紧接着前面两篇，本篇采用Freemarker模板来生成Echarts图片。
一. 项目结构
二. Freemarker模板
(1)柱状图
{
"title": {
"text": "${title}",
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
}
},
"tooltip": {
"formatter": "{a}<br/>{b} : {c}",
"show": true
},
"legend": {
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
},
"data": ["${legend}"]
},
"xAxis": [{
"type": "category",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"lineStyle":{
"color": "#315070",
"width":4
}
},
"data": ${category}
}],
"yAxis": [{
"type": "value",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"lineStyle":{
"color":"#315070",
"width":4
}
}
}],
"series": [{
"name": "${legend}",
"data": ${values},
"type": "bar",
"label": {
"normal": {
"color": "green",
"fontSize": 15,
"fontWeight": "bolder",
"show": true,
"position": "top"
}
}
}]
}(2)渐变色柱状图
{
"title": {
"text": "${title}",
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
}
},
"toolbox": {
"feature": {},
"show": true
},
"tooltip": {
"formatter": "{a}<br/>{b} : {c}",
"show": true
},
"legend": {
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
},
"data": ["${legend}"]
},
"xAxis": [{
"type": "category",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"lineStyle":{
"color":'#315070',
"width":4
}
},
"data": ${category}
}],
"yAxis": [{
"type": "value",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"show":true,
"lineStyle":{
"color":'#315070',
"width":4
}
},
"axisTick": {
"show": true
}
}],
"series": [{
"name": "${legend}",
"type": "bar",
"label": {
"normal": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder",
"show": true,
"position": "top"
}
},
"data":${values},
"itemStyle": "__itemStyle"
}]
}(3)折线图
{
"title": {
"text": "${title}",
"subtext": "",
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
},
"x": "left"
},
"tooltip": {
"trigger": "axis"
},
"legend": {
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
},
"data": ["${legend}"]
},
"xAxis": [{
"type": "category",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"lineStyle":{
"color":"#315070",
"width":4
}
},
"boundaryGap": false,
"data": ${category}
}],
"yAxis": [{
"type": "value",
"axisLabel": {
"show": true,
"textStyle": {
"fontSize": 15,
"fontWeight": "bolder"
}
},
"axisLine":{
"lineStyle":{
"color":"#315070",
"width":4
}
}
}],
"series": [{
"smooth": true,
"dataFilter": "nearest",
"lineStyle": {
"color": "red",
"width": 4
},
"legendHoverLink": true,
"name": "${legend}",
"type": "line",
"stack": "总量",
"symbolSize": "15",
"showAllSymbol": true,
"label": {
"normal": {
"color": "green",
"show": true,
"position": "right"
}
},
"data": ${values}
}]
}(4)饼图
{
"calculable": true,
"legend": {
"data": ${types},
"orient": "vertical",
"x": "left",
"textStyle": {
"color": "red",
"fontSize": 15,
"fontWeight": "bolder"
}
},
"series": [{
"center": ["50%", "60%"],
"data": ${datas},
"name": "${title}",
"radius": "65%",
"type": "pie",
"avoidLabelOverlap": true,
"label": {
"normal": {
"show": true,
"position": "top",
"textStyle": {
"color":"red",
"fontSize": "15",
"fontWeight": "bold"
}
},
"emphasis": {
"show": true,
"textStyle": {
"fontSize": "20",
"fontWeight": "bold"
}
}
},
