手把手教你用策略模式 写echarts的配置项option

前言：策略模式和适配器模式很像但前者策略的接口和相关类会暴露出来，并且每个策略的“计算内容”都不同【常用于计算】。

一、研究下echarts官网的重要配置

1.1 常用项主要有title legend xAxis yAxis legend dataset series textStyle 如下图所示

file
file

二、建立Echarts的option类我在此命名为EchartsOption 【注：后面一般option下直接属性 java命名前缀都是Echarts】

package com.ken.sys.common.entity.echarts.option;

import com.ken.sys.common.entity.echarts.axis.EchartsXYAxis;
import com.ken.sys.common.entity.echarts.dataset.EchartDataset;
import com.ken.sys.common.entity.echarts.legend.EchartsLegend;
import com.ken.sys.common.entity.echarts.series.EchartBaseSeries;
import com.ken.sys.common.entity.echarts.textStyle.EchartsTextStyle;
import com.ken.sys.common.entity.echarts.title.EchartsTitle;

import java.util.List;

/**
*

@author swc

@date 2020/7/3 0003 下午 13:43

*/
public class EchartsOption {

//标题
private EchartsTitle title;

//图例组件。
//图例组件展现了不同系列的标记(symbol)，颜色和名字。可以通过点击图例控制哪些系列不显示。
private EchartsLegend legend;

//直角坐标系 grid 中的 x 轴，
private EchartsXYAxis xAxis;

//直角坐标系 grid 中的 y 轴，[x轴和y轴 属性是一样的]
private EchartsXYAxis yAxis;

//默认颜色值  全局
private Object color =new String[]{"#c23531","#2f4554", "#61a0a8", "#d48265", "#91c7ae","#749f83",  "#ca8622", "#bda29a","#6e7074", "#546570", "#c4ccd3"};

//全局的字体样式。
private EchartsTextStyle textStyle;

//系列列表。每个系列通过 type 决定自己的图表类型
private List<EchartBaseSeries> series;

//注意
//Charts 4 开始支持了 数据集（dataset）组件用于单独的数据集声明，
// 从而数据可以单独管理，被多个组件复用，并且可以自由指定数据到视觉的映射。这在不少场景下能带来使用上的方便。
private EchartDataset dataset;

//省略get set方法

}
2.1 以title 为例子写相关的java类EchartsTitle
file

/
*
*
*

*
*/
package com.ken.sys.common.entity.echarts.title;

/**

<ul>
<li>Title= EchartsTitle</li>
<li>Description= TODO </li>
<li>Copyright= Copyright (c) 2018</li>
<li>Company= http=//www.jiangqiaotech.com/</li>
</ul>

@author swc

@date 2020/7/3 0003 下午 13=54

*/
public class EchartsTitle {

private String id  ;

//是否显示标题组件
private boolean show= true ;

//主标题文本，支持使用 \n 换行。
private String text= "" ;

private String link= "" ;

private String target= "blank" ;

private Object textStyle;

private String subtext= "" ;

private String sublink= "" ;

private String subtarget= "blank" ;

private String  subtextStyle;
//可选值："auto"、"left"、"right"、"center"。
private String  textAlign= "auto" ;

private String textVerticalAlign= "auto" ;

private boolean triggerEvent= false ;

//number /Array
//5 or [5,10,2,20]
private Object padding= 5 ;

private Integer itemGap= 10 ;

private Integer zlevel= 0 ;

private Integer z= 2 ;

//string | number
private Object left= "auto" ;

//string | number
private Object top= "auto" ;

//string | number
private Object right= "auto" ;

//string | number
private Object bottom= "auto" ;

//Color
private Object backgroundColor= "transparent" ;

//Color
private Object borderColor= "#ccc" ;

private Integer borderWidth= 0 ;

private Integer  borderRadius= 0 ;

private Integer shadowBlur ;

//Color
private Object  shadowColor ;

private Integer  shadowOffsetX= 0 ;

private Integer  shadowOffsetY= 0 ;


