ECharts Java 动态加载数据，echartsjava

1、前台jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>ECharts</title>
    <script type="text/javascript" src="${ctx}/plugins/echarts-2.2.1/echarts.js"></script>
    <script type="text/javascript" src="${ctx}/plugins/jquery-1.8.3/jquery-1.8.3.min.js"></script>
    <script type="text/javascript">
        // 配置路径
        require.config({
            paths: {
                echarts: '${ctx}/plugins/echarts-2.2.1'
            }
        });

        // 按需加载
        require(
            [
               'echarts', 
               'echarts/chart/bar',
               'echarts/chart/line'
            ],
            function (ec) {
                var chart = document.getElementById('chart');
                var echart = ec.init(chart);

                echart.showLoading({
                    text: '正在努力加载中...'
                });

                var categories = [];
                var values = [];

                // 同步执行
                $.ajaxSettings.async = false;

                // 加载数据
                $.getJSON('${ctx}/dataAccessServlet', function (json) {
                    categories = json.categories;
                    values = json.values;
                });

                var option = {
                    tooltip: {
                        show: true
                    },
                    legend: {
                        data: ['销量']
                    },
                    xAxis: [
                        {
                            type: 'category',
                            data: categories
                        }
                    ],
                    yAxis: [
                        {
                            type: 'value'
                        }
                    ],
                    series: [
                        {
                            'name': '销量',
                            'type': 'bar',
                            'data': values
                        }
                    ]
                };

                echart.setOption(option);
                echart.hideLoading();
            }
        );
    </script>
</head>
<body>
    <div id="chart" style="width: 580px;height: 420px;margin: 0 auto;border: 1px solid gray;"></div>
</body>
</html>

2、后台JSON数据

protected void doPost(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {
    String[] categories = {"鞋", "衬衫", "外套", "牛仔裤"};
    Integer[] values = {80, 50, 75, 100};
    Map<String, Object> json = new HashMap<String, Object>();
    json.put("categories", categories);
    json.put("values", values);
    JsonUtils.writeJson(json, request, response);
}

3、最终实现效果
这里写图片描述
ECharts首页：http://echarts.baidu.com/

ECharts Java 类库：http://git.oschina.net/free/ECharts

本文出自 “没有水勒鱼” 博客，请务必保留此出http://javaqun.blog.51cto.com/10687700/1725785

ECharts Java 动态加载数据，echartsjava

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