"labelLine": {
"normal": {
"show": true
}
}
}],
"title": {
"subtext": "",
"text": "${title}",
"x": "center",
"textStyle": {
"color": "green",
"fontSize": 20,
"fontWeight": "bolder"
}
},
"toolbox": {
"feature": {
"mark": {
"lineStyle": {
"color": "#1e90ff",
"type": "dashed",
"width": 2
},
"show": true
},
"dataView": {
"lang": ["数据视图", "关闭", "刷新"],
"readOnly": false,
"show": true,
"title": "数据视图"
},
"magicType": {
"show": true,
"title": {
"bar": "柱形图切换",
"stack": "堆积",
"tiled": "平铺",
"line": "折线图切换"
},
"type": ["pie", "funnel"]
},
"restore": {
"show": true,
"title": "还原"
},
"saveAsImage": {
"lang": ["点击保存"],
"show": true,
"title": "保存为图片",
"type": "png"
}
},
"show": true
},
"tooltip": {
"formatter": "{a} <br/>{b} : {c} ({d}%)",
"trigger": "item"
}
}三.插件js（
(1)echarts-util-one.js
phantom.outputEncoding = "gbk";// 为防止输出中文时出现乱码，可设置输出编码格式,写在最顶部
var params = require('system');// 获取系统参数
var server = require('webserver').create(); // 服务端
var port = params.args[3];// 端口,与启动命令有关,不一定是3
var listen = server.listen(port, function(request, response) {// 监听端口
var args = serverGetArgs(request);// 得到网络请求参数
args.response = response;
methodDis(args);
});
var jslib = {
jquery : phantom.libraryPath + '/lib/jquery-3.2.1.min.js',
echarts : phantom.libraryPath + '/lib/echarts.min.js',
china : phantom.libraryPath + '/lib/china.js',
};
/**
* 请求分发
*
* @author liansh
* @data 2019年9月19日 下午11:32:59
* @param args
*/
function methodDis(args) {
if (args.reqMethod == "table") {
table(args);
} else if (args.reqMethod == "echarts") {
echarts(args);
}
if (args.exit == "true") {
writeResponse(args.response, {
error_no : 0
});
phantom.exit();
}
}
function table(args) {
var page = require('webpage').create();// 打开页面
// 设置分辨率
page.viewportSize = {
width : 1000,
height : 1200
};
// 打开页面
page.open(args.url || 'http://127.0.0.1:8080/hello', function(status) {
if (status == "fail") {
writeResponse(args.response, {
error_no : -1
});
return;
}
page.injectJs(jslib.jquery);
var tableheight = page.evaluate(function() {
return $('body').height() + 20;
});
// 定义剪切范围
page.clipRect = {
top : 0,
left : 0,
width : 1000,
height : tableheight
};
// var base64 = 'data:image/png;base64,' + page.renderBase64('png');
page.render(args.file);// 将整个page保存为文件,可以是png，jpg, gif,pdf
page.close();
writeResponse(args.response, {
error_no : 0
});
});
page.onError = function(msg, trace) {
writeResponse(args.response, {
error_no : -1,
error_info : trace
});
};
}
function echarts(args) {
var page = require('webpage').create(); // 客户端
page.open("about:blank", function(status) {// 空白页
/**
* 报错{"file":"undefined","line":3,"function":""},{"file":"","line":18,"function":""}
* "file":"undefined" 为所引用的jslib文件路径不对,需要重新检查路径
*/
page.injectJs(jslib.jquery);
page.injectJs(jslib.echarts);
page.injectJs(jslib.china);
var pageBody = page.evaluate(function(args) {
// 动态加载js，获取options数据 实现渐变效果
var itemStyle = '{"normal":{"color" : new echarts.graphic.LinearGradient(0, 0, 0, 1, [ '
+ '{offset : 0, color : "#83bff6"}, {offset : 0.5,color : "#188df0"}, {offset : 1,color : "#188df0"} ])}}';
// 动态加载js，获取options数据