//省略get set方法

}

file
其他相关类在此不做赘述

这里简单说一下 series 使用基类【EchartBaseSeries】其他如饼图折线图等的series都是集成EchartBaseSeries
file

三、编写策略类【策略模式】

3.1 主要分为三部分，一是策略接口【EchartsStrategy】二是策略的上下文对外暴露匹配不同的策略行使不同的方案

三是工厂类将策略注入做到匹配不同的类型的策略

3.1.1 策略接口【EchartsStrategy】

public interface EchartsStrategy {
// //创建option

<T> EchartsOption createOption(IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto);

//会创建多个option
<T>List<EchartsOption> createMulOption(IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto);

}
3.1.2 策略上下文【EchartStrategyContext】

package com.ken.sys.common.strategycontext.echarts;

import com.ken.sys.common.entity.echarts.dto.HandEchartsDto;
import com.ken.sys.common.entity.echarts.option.EchartsOption;
import com.ken.sys.common.ifs.IEchartSeries;
import com.ken.sys.common.strategy.echarts.base.EchartsStrategy;

import java.util.List;

/**

<ul>
<li>Title: EchartStrategyContext</li>
</ul>

@author swc

@date 2020/7/3 0003 下午 14:54

*/
public class EchartStrategyContext {

//echart 的生成策略
private EchartsStrategy echartsStrategy;


public <T>EchartsOption createOption(IEchartSeries iEchartSeries, List<T> list,HandEchartsDto echartsDto){
    if (echartsStrategy != null) {
       return echartsStrategy.createOption(iEchartSeries,list,echartsDto);
    }
    return null;
}

//会创建多个option
public <T> List<EchartsOption> createMulOption(IEchartSeries iEchartSeries, List<T> list,HandEchartsDto echartsDto){
    if (echartsStrategy != null) {
        return echartsStrategy.createMulOption(iEchartSeries,list,echartsDto);
    }
    return null;
}


public EchartStrategyContext(EchartsStrategy echartsStrategy) {
    this.echartsStrategy = echartsStrategy;
}

private EchartStrategyContext() {
}

}
3.1.3 策略的工厂类【EchartsStrategyFactory】

/
*
*
*

*
*/
package com.ken.sys.common.factory.echarts;
import com.ken.sys.common.constant.EchartsConstant;
import com.ken.sys.common.strategy.echarts.*;
import com.ken.sys.common.strategy.echarts.base.EchartsStrategy;
import java.util.HashMap;
import java.util.Map;
/**

<ul>
<li>Title: EchartsStrategyFactory</li>
<li>Description: TODO </li>
<li>Copyright: Copyright (c) 2018</li>
<li>微信:tianji_vip</li>
</ul>

@author swc

@date 2020/7/3 0003 下午 15:07

*/
public class EchartsStrategyFactory {

public  static Map<String,EchartsStrategy> hashMap;
static {
    hashMap = new HashMap<String,EchartsStrategy>();
    hashMap.put(EchartsConstant.LINE,new EchartsLineStrategy());
    hashMap.put(EchartsConstant.BAR,new EchartsBarStrategy());
    hashMap.put(EchartsConstant.PIE,new EchartsPieStrategy());
    hashMap.put(EchartsConstant.FUNNEL,new EchartsFunnelStrategy());
    hashMap.put(EchartsConstant.GAUGE,new EchartsGaugeStrategy());
    hashMap.put(EchartsConstant.HEATMAP,new EchartsHeatMapStrategy());
}
public static EchartsStrategy getEchartsStrategy(String type) {
    return hashMap.get(type);
}

}
四、部分策略内容展示【这里是把策略封装在BaseStrategy里面作为公共部分】
file

BaseStrategy的相关方法
package com.ken.sys.common.strategy.echarts.base;

import com.ken.sys.common.entity.echarts.axis.EchartsXYAxis;
import com.ken.sys.common.entity.echarts.dto.HandEchartsDto;
import com.ken.sys.common.entity.echarts.legend.EchartsLegend;
import com.ken.sys.common.entity.echarts.option.EchartsOption;
import com.ken.sys.common.entity.echarts.series.EchartBaseSeries;
import com.ken.sys.common.entity.echarts.series.HeatMapSeries;
import com.ken.sys.common.entity.echarts.series.data.SeriesData;
import com.ken.sys.common.entity.echarts.series.property.SeriesAreaStyle;
import com.ken.sys.common.entity.echarts.series.property.SeriesItemStyle;
import com.ken.sys.common.entity.echarts.series.property.SeriesLabel;
import com.ken.sys.common.entity.echarts.series.property.SeriesLineStyle;
import com.ken.sys.common.entity.echarts.title.EchartsTitle;
import com.ken.sys.common.ifs.IEchartSeries;
import com.ken.sys.common.util.EmptyUtils;
import com.ken.sys.common.util.ReflectUtils;

import java.util.*;

