三","周四","周五","周六","周日"]}],"yAxis": [{"type": "value"}],"series": [{"smooth": true,"name": "成交","type": "line","itemStyle": {"normal": {"areaStyle": {"type": "default"}}},"data": [10,12,21,54,260,830,710]},{"smooth": true,"name": "预购","type": "line","itemStyle": {"normal": {"areaStyle": {"type": "default"}}},"data": [30,182,434,791,390,30,10]},{"smooth": true,"name": "意向","type": "line","itemStyle": {"normal": {"areaStyle": {"type": "default"}}},"data": [1320,1132,601,234,120,90,20]}]}"; //前端显示数据 HashMap<String, String> hashMap = new HashMap<>(); hashMap.put("infodemo", oo); return Msg.fail().add("key", hashMap); } }
前端写法
给html绑定事件为:submit_cookie():改函数可以随便写

显示:

Post参考代码
$(function () { //去首页 submit_cookie(); }); function submit_cookie() { //获取cookie值 var cookie = $("#cookieinfo").val(); var keyChart99 = echarts.init(document.getElementById('maintp9')); $.ajax({ url: "/cookice", data: {"cookie": cookie}, type: "post", //回调函数 success: function (result) { if (result.code == 100) { console.log("响应结果数据:" + result.extend.key); // 使用刚指定的配置项和数据显示图表。 console.log("响应结果数据:" + result.extend.page.ok); //回显数据 $("#cookieinfo").val(result.extend.page.cooke); } else {keyChart99.setOption(JSON.parse(result.extend.page.key)); console.log("响应结果数据:" + result.extend.key.infodemo); } } }); } else { console.log("cookie为空"); }}
前端页面显示:

回顾
- 本次采用jquery.js的ajax请求并回显数据
- 需要声明
$(function () {
//编写函数
});
- 函数写法
$(function () { //去首页 submit_cookie(); }); function submit_cookie() {})
Get参考代码
//当点击在线用例编辑就请求function to_init() { $.ajax({ type: 'GET', url: '/xmind/ajaxData', data: {"ids": 1}, beforeSend: function () { loadingIndex = layer.msg('处理中', {icon: 16}); }, success: function (result) { layer.close(loadingIndex); if (result.code == web_status.SUCCESS) { layer.msg("信息打开成功", {time: 1000, icon: 6}, function () { console.log("显示xmind数据:" + userXmind); }); } else { layer.msg("信息打开失败,请重新操作", {time: 2000, icon: 5, shift: 6}, function () { }); } } });}
总结:
上面是简单ajax的get/post请求,相信大家了解,其实在做性能明白ajax原理与写法,对自己理解前端性能有一定帮助,上面如果不明白可以百度查询相关资料。