Echarts动态加载多条折线图的实现代码

背景：动态加载多条折线图，折线图条数不确定

页面效果：

页面代码

//气象数据
	function serchQx(beginTime, endTime, str, parameter) {
		$("#rr").html("");//将循环拼接的字符串插入下拉列表
		var t = $("#imageParameter").val();
		$
				.ajax({
					type : "POST",
					data : {
						"str" : str,
						"beginTime" : beginTime,
						"endTime" : endTime,
						"parameter" : parameter,
						"t" : t
					},
					url : "${pageContext.servletContext.contextPath}/dataAnalysis/serch.action",
					success : function(result) {
						var aa = [];
						var tmp=[];
						if (parameter == 1) {
							aa.push('单位（℃）');
							//option.yAxis[0].name = aa;
						} else if (parameter == 2) {
							aa.push('单位（%）');
							//option.yAxis[0].name = aa;
						} else if (parameter == 3) {
							aa.push('单位（KPa）');
							//option.yAxis[0].name = aa;
						} else if (parameter == 4) {
							aa.push('单位（w/㎡）');
							//option.yAxis[0].name = aa;
						} else if (parameter == 5) {
							aa.push('单位（mm）');
							//option.yAxis[0].name = aa;
						} else if (parameter == 6) {
							aa.push('单位（m/s）');
							//option.yAxis[0].name = aa;
						}
						//处理数据
						//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++) {
							var datas=[];
							for(var j=0;j<series_arr[i].data.length;j++){
								var n=series_arr[i].data[j];
								var time=series_arr[i].time[j];
								var data=[time,n];
								datas.push(data);
							}
							//转换Series
							 temp = {
					          name: series_arr[i].name,
					          type: "line",
					          data: datas
					        };
							 tmp.push(temp)
							 //option.series.push(temp);
						}
						myChart.clear();
						//myChart.setOption(option,true);
						myChart.setOption({ //加载数据图表
							color : colors,
							tooltip : {
								trigger : 'axis'
							},
							dataZoom : {
								show : true,
								start : 0,
								realtime : true
							},
							legend : {
								data : jsonobj.legend
							},
							grid : {
								top : 70,
								bottom : 50
							},
							 calculable: true,
							xAxis : [ {
								type : 'time',
								boundaryGap : [ 0, 100 ],
								axisLabel : {
									textStyle : {
										fontSize : "10px"
									}
								}

							}

							],
							yAxis : [ {
								name : aa,
								type : 'value',
							} ],
							series : tmp},true);
					}
				})
	}

后台封装的Series

/**
 *
 */
package com.myhope.domain;

import java.util.List;

/**
 * Description：<br/>
 * Copyright (c) ， 2017， Jansonxu <br/>
 * This program is protected by copyright laws. <br/>
 * Program Name：Series<br/>
 * Date：2019年1月14日
 *
 * @author
 * @version : 1.0
 */
public class Series {
	private String name;
	private String type;
	private List<Double> data;
	private List<String> time;

	public Series(String name, String type, List<Double> data, List<String> time) {
		super();
		this.name = name;
		this.type = type;
		this.data = data;
		this.time = time;
	}

	public List<String> getTime() {
		return time;
	}

	public void setTime(List<String> time) {
		this.time = time;
	}

	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
	public List<Double> getData() {
		return data;
	}
	public void setData(List<Double> data) {
		this.data = data;
	}
	public Series() {
		super();
	}
	@Override
	public String toString() {
		return "Series [name=" + name + ", type=" + type + ", data=" + data + ", time=" + time + "]";
	}

}

后台封装Echarts

/**
 *
 */
package com.myhope.domain;

import java.util.List;

/**
 * Description：<br/>
 * Copyright (c) ， 2017， Jansonxu <br/>
 * This program is protected by copyright laws. <br/>
 * Program Name：Echarts<br/>
 * Date：2019年1月14日
 *
 * @author
 * @version : 1.0
 */
public class Echarts {
	private List<String> legend;//name
	private List<String> axis ;//横坐标
	private List<Series> series;//数据项
	private List<DataAnalysisTable> dataAnalysisTables;

	public Echarts(List<String> legend, List<String> axis, List<Series> series,
			List<DataAnalysisTable> dataAnalysisTables) {
		super();
		this.legend = legend;
		this.axis = axis;
		this.series = series;
		this.dataAnalysisTables = dataAnalysisTables;
	}

	public Echarts() {
		super();
	}

	public List<String> getLegend() {
		return legend;
	}
	public void setLegend(List<String> legend) {
		this.legend = legend;
	}
	public List<String> getAxis() {
		return axis;
	}
	public void setAxis(List<String> axis) {
		this.axis = axis;
	}
	public List<Series> getSeries() {
		return series;
	}
	public void setSeries(List<Series> series) {
		this.series = series;
	}

	public List<DataAnalysisTable> getDataAnalysisTables() {
		return dataAnalysisTables;
	}

	public void setDataAnalysisTables(List<DataAnalysisTable> dataAnalysisTables) {
		this.dataAnalysisTables = dataAnalysisTables;
	}

	@Override
	public String toString() {
		return "Echarts [legend=" + legend + ", axis=" + axis + ", series=" + series + ", dataAnalysisTables="
				+ dataAnalysisTables + "]";
	}

}

Action封装

将对应的东西传入页面即可

Echarts echarts = new Echarts(legend, newAxis, series,);
String jsonString = com.alibaba.fastjson.JSONObject.toJSONString(echarts);

初始化Echarts文件

var dom = document.getElementById("xsl");
var myChart = echarts.init(dom);
myChart.showLoading({
	text : "图表数据正在努力加载..."
});
var app = {};
app.title = '多 X 轴示例';

var colors = [ '#5793f3', '#d14a61', '#675bba', "#00FF00", "#FFFF00" ];

option = {
	color : colors,
	tooltip : {
		trigger : 'axis'
	},
	dataZoom : {
		show : true,
		start : 0,
		realtime : true
	},
	legend : {
		data : []
	},
	grid : {
		top : 70,
		bottom : 50
	},
	 calculable: true,
	xAxis : [ {
		type : 'time',
		boundaryGap : [ 0, 100 ],
		axisLabel : {
			textStyle : {
				fontSize : "10px"
			}
		}

	}

	],
	yAxis : [ {
		name : [],
		type : 'value',
	} ],
	series : []
};
myChart.clear();
myChart.setOption(option, true);

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