/**

<ul>
<li>Title: BaseStrategy</li>
<li>Description: TODO </li>
</ul>

@author swc

@date 2020/7/3 0003 下午 15:57

*/
public class BaseStrategy {

//针对line和bar图像
public <T> EchartsOption createOptionForLineAndBar(IEchartSeries iEchartSeries,Class<? extends EchartBaseSeries> seriesClass, List<T> list, HandEchartsDto handEchartsDto){
    String xyAxisName = handEchartsDto.getxAxisDataName();

    Object[] legends = handEchartsDto.getLegends();

    Object[] fields =  handEchartsDto.getFields();

    List[] saveList = handEchartsDto.getSaveList();

    EchartsOption option =new EchartsOption();
    List<Object> xAxisDataList =new ArrayList<Object>();
    Map<String,List<Object>> map =new HashMap<String,List<Object>>();
    Number value =null;
    SeriesData data=null;
    String nameValue =null;
   try {
       for(T t:list){
           nameValue = ReflectUtils.getFieldValue(t,xyAxisName).toString();
           xAxisDataList.add(nameValue);

           for(int ind=0;ind<fields.length;ind++){
               value = (Number) ReflectUtils.getFieldValue(t,(String)fields[ind]);
               value = EmptyUtils.isNullOrEmpty(value)?0:value;
               data =new SeriesData();
               data.setValue(value);
               //设置单个数据 样式
               if(!EmptyUtils.isNullOrEmpty(iEchartSeries)){
                   iEchartSeries.setSeriesDataProp(data,new SeriesLabel(),new SeriesItemStyle(),new SeriesAreaStyle(),new SeriesLineStyle());
               }
               saveList[ind].add(data);
           }
       }

       //多个series
       List<EchartBaseSeries> mulseries =new ArrayList<EchartBaseSeries>();

       commonSetSeries(iEchartSeries, seriesClass, legends, fields, mulseries, saveList);

       EchartsLegend legend = new EchartsLegend();
       legend.setData(Arrays.asList(legends));

       EchartsXYAxis xAxis = new EchartsXYAxis();
       xAxis.setData(xAxisDataList);

       option.setLegend(legend);
       option.setxAxis(xAxis);
       option.setSeries(mulseries);
   }catch (Exception e){
        //实际换成日志打印
       e.printStackTrace();
   }
    return option;
}

//针对漏斗图、仪器图 和饼图图像
public <T> EchartsOption createOptionFGP(IEchartSeries iEchartSeries, Class<? extends EchartBaseSeries> seriesClass, List<T> list, HandEchartsDto handEchartsDto){
    EchartsOption option =new EchartsOption();
    String xyAxisName = handEchartsDto.getxAxisDataName();

    Object[] legends = handEchartsDto.getLegends();

    Object[] fields =  handEchartsDto.getFields();

    List[] saveList = handEchartsDto.getSaveList();

    boolean requireXAxis = handEchartsDto.getRequireXAxis();

    List<Object> xAxisDataList =new ArrayList<Object>();
    Map<String,List<Object>> map =new HashMap<String,List<Object>>();
    Number value =null;
    SeriesData data=null;
    String xAxisDataValue =null;

    try {
        for(T t:list){
            xAxisDataValue = ReflectUtils.getFieldValue(t,xyAxisName).toString();
            for(int ind=0;ind<fields.length;ind++){
                value = (Number) ReflectUtils.getFieldValue(t,(String)fields[ind]);
                value = EmptyUtils.isNullOrEmpty(value)?0:value;

                data =new SeriesData();
                data.setValue(value);

                data.setName(xAxisDataValue);
                xAxisDataList.add(xAxisDataValue);