$('<script>').attr('type', 'text/javascript').html('var options =' //
+ JSON.stringify(args.opt).replace('\"__itemStyle"', itemStyle)).appendTo(document.head);
// 取消动画,否则生成图片过快，会出现无数据
if (options !== undefined) {
options.animation = false;
}
// body背景设置为白色
$(document.body).css('backgroundColor', 'white');
// echarts容器
var container = $("<div>").attr('id', 'container').css({
width : args.width,
height : args.height
}).appendTo(document.body);
var eChart = echarts.init(container[0]);
eChart.setOption(options);
}, args);
// 定义剪切范围
page.clipRect = {
top : 0,
left : 0,
width : args.width - 100,
height : args.height + 10
};
// var base64 = 'data:image/png;base64,' + page.renderBase64('png');
// writeResponse(args.response, {// 返回给http请求
// error_no : 0,
// base64 : base64
// });
page.render(args.file);// 将整个page保存为文件,可以是png，jpg, gif,pdf
page.close();
writeResponse(args.response, {
error_no : 0
});
});
page.onError = function(msg, trace) {
writeResponse(args.response, {
error_no : -1,
error_info : trace
});
};
}
function writeResponse(response, msg) {
response.write(JSON.stringify(msg || {
error_no : 0
}));
response.close();
}
/**
* 获取请求参数
*
* @author liansh
* @data 2019年9月19日 下午11:27:16
* @param request
* @returns
*/
function serverGetArgs(request) {
var args = {};
if ('GET' === request.method) {
var index = request.url.indexOf('?');
if (index !== -1) {
pairs = request.url.substr(index + 1).split("&");
for (var i = 0; i < pairs.length; i++) {
var pos = pairs[i].indexOf('=');
if (pos === -1)
continue;
var key = pairs[i].substring(0, pos);
var value = pairs[i].substring(pos + 1);
// 中文解码，必须写两层
value = decodeURIComponent(decodeURIComponent(value));
args[key] = value;
}
}
} else if ('POST' === request.method) {
args = JSON.parse(request.post);
}
args.width = args.width || 1000;
args.height = args.height || 400;
return args;
};另外涉及到的js(jquery-3.2.1.min.js echarts.min.js china.js) 请到https://gitee.com/saintlee/echartsconvert/tree/master 这里下载。
说明：echarts-util-one.js是重新改造的，之前是利用echartsconvert这个插件来生成图表的，但是echartsconvert这个插件不能生成饼图，所以就改造了echarts-util-one.js
三.环境配置说明
可以结合前面两篇看，首先安装phantomjs-2.1.1-windows，然后在其bin目录下，放入echarts-util-one.js以及相关lib包下的js(jquery-3.2.1.min.js echarts.min.js china.js)，然后启动服务即可，命令如下：
D:\>cd D:\softpack\echarts\phantomjs-2.1.1-windows\bin D:\softpack\echarts\phantomjs-2.1.1-windows\bin>phantomjs D:\softpack\echarts\phantomjs-2.1.1-windows\bin\echarts-util-one.js -s -p 6668
四.测试效果
环境配置完成之后，启动服务，swagger文档：http://localhost:8095/swagger-ui.html
测试数据：
（1）柱状图
{
"barParamList": {
"barName": [
"A罩杯", "B罩杯", "C罩杯", "D罩杯", "E罩杯", "F罩杯","G罩杯"
],
"barValue": [
43364, 13899, 12000, 2181, 21798, 1796, 1300
],
"legendName": "胸罩图例"
},
"horizontal": true,
"title": "胸罩使用人数"
}（2）折线图
{
"horizontal": true,
"lineParam": {
"legendName": "胸罩图例",
"xdatas": [
[
43364, 13899, 12000, 2181, 21798, 1796, 1300
]
],
"ydatas": [
"A罩杯", "B罩杯", "C罩杯", "D罩杯", "E罩杯", "F罩杯","G罩杯"
]
},
"title": "胸罩使用人数"
}（3）饼图
{
"datas": [
43364, 13899, 12000, 2181, 21798, 1796, 1300
],
"title": "胸罩图例",
"types": [
"A罩杯", "B罩杯", "C罩杯", "D罩杯", "E罩杯", "F罩杯","G罩杯"
]
}效果展示：
渐变色柱状图
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