前段时间的一个项目用到了地图的打印功能。当时遇到了一个GraphicLayer中TextSymbol汉字打印乱码和文字在地图中过大的问题，后来经过分析发现，汉字乱码是中文字体的原因，文字太大是由于DPI参数设置过高导致的。下面是dpi为96和300的对比图片：
附上源码：
<!DOCTYPE html><html><head><meta charset="utf-8"/><meta content="" name="description"><meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1"><meta name="renderer" content="webkit"><title>地图打印DPI测试</title><link rel="stylesheet" href="/3.14/dijit/themes/claro/claro.css"><link rel="stylesheet" href="/3.14/esri/css/esri.css"><style>html,body{margin: 0;width: 100%;height: 100%;;}#map{width: 100%;height: 100%;;}#PrinterDiv{position: absolute;top: 0px;right: 0px;;width: 120px;height: 100px;background-color: #fff;border: 1px solid #ddd;text-align: center;line-height: 30px;padding: 10px;;}</style></head><body><div id="map"></div><div id="PrinterDiv"><span style="width: 100%;font-weight: bold;text-align: left">设置打印DPI：</span><input id="dpi" style="width: 100%" value="96"><button id="print">打印</button></div></body><script src="/3.14/"></script><script type="text/javascript">require(["esri/map","esri/dijit/Print","esri/tasks/PrintTask","esri/tasks/PrintParameters","esri/tasks/PrintTemplate","esri/symbols/TextSymbol","esri/symbols/Font","esri/graphic","esri/geometry/Point","esri/symbols/SimpleMarkerSymbol","esri/symbols/SimpleLineSymbol","esri/Color","dojo/domReady!"],function(Map,Print,PrintTask,PrintParameters,PrintTemplate,TextSymbol,Font,Graphic,Point,SimpleMarkerSymbol,SimpleLineSymbol,Color){var map = new Map("map", {center: [-118, 34.5],zoom: 8,basemap: "topo"});map.on("load", function() {var point = new Point(-118,34.5);var symbols_point = new SimpleMarkerSymbol("square", 10, new SimpleLineSymbol(), new Color([0, 255, 0, 0.75]));var graphic = new Graphic(point, symbols_point);map.graphics.add(graphic);var symbols_text = new TextSymbol("测试DPI").setColor(new Color([128,0,0])).setAlign(Font.ALIGN_START).setFont(new Font("12pt").setWeight(Font.WEIGHT_BOLD).setFamily("微软雅黑")).setOffset(5, 5) ;var graphic = new Graphic(point, symbols_text);map.graphics.add(graphic);});var button = document.getElementById("print");button.onclick = function(){var printTask = new PrintTask("/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export%20Web%20Map%20Task");var template = new PrintTemplate();var dpi = document.getElementById("dpi").value ;template.exportOptions = {width: 800,height: 600,dpi: Number(dpi)};template.format = "PDF";template.layout = "MAP_ONLY";template.preserveScale = false;var params = new PrintParameters();params.map = map;params.template = template;printTask.execute(params, function(evt){window.open(evt.url,"_blank");});}});</script></html>
