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-<template>
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- <div class="region-average-chart">
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- <!-- 重金属选择器 -->
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- <div class="metal-selector" v-if="!loading && !error && metals.length > 0">
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- <label for="metal-select">选择重金属:</label>
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- <select id="metal-select" v-model="selectedMetal">
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- <option v-for="metal in metals" :key="metal" :value="metal">{{ metal }}</option>
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- </select>
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- </div>
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-
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- <!-- 图表容器 -->
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- <div ref="chartRef" class="chart-box"></div>
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-
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- <!-- 状态信息 -->
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- <div v-if="loading" class="status">数据加载中...</div>
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- <div v-else-if="error" class="status error">{{ error }}</div>
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- <div v-else-if="metals.length === 0" class="status">没有有效的重金属数据</div>
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- </div>
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-</template>
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-
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-<script setup>
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-import { ref, onMounted, onUnmounted, watch } from 'vue';
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-import * as echarts from 'echarts';
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-import axios from 'axios';
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-
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-// ========== 接口配置 ==========
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-const SAMPLING_API = 'http://localhost:3000/table/Water_sampling_data';
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-const ASSAY_API = 'http://localhost:3000/table/Water_assay_data';
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-
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-// ========== 配置项 ==========
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-const EXCLUDE_FIELDS = [
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- 'water_assay_ID', 'sample_code', 'assayer_ID', 'assay_time',
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- 'assay_instrument_model', 'water_sample_ID', 'pH'
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-];
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-const COLORS = [
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- '#FF6B6B', '#4ECDC4', '#FFD166', '#6A4C93', '#1982C4',
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- '#FF9F1C', '#2EC4B6', '#E71D36', '#3A86FF', '#FF006E'
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-];
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-
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-// 韶关市下属行政区划
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-const SG_REGIONS = [
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- '浈江区', '武江区', '曲江区', '乐昌市',
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- '南雄市', '始兴县', '仁化县', '翁源县',
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- '新丰县', '乳源瑶族自治县'
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-];
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-
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-// ========== 响应式数据 ==========
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-const chartRef = ref(null);
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-const loading = ref(true);
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-const error = ref('');
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-// 修复 selectedMetal 未定义问题:提前声明变量
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-const selectedMetal = ref('');
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-const metals = ref([]);
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-const chartData = ref(null);
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-let myChart = null;
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-
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-// ========== 地区提取函数 ==========
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-const extractRegion = (location) => {
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- if (!location || typeof location !== 'string') return null;
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-
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- // 1. 精确匹配官方区县名称
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- const officialMatch = SG_REGIONS.find(region =>
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- location.includes(region)
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- );
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- if (officialMatch) return officialMatch;
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-
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- // 2. 处理嵌套格式(如"韶关市-浈江区")
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- const nestedMatch = location.match(/(韶关市)([^市]+?[区市县])/);
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- if (nestedMatch && nestedMatch[2]) {
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- const region = nestedMatch[2].replace("韶关市", "").trim();
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- // 验证是否为合法区县
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- const validRegion = SG_REGIONS.find(r => r.includes(region));
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- if (validRegion) return validRegion;
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- }
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-
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- // 3. 特殊格式处理(如"韶关市浈江区")
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- const shortMatch = location.match(/韶关市([区市县][^市]{2,5})/);
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- if (shortMatch && shortMatch[1]) return shortMatch[1];
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-
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- // 4. 修正常见拼写错误
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- if (location.includes('乐昌')) return '乐昌市';
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- if (location.includes('乳源')) return '乳源瑶族自治县';
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-
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- console.warn(`⚠️ 未识别地区: ${location}`);
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- return '未知区县';
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-};
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-
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-// ========== 数据处理流程 ==========
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-const processMergedData = (samplingData, assayData) => {
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- // 1. 构建采样点ID到区县的映射
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- const regionMap = new Map();
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- const uniqueSampleIds = new Set();
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-
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- samplingData.forEach(item => {
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- const region = extractRegion(item.sampling_location || '');
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- if (region && region !== '未知区县') {
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- regionMap.set(item.water_sample_ID, region);
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- }
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- });
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-
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- // 2. 关联重金属数据与区县
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- const mergedData = assayData.map(item => ({
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- ...item,
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- region: regionMap.get(item.water_sample_ID) || '未知区县'
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- }));
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-
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- // 3. 识别重金属字段
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- const detectedMetals = Object.keys(mergedData[0] || {})
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- .filter(key => !EXCLUDE_FIELDS.includes(key) && !isNaN(parseFloat(mergedData[0][key])));
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-
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- metals.value = detectedMetals;
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- if (detectedMetals.length > 0 && !selectedMetal.value) {
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- selectedMetal.value = detectedMetals[0];
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- }
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-
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- // 4. 按区县分组统计
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- const regionGroups = {};
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-
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- mergedData.forEach(item => {
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- const region = item.region;
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- const sampleId = item.water_sample_ID;
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-
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- if (sampleId) uniqueSampleIds.add(sampleId);
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-
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- // 初始化区县数据
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- if (!regionGroups[region]) {
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- regionGroups[region] = {};
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- detectedMetals.forEach(metal => {
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- regionGroups[region][metal] = { sum: 0, count: 0 };
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- });
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- }
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-
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- // 统计重金属数据
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- detectedMetals.forEach(metal => {
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- const val = parseFloat(item[metal]);
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- if (!isNaN(val)) {
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- regionGroups[region][metal].sum += val;
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- regionGroups[region][metal].count++;
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- }
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- });
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- });
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-
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- // 5. 构建扇形图数据
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- const pieSeriesData = detectedMetals.map(metal => {
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- // 该重金属在各区县的平均浓度总和
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- let totalAverage = 0;
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-
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- // 收集各区县该重金属的平均值
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- const regionAverages = SG_REGIONS.map(region => {
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- if (!regionGroups[region]) return null;
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-
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- const group = regionGroups[region][metal];
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- const avg = group.count ? group.sum / group.count : 0;
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- totalAverage += avg;
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-
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- return {
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- name: region,
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- value: avg
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- };
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- }).filter(Boolean);
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-
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- // 计算占比
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- const seriesData = regionAverages.map(item => ({
