1，使用的jar包

         
     
      org.apache.commons
        
     
      commons-exec
        
     
      1.3
     
    
        
     
      com.github.abel533
         
     
      ECharts
         
     
      3.0.0.2
     
    
        
     
      com.google.code.gson
         
     
      gson
     
    
        
     
      com.github.abel533
         
     
      ECharts
         
     
      3.0.0.2
     
    

,2，创建要用的js（echarts-convert.js）

function Base64() {    // private property    _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";    // public method for encoding    this.encode = function (input) {        var output = "";        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;        var i = 0;        input = _utf8_encode(input);        while (i < input.length) {            chr1 = input.charCodeAt(i++);            chr2 = input.charCodeAt(i++);            chr3 = input.charCodeAt(i++);            enc1 = chr1 >> 2;            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);            enc4 = chr3 & 63;            if (isNaN(chr2)) {                enc3 = enc4 = 64;            } else if (isNaN(chr3)) {                enc4 = 64;            }            output = output +            _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +            _keyStr.charAt(enc3) + _keyStr.charAt(enc4);        }        return output;    }    // public method for decoding    this.decode = function (input) {        var output = "";        var chr1, chr2, chr3;        var enc1, enc2, enc3, enc4;        var i = 0;        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");        while (i < input.length) {            enc1 = _keyStr.indexOf(input.charAt(i++));            enc2 = _keyStr.indexOf(input.charAt(i++));            enc3 = _keyStr.indexOf(input.charAt(i++));            enc4 = _keyStr.indexOf(input.charAt(i++));            chr1 = (enc1 << 2) | (enc2 >> 4);            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);            chr3 = ((enc3 & 3) << 6) | enc4;            output = output + String.fromCharCode(chr1);            if (enc3 != 64) {                output = output + String.fromCharCode(chr2);            }            if (enc4 != 64) {                output = output + String.fromCharCode(chr3);            }        }        output = _utf8_decode(output);        return output;    }    // private method for UTF-8 encoding    _utf8_encode = function (string) {        string = string.replace(/\r\n/g,"\n");        var utftext = "";        for (var n = 0; n < string.length; n++) {            var c = string.charCodeAt(n);            if (c < 128) {                utftext += String.fromCharCode(c);            } else if((c > 127) && (c < 2048)) {                utftext += String.fromCharCode((c >> 6) | 192);                utftext += String.fromCharCode((c & 63) | 128);            } else {                utftext += String.fromCharCode((c >> 12) | 224);                utftext += String.fromCharCode(((c >> 6) & 63) | 128);                utftext += String.fromCharCode((c & 63) | 128);            }        }        return utftext;    }    // private method for UTF-8 decoding    _utf8_decode = function (utftext) {        var string = "";        var i = 0;        var c = c1 = c2 = 0;        while ( i < utftext.length ) {            c = utftext.charCodeAt(i);            if (c < 128) {                string += String.fromCharCode(c);                i++;            } else if((c > 191) && (c < 224)) {                c2 = utftext.charCodeAt(i+1);                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));                i += 2;            } else {                c2 = utftext.charCodeAt(i+1);                c3 = utftext.charCodeAt(i+2);                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));                i += 3;            }        }        return string;    }}///system = require('system'); // 获取参数var jspath = system.args[0];var base64JsonStr = system.args[1];//将base64解密var paramsJsonStr =  new Base64().decode(base64JsonStr) ;//转换为json对象var jsonObj = JSON.parse(paramsJsonStr);var option = jsonObj.opt ;var width = jsonObj.width ;var height = jsonObj.height ;var outfile = jsonObj.outfile ;var fileSuffix = jsonObj.type ;function Convert(params){    this.params = params ;    this.external = {        JQUERY3 :  'jquery-1.9.1.min.js',        ECHARTS3 : 'echarts3.8.5.min.js'    }; // 外部js    this.page = require('webpage').create(); // 客户端    this.page.onConsoleMessage = function(msg, lineNum, sourceId) {        console.log('----console----'+msg);    };    var instance = this ;    this.page.onError = function(msg, trace) {        var msgStack = ['PHANTOM ERROR: ' + msg];        if (trace && trace.length) {             msgStack.push('TRACE:');             trace.forEach(function(t) {               msgStack.push(' -> ' + (t.file || t.sourceURL) + ': ' + t.line + (t.function ? ' (in function ' + t.function +')' : ''));             });         }        console.error(msgStack.join('\n'));        instance.output("", false, msg); // 失败,返回错误信息    };}Convert.prototype.init = function(){    var instance = this ;    instance.page.open("about:blank", function(status) {        // 注入依赖js包        var hasJquery = instance.page.injectJs(instance.external.JQUERY3);        var hasEchart = instance.page.injectJs(instance.external.ECHARTS3);        // 检查js是否引用成功        if (!hasJquery || !hasEchart) {            output("Could not found " + external.JQUERY3 + " or " + external.ECHARTS3, false);        }        // 创建echarts        instance.page.evaluate(instance.createEchartsDom, instance.params);        // 定义剪切范围，如果定义则截取全屏        instance.page.clipRect = {            top : 0,            left : 0,            width : instance.params.width,            height : instance.params.height        };        // 渲染        var result = instance.render();        // 成功输出，返回图片或其他信息        instance.output(result, true);    });}Convert.prototype.render = function(){    var instance = this ;    switch (instance.params.type) {    case 'file':        // 渲染图片        instance.page.render(instance.params.outfile);        return instance.params.outfile;    case 'base64':    default:        var base64 = instance.page.renderBase64('PNG');        return base64;    }}Convert.prototype.output = function(content, success, msg) {    var instance = this ;    console.log(success ? "[SUCCESS]:" : "[ERROR]:" + content);    instance.page.close();    instance.exit(instance.params); // exit};Convert.prototype.exit = function (params) {    phantom.exit();};// // 创建eCharts Dom层 // @param params 参数 //         params.opt //     params.width     //     params.height //     params.outfile //     params.type = 'PNG' //Convert.prototype.createEchartsDom = function(params) {    console.log("---createEchartsDom--"+params.width) ;    var instance = this ;    options =  params.opt ;    // 动态加载js，获取options数据    $('

