Echarts官网的demo都采用的数据都是静态数据,本demo是在Echarts官网入门demo的基础上改的,从后台 获取数据并展示,供入门参考
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前端页面代码
代码语言:javascript复制<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
%>
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>ECharts</title>
</head>
<body>
<!-- 为ECharts准备一个具备大小(宽高)的Dom -->
<div id="main" style="width: 800px; height: 300px"></div>
<!-- ECharts单文件引入 -->
<script type="text/javascript" src="js/jquery-2.1.4.min.js"></script>
<script type="text/javascript" src="build/dist/echarts.js"></script>
<script src="http://echarts.baidu.com/build/dist/echarts.js"></script>
<script type="text/javascript">
// 路径配置
require.config({
paths : {
echarts : 'build/dist'
}
});
// 使用
require([ 'echarts', 'echarts/chart/bar' // 使用柱状图就加载bar模块,按需加载
], function(ec) {
// 基于准备好的dom,初始化echarts图表
var myChart = ec.init(document.getElementById('main'));
var option = {
tooltip : {
show : true
},
legend : {
data : []
},
xAxis : [ {
type : 'category',
data : []
} ],
yAxis : [ {
type : 'value'
} ],
series : []
};
$.ajax({
type : "POST",
url : "gettestdata",
dataType : "json",
success : function(result) {
//将从后台接收的json字符串转换成json对象
var jsonobj = eval(result);
//给图标标题赋值
option.legend.data = jsonobj.legend;
//读取横坐标值
option.xAxis[0].data = jsonobj.axis;
var series_arr = jsonobj.series;
//驱动图表生成的数据内容,数组中每一项代表一个系列的特殊选项及数据
for (var i = 0; i < series_arr.length; i ) {
option.series[i] = result.series[i];
}
//过渡控制,隐藏loading(读取中)
myChart.hideLoading();
// 为echarts对象加载数据
myChart.setOption(option);
}
});
});
</script>
</body>
后台数据封装代码
代码语言:javascript复制//通过ajax请求数据 将请求的数据返回到页面进行图表的显示
@RequestMapping("gettestdata")
public void getTestData(HttpServletResponse response) {
List<String> legend = new ArrayList<String>(Arrays.asList(new String[] { "销量"}));
List<String> axis = new ArrayList<String>(
Arrays.asList(new String[] { "衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子" }));
List<Series> series = new ArrayList<Series>();
series.add(new Series("销量", "bar", new ArrayList<Integer>(Arrays.asList(5, 20, 40, 10, 10, 20))));
Echarts echarts = new Echarts(legend, axis, series);
response.setContentType("text/html;charset=utf-8");
PrintWriter out;
try {
out = response.getWriter();
Gson gson = new Gson();
String str = gson.toJson(echarts);
System.out.println("str:" str);
out.write(str);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}