ECharts 및 Java 인터페이스를 사용하여 시각적 데이터 마이닝을 구현하는 방법

import java.util.HashMap;
import java.util.Map;

public class Main {

    public static void main(String[] args) {
        // 数据处理
        Map<String, Double> data = new HashMap<>();
        data.put("苹果", 55.0);
        data.put("橘子", 30.0);
        data.put("香蕉", 15.0);

        // 传递给ECharts
        sendDataToECharts(data);
    }

    public static void sendDataToECharts(Map<String, Double> data) {
        // 构造JSON数据，格式需符合ECharts要求
        StringBuilder json = new StringBuilder();
        json.append("[");
        for (String key : data.keySet()) {
            json.append("{");
            json.append("'name':'").append(key).append("',");
            json.append("'value':").append(data.get(key)).append("");
            json.append("},");
        }
        json.deleteCharAt(json.length() - 1);
        json.append("]");

        // 通过网络传递给前端
        String url = "http://localhost:8080/sendData";
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("data", json.toString()));
        httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
        
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
    }
}

var data = [];

$.ajax({
    type: 'POST',
    url: '/sendData',
    dataType: 'json',
    success: function(response) {
        data = response;
        
        // 饼图配置
        var option = {
            series: [{
                name: '水果销量',
                type: 'pie',
                radius: '55%',
                data: data
            }]
        };
        
        // 初始化ECharts，并渲染图表
        var myChart = echarts.init(document.getElementById('chartContainer'));
        myChart.setOption(option);
    }
});