                //设置单个数据 样式
                if(!EmptyUtils.isNullOrEmpty(iEchartSeries)){
                    iEchartSeries.setSeriesDataProp(data,new SeriesLabel(),new SeriesItemStyle(),new SeriesAreaStyle(),new SeriesLineStyle());
                }
                saveList[ind].add(data);
            }
        }

        List<EchartBaseSeries> mulseries =new ArrayList<EchartBaseSeries>();
        commonSetSeries(iEchartSeries, seriesClass, legends, fields, mulseries, saveList);

        EchartsLegend legend =new EchartsLegend();
        legend.setData(Arrays.asList(legends));

        EchartsXYAxis xAxis =new EchartsXYAxis();
        xAxis.setData(xAxisDataList);

        //需要x轴
        if(requireXAxis){
            option.setxAxis(xAxis);
        }
        option.setLegend(legend);
        option.setSeries(mulseries);
    }catch (Exception e){
        e.printStackTrace();
    }
    return option;
}





/**
 * 功能描述:  创建热力图的option
 * @param iEchartSeries 接口
 * @param t  对象
//     * @param titleFieldName
//     * @param subFieldName 对象里面需要处理的list数据
//     * @param xDimension 维度x轴
//     * @param yDimension 维度y
//     * @param xAxisDataName x轴需要展示的信息
//     * @param yAxisDataName y轴需要展示的信息
//     * @param showValField 需要展示数据的列
 * @return: java.util.Map<java.lang.String,java.lang.Object>
 * @author: swc
 * @date: 2020/7/2 0002 下午 12:52
 */
public static <T> EchartsOption createHeatMapOption(IEchartSeries iEchartSeries, T t, HandEchartsDto handEchartsDto) {
    EchartsOption option =new EchartsOption();
    List<EchartBaseSeries> seriesList =new ArrayList<EchartBaseSeries>();

    String titleFieldName = handEchartsDto.getTitleFieldName();

    String subFieldName = handEchartsDto.getSubFieldName();

    String xDimension = handEchartsDto.getxDimension();

    String yDimension =  handEchartsDto.getyDimension();

    String xAxisDataName = handEchartsDto.getxAxisDataName();

    String yAxisDataName =  handEchartsDto.getyAxisDataName();

    String showValField =  handEchartsDto.getShowValField();

    String showDateField =  handEchartsDto.getShowDateField();

    String coordinateSystem =  handEchartsDto.getCoordinateSystem();

    Map<String,Object> map =new HashMap<String,Object>();


    //标题
    String titleName =null;
    if(!EmptyUtils.isNullOrEmpty(titleFieldName)){
        titleName =  ReflectUtils.getFieldValue(t,titleFieldName).toString();
    }

    List subList  = (List)ReflectUtils.getFieldValue(t,subFieldName);

    Set<String> xAxisData =new TreeSet<String>();

    Set<String> yAxisData =new TreeSet<String>();

    //数据值---单个数据
    List seriesDataValue ;

    EchartBaseSeries echartBaseSeries = new HeatMapSeries();

    if("calendar".equals(coordinateSystem)){
        ((HeatMapSeries)echartBaseSeries).setCoordinateSystem("calendar");
        ((HeatMapSeries)echartBaseSeries).setCalendarIndex(handEchartsDto.getCalendarIndex());
    }


    List<SeriesData> seriesDataList = new ArrayList<SeriesData>();
    SeriesData seriesData =null;

    String xAxisValue =null;
    String yAxisValue =null;
    // 维度X
    String xDim = null;
    // 维度y
    String yDim = null;
    for(int i=0;i<subList.size();i++){
        seriesData =new SeriesData();

        if(!EmptyUtils.isNullOrEmpty(xDimension)){
            // 维度X
            xDim =  ReflectUtils.getFieldValue(subList.get(i),xDimension).toString();
        }

        if(!EmptyUtils.isNullOrEmpty(xDimension)){
            // 维度y
            yDim =  ReflectUtils.getFieldValue(subList.get(i),yDimension).toString();
        }


        //x轴的值
        if(!EmptyUtils.isNullOrEmpty(xAxisDataName)){
            xAxisValue =  ReflectUtils.getFieldValue(subList.get(i),xAxisDataName).toString();
            xAxisData.add(xAxisValue);
        }