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- name: item.name,
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- value: totalAverage > 0 ? (item.value / totalAverage) * 100 : 0,
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- rawValue: item.value // 保留原始浓度值用于显示
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- }));
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-
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- return {
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- metal,
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- seriesData
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- };
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- });
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-
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- return {
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- regions: SG_REGIONS,
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- pieSeriesData,
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- totalSamples: uniqueSampleIds.size
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- };
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-};
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-
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-// ========== 初始化/更新图表 ==========
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-const initChart = () => {
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- if (!chartRef.value || !selectedMetal.value || !chartData.value) return;
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-
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- if (myChart) myChart.dispose();
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- myChart = echarts.init(chartRef.value);
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-
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- // 获取当前重金属的数据
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- const currentMetalData = chartData.value.pieSeriesData.find(
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- item => item.metal === selectedMetal.value
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- );
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-
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- if (!currentMetalData) return;
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-
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- const option = {
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- title: {
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- text: `韶关市${selectedMetal.value}平均浓度区域占比`,
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- left: 'center',
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- subtext: `数据来源: ${chartData.value.totalSamples}个有效检测样本`
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- },
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- tooltip: {
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- trigger: 'item',
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- formatter: function(params) {
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- return `${params.name}<br/>
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- ${selectedMetal.value}: ${params.data.rawValue.toFixed(4)} mg/L<br/>
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- 占比: ${params.percent}%`;
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- }
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- },
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- legend: {
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- orient: 'vertical',
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- right: 10,
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- top: 'center',
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- data: currentMetalData.seriesData.map(item => item.name)
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- },
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- series: [
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- {
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- name: selectedMetal.value,
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- type: 'pie',
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- radius: ['35%', '65%'],
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- center: ['45%', '50%'],
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- avoidLabelOverlap: false,
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- itemStyle: {
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- borderRadius: 10,
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- borderColor: '#fff',
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- borderWidth: 2
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- },
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- label: {
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- show: false,
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- position: 'center'
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- },
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- emphasis: {
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- label: {
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- show: true,
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- fontSize: '16',
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- fontWeight: 'bold',
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- formatter: '{b}\n{c}%'
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- }
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- },
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- labelLine: {
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- show: false
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- },
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- data: currentMetalData.seriesData
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- }
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- ],
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- color: COLORS
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- };
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-
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- myChart.setOption(option);
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-};
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-
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-// ========== 生命周期钩子 ==========
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-onMounted(async () => {
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- try {
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- // 修复请求超时问题:将超时时间延长至10秒
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- const [samplingRes, assayRes] = await Promise.all([
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- axios.get(SAMPLING_API, { timeout: 10000 }), // 10秒超时
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- axios.get(ASSAY_API, { timeout: 10000 })
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- ]);
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-
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- chartData.value = processMergedData(samplingRes.data, assayRes.data);
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- initChart();
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- } catch (err) {
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- // 处理超时错误
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- if (err.code === 'ECONNABORTED') {
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- error.value = '请求超时:服务器响应时间超过10秒';
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- } else {
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- error.value = '数据加载失败: ' + (err.message || '未知错误');
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- }
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- console.error('接口错误:', err);
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- } finally {
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- loading.value = false;
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- }
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-});
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-
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-// 监听重金属选择变化
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-watch(selectedMetal, (newVal) => {
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- if (newVal && myChart && chartData.value) {
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- initChart();
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- }
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-});
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-
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-// 响应式布局
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-const resizeHandler = () => myChart && myChart.resize();
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-onMounted(() => window.addEventListener('resize', resizeHandler));
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-onUnmounted(() => window.removeEventListener('resize', resizeHandler));
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-</script>
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-
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-<style scoped>
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-.region-average-chart {
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- width: 100%;
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- max-width: 1200px;
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- margin: 20px auto;
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- position: relative;
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-}
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-.chart-box {
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- width: 100%;
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- height: 600px;
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- min-height: 400px;
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- background-color: white;
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- border-radius: 8px;
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- box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
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-}
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-.status {
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- position: absolute;
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- top: 50%;
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- left: 50%;
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- transform: translate(-50%, -50%);
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- padding: 15px;
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- background: rgba(255,255,255,0.8);
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- border-radius: 4px;
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- text-align: center;
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-}
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-.error {
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- color: #ff4d4f;
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- font-weight: bold;
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-}
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-.metal-selector {
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- margin-bottom: 15px;
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- text-align: center;
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- padding: 10px;
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-}
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-.metal-selector label {
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- margin-right: 10px;
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- font-weight: bold;
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-}
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-.metal-selector select {
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- padding: 8px 15px;
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- border-radius: 4px;
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- border: 1px solid #ddd;
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- background-color: #f8f8f8;
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- font-size: 14px;
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- min-width: 150px;
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- cursor: pointer;
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- transition: border 0.3s;
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-}
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-.metal-selector select:hover {
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- border-color: #1890ff;
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-}
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-</style>
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