3，Java代码

public class ImageRenderParams {    //echart的Option    public Option opt;    //echart图片的宽度    public int width = 600;    //echart图片的高度    public int height = 400;    //echart图片保存地址    public String outfile = "d:/dsafdf.png";    //file 或者  PNG    public String type = "file";}/**     * 创建Echart图     *     * @param imagePath 图片保存地址，例如：d:/demo.png     * @throws Exception     */    public ImageResult createEchartImage(Option option) throws Exception {        if (option == null) {            return new ImageResult();        }        String imgPath = getRandomImagePath(option);        ImageRenderParams params = new ImageRenderParams();        params.opt = option;        params.outfile = imgPath;        // 实例化        Gson gson = new Gson();        // 将map转成JSON        String paramsJsonStr = gson.toJson(params);        Base64 base64 = new Base64();        //转换为base64编码是为了防止执行指令的时候出问题        String base64Str = base64.encodeToString(paramsJsonStr.getBytes("UTF-8"));        //调用的JS文件路径        File jsFile = ResourceUtils.getFile("classpath:static/js/echarts-convert.js");        // 生成的图片名称        String jsFilePath = jsFile.getAbsolutePath();        String[] args = new String[3];        args[0] = jsFilePath;        args[1] = base64Str;        // 执行脚本        try {            CommandExecUtil.phantomjsExec(args);        } catch (Exception e) {            throw e;        }        return new ImageResult(imgPath);    }    public static class ImageResult {        private String imagePath;        private byte[] imageData;        public ImageResult(String imagePath) {            this.imagePath = imagePath;        }        public ImageResult() {        }        public String getImagePath() {            return imagePath;        }        public byte[] getImageData() throws Exception {            if (StringUtils.isBlank(imagePath)) {                return null;            }            if (imageData != null) {                return imageData;            }            File file = ResourceUtils.getFile(imagePath);            if (file == null) {                return null;            }            FileInputStream fi = new FileInputStream(file);            imageData = new byte[fi.available()];            fi.read(imageData);            fi.close();            return imageData;        }    }

CommandExecUtil.java

public static int phantomjsExec(String[] args) {        try {            return CommandExecUtil.exec("scripts/phantomjs", args, null);        } catch (Exception e) {            e.printStackTrace();        }        return -1;    }    public static int exec(String command, String[] args, Map
    
      substitutionMap) throws Exception {        CommandLine cmdLine = new CommandLine(command);        if (args != null && args.length > 0) {            for (String arg : args) {                cmdLine.addArgument(arg);            }        }        if (substitutionMap != null) {            cmdLine.setSubstitutionMap(substitutionMap);        }        DefaultExecutor executor = new DefaultExecutor();        // executor.setExitValue(1);        // ExecuteWatchdog watchdog = new ExecuteWatchdog(60000);        // executor.setWatchdog(watchdog);        int exitValue = executor.execute(cmdLine);        return exitValue;    }