        //y轴的值
        if(!EmptyUtils.isNullOrEmpty(yAxisDataName)){
            yAxisValue =  ReflectUtils.getFieldValue(subList.get(i),yAxisDataName).toString();
            yAxisData.add(yAxisValue);
        }

        seriesDataValue =new ArrayList();

        //目前支持cartesian2d出现x-y维度
        if("cartesian2d".equals(coordinateSystem)){
            seriesDataValue.add(xDim);
            seriesDataValue.add(yDim);
        }

        //coordinateSystem为calendar series里面的data-[value]为时间+某项值的数组
        if("calendar".equals(coordinateSystem)){
            Object showDate =EmptyUtils.isNullOrEmpty(showDateField)?0:ReflectUtils.getFieldValue(subList.get(i),showDateField);
            seriesDataValue.add(showDate);
        }


        Object showVal =EmptyUtils.isNullOrEmpty(showValField)?0:ReflectUtils.getFieldValue(subList.get(i),showValField);
        seriesDataValue.add(showVal);

        seriesDataValue.add(subList.get(i));

        //设置值
        seriesData.setValue(seriesDataValue);

// seriesData.setVisualMap(false);

        if(!EmptyUtils.isNullOrEmpty(iEchartSeries)){
            iEchartSeries.setSeriesDetailProp(echartBaseSeries,new SeriesLabel(),new SeriesItemStyle(),new SeriesAreaStyle(),new SeriesLineStyle());
            iEchartSeries.setSeriesDataProp(seriesData,new SeriesLabel(),new SeriesItemStyle(),new SeriesAreaStyle(),new SeriesLineStyle());
        }

        seriesDataList.add(seriesData);
        echartBaseSeries.setData(seriesDataList);
    }

    seriesList.add(echartBaseSeries);
    EchartsTitle title =new EchartsTitle();
    title.setText(titleName);

    EchartsXYAxis xAxis =new EchartsXYAxis();
    xAxis.setData(new ArrayList(xAxisData));
    option.setxAxis(xAxis);

    EchartsXYAxis yAxis =new EchartsXYAxis();
    yAxis.setData(new ArrayList(yAxisData));
    option.setyAxis(yAxis);

    option.setSeries(seriesList);

    return option;
}


/**
 * 功能描述:
 * @param iEchartSeries 接口
 * @param list 对象
//     * @param titleFieldName
//     * @param subFieldName 对象里面需要处理的list数据
//     * @param xDimension 维度x轴
//     * @param yDimension 维度y
//     * @param xAxisDataName x轴需要展示的信息
//     * @param yAxisDataName y轴需要展示的信息
//     * @param showValField 需要展示数据的列
 * @return: java.util.Map<java.lang.String,java.lang.Object>
 * @author: swc
 * @date: 2020/7/2 0002 下午 12:52
 */
public static <T> List<EchartsOption> createHeatMapOption(IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto) {
    List<EchartsOption> optionList =new ArrayList<EchartsOption>();
    String coordinateSystem =  handEchartsDto.getCoordinateSystem();

    //拼接不同年份日历的series的值
    List<EchartBaseSeries> seriesList =new ArrayList<EchartBaseSeries>();
    EchartsOption option = null;


    for(int i=0;i<list.size();i++){
        handEchartsDto.setCalendarIndex(i);
        //如果coordinateSystem 是 cartesian2d  默认为 多个[option]热力图
        if("cartesian2d".equalsIgnoreCase(coordinateSystem)){
            optionList.add(createHeatMapOption(iEchartSeries,list.get(i),handEchartsDto));
        }
        //如果coordinateSystem 是 calendar  默认为 日历 则是一个option的热力图  series的值为多个 而不是一个
        if("calendar".equalsIgnoreCase(coordinateSystem)){
            option = createHeatMapOption(iEchartSeries, list.get(i), handEchartsDto);
            seriesList.addAll(option.getSeries());
        }
    }

    if("calendar".equalsIgnoreCase(coordinateSystem)){
        option.setSeries(seriesList);
        optionList.add(option);
    }

    return optionList;
}





//公告的设置多个series的方法
private void commonSetSeries(IEchartSeries iEchartSeries, Class<? extends EchartBaseSeries> seriesClass, Object[] legends, Object[] fields, List<EchartBaseSeries> mulseries, List[] saveList) throws InstantiationException, IllegalAccessException {
    EchartBaseSeries echartBaseSeries;
    for (int ind = 0; ind < fields.length; ind++) {
        //获取指定的series
        echartBaseSeries = seriesClass.newInstance();
        echartBaseSeries.setName((String) legends[ind]);
        echartBaseSeries.setData(saveList[ind]);
        //设置整体样式[如一条折线或条状图的样式]
        if (!EmptyUtils.isNullOrEmpty(iEchartSeries)) {
            iEchartSeries.setSeriesDetailProp(echartBaseSeries, new SeriesLabel(), new SeriesItemStyle(), new SeriesAreaStyle(), new SeriesLineStyle());
        }
        mulseries.add(echartBaseSeries);
    }
}

}
五、为了方便最后写了工具类【EChartsNewUtil】把策略调用进行封装

注：1.这里主要看有注释的方法因为参数是最全的 2.关于IEchartSeries ,EchartsStrategy 这两类，IEchartSeries 是针对series的数据处理或添加修改样式（毕竟每个公司 /每个系统业务多多少少会有些不同），EchartsStrategy 这个是自定义你自己业务需求的策略（需要继承EchartsStrategy ，这个完全是重新定义这个方法 IEchartSeries 再次不起作用除非你自动代码回调到它）

5.1 HandEchartsDto是封装的参数，用于反射数据源的属性或处理部分业务

/
*
*
*

*
*/
package com.ken.sys.common.entity.echarts.dto;
import java.util.List;
/**

<ul>
<li>Title: HandEchartsDto</li>
<li>Description: TODO </li>
<li>微信:tianji_vip</li>
</ul>

@author swc

@date 2020/7/2 0002 下午 13:44

*/
public class HandEchartsDto {
// 该系列使用的坐标系，可选：
// 'cartesian2d'
// 使用二维的直角坐标系（也称笛卡尔坐标系），通过 xAxisIndex, yAxisIndex指定相应的坐标轴组件。
// 'geo'
// 使用地理坐标系，通过 geoIndex 指定相应的地理坐标系组件。
// ‘calendar’
// 使用日历坐标系

private String coordinateSystem ="cartesian2d";
//标题[主-列名]
private String titleFieldName;
//子对象的属性名[列名]
private String subFieldName;
//维度x轴[列名]
private String xDimension;
//维度y轴[列名]
private String yDimension;
//x轴需要展示的信息[列名]
private String xAxisDataName;
//y轴需要展示的信息[列名]
private String yAxisDataName;
//需要展示数据的列的属性名[时间列]
private String showDateField;
//需要展示数据的列的属性名[列名]
private String showValField;
//使用的日历坐标系的 index，在单个图表实例中存在多个日历坐标系的时候有用。
private int calendarIndex;
//legend的值
private Object[] legends;
//一般为legend 一一对应的属性项的值
private Object[] fields;
//一般为fields 一一对应的列的 单个serie的data里面的value值 一般为数组
private List[] saveList;
//是否需要x轴
private boolean requireXAxis =true;

//此处省略get set方法

}
package com.ken.sys.common.util;
import com.ken.sys.common.entity.echarts.dto.HandEchartsDto;
import com.ken.sys.common.entity.echarts.option.EchartsOption;
import com.ken.sys.common.factory.echarts.EchartsStrategyFactory;
import com.ken.sys.common.ifs.IEchartSeries;
import com.ken.sys.common.strategy.echarts.base.EchartsStrategy;
import com.ken.sys.common.strategycontext.echarts.EchartStrategyContext;

import java.util.*;

public class EChartsNewUtil {

/**
 * 功能描述: 
 * @param type 图形类别
 * @param iEchartSeries 外部接口 用于重写参数 或 样式等
 * @param list  数据源
 * @param handEchartsDto  需要处理的相应字段【list或list的子集里面】
 * @return: com.ken.sys.common.entity.echarts.option.EchartsOption
 * @param strategy  自定义的策略
 * @author: swc
 * @date: 2020/7/4 0:48
*/ 
public static <T>EchartsOption creatOption(String type, IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto, EchartsStrategy strategy) {
    //获取匹配的策略
    if(EmptyUtils.isNullOrEmpty(strategy)){
        strategy =EchartsStrategyFactory.getEchartsStrategy(type);
    }
    EchartStrategyContext context = new EchartStrategyContext(strategy);
    return context.createOption(iEchartSeries,list,handEchartsDto);
}

public static <T>EchartsOption creatOption(String type, List<T> list, HandEchartsDto handEchartsDto) {
    return creatOption(type,null,list,handEchartsDto,null);
}

public static <T>EchartsOption creatOption(String type, List<T> list, HandEchartsDto handEchartsDto,EchartsStrategy strategy) {
    return creatOption(type,null,list,handEchartsDto,strategy);
}

public static <T>EchartsOption creatOption(String type,IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto) {
    return creatOption(type,iEchartSeries,list,handEchartsDto,null);
}

/**
 * 功能描述:
 * @param type 图形类别
 * @param iEchartSeries 外部接口 用于重写参数 或 样式等
 * @param list  数据源
 * @param handEchartsDto  需要处理的相应字段【list或list的子集里面】
 * @param strategy  自定义的策略
 * @return: com.ken.sys.common.entity.echarts.option.EchartsOption
 * @author: swc
 * @date: 2020/7/4 0:48
 */
public static <T>List<EchartsOption> creatMulOptionForHeatMap(String type, IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto,EchartsStrategy strategy) {
    //获取匹配的策略
    if(EmptyUtils.isNullOrEmpty(strategy)){
        strategy =EchartsStrategyFactory.getEchartsStrategy(type);
    }
    EchartStrategyContext context = new EchartStrategyContext(strategy);
    return context.createMulOption(iEchartSeries,list,handEchartsDto);
}

public static <T>List<EchartsOption> creatMulOptionForHeatMap(String type, IEchartSeries iEchartSeries, List<T> list, HandEchartsDto handEchartsDto) {
    return creatMulOptionForHeatMap(type,iEchartSeries,list,handEchartsDto,null);
}


public static <T>List<EchartsOption> creatMulOptionForHeatMap(String type, List<T> list, HandEchartsDto handEchartsDto, EchartsStrategy strategy) {
    return creatMulOptionForHeatMap(type,null,list,handEchartsDto,strategy);
}

public static <T>List<EchartsOption> creatMulOptionForHeatMap(String type, List<T> list, HandEchartsDto handEchartsDto) {
    return creatMulOptionForHeatMap(type,null,list,handEchartsDto,null);
}

}

六、测试数据和测试该工具类

部分代码

//柱状图 折线图
@Test
public void barOrLine()throws Exception{
    String type=EChartsUtil.LINE;//BAR
    List<EchartsEntity> list= getData();

    Object[] legends ={"总金额","实付金额"};
    Object[] fields ={"nums1","nums2"};

    List[] saveList =new List[]{new ArrayList<BigDecimal>(),new ArrayList<BigDecimal>()};

    HandEchartsDto dto =new HandEchartsDto();

    dto.setxAxisDataName("name");
    dto.setLegends(legends);
    dto.setFields(fields);
    dto.setSaveList(saveList);

    EchartsOption option = EChartsNewUtil.creatOption(type, new IEchartSeries() {
        @Override
        public void setSeriesDetailProp(EchartBaseSeries series, SeriesLabel label, SeriesItemStyle itemStyle, SeriesAreaStyle areaStyle, SeriesLineStyle lineStyle) {

// ((BarSeries) series).setBarMaxWidth("60%");
// label.setShow(true);
// label.setPosition("top");
// series.setLabel(label);

        }

        @Override
        public void setSeriesDataProp(SeriesData seriesData, SeriesLabel label, SeriesItemStyle itemStyle, SeriesAreaStyle areaStyle, SeriesLineStyle lineStyle) {

        }
    }, list, dto);
    option.setSeries(null);
 
}

源码:https://gitee.com/ten-ken/jav... [先找测试类TestStrategyEcharts]

微信: tianji_vip

file

手把手教你用策略模式写echarts的配置项option

程序员ken

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