介绍一款web端的截图工具

 

牛牛截图，web端的一款截图工具，下面是代码及实例。

依赖jquery-1.7.min.js

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/******************************************************************************* 牛牛截图的JS部分的核心流程封装在此文件中，绝大部分情况下，您不需要修改此文件中的JS内容，它已经包含了在所有浏览器上应用 牛牛截图所需要的所有代码，您只需要去修改capturewrapper.js，将相应的函数修改成与您的UI匹配的即可 *******************************************************************************/   /*******************************************************************************/ //设置截图的参数  var emPensize = 1;      //设置画笔大小 var emDrawType = 2;     //设置是腾讯风格还是360风格 0： 腾讯风格   1： 360风格 var emTrackColor = 3;       //自动识别的边框的颜色 var emEditBorderColor = 4;  //文本输入的边框颜色 var emTransparent = 5;      //工具栏的透明度 var emWindowAware = 6;      //设置是否禁用随着DPI放大 var emSetSaveName = 8;      //设置保存时的开始文字     免费版本无效 var emSetMagnifierBkColor = 9; //设置放大镜的背景色，不设置则透明 var emSetMagnifierLogoText = 10; //设置放大镜上的LOGO字符，可提示快捷键，如： 牛牛截图(CTRL + SHIFT + A)     免费版本无效 var emSetWatermarkPictureType = 20;                     //设置水印的类型 var emSetWatermarkPicturePath = 21;                     //设置水印的路径 var emSetWatermarkTextType = 22;                        //设置水印文字的类型 var emSetWatermarkTextValue = 23;                       //设置水印文字的字符串 var emSetMosaicType = 24;               //指定马赛克的类型，1为矩形，2为画线 var emSetTooltipText = 25;               //用于设置工具栏图标的TOOLTIP文字 var emSetMoreInfo = 26;                         //设置额外的信息，用于特殊需求 /*******************************************************************************/     var emClosed = 1; var emConnected = 2; var emConnecting = 3;   var emCaptureSuccess = 0; var emCaptureFailed = 1; var emCaptureUnknown = 2;   var emCmdReady = -1; var emCmdCapture = 0; var emCmdSaveFile = 1;     function isMacintosh() {   return navigator.platform.indexOf('Mac') > -1; }   function rgb2value(r, g, b) {     return r | g << 8 | b << 16; }   var captureObjSelf = null; function onpluginLoaded() {     captureObjSelf.pluginLoaded(); }   function NiuniuCaptureObject() {     var self = this;     captureObjSelf = this;     this.PenSize = 2;     this.DrawType = 0;     this.TrackColor = rgb2value(255, 0, 0);     this.EditBorderColor = rgb2value(255, 0, 0);     this.Transparent = 240;     this.WindowAware = 1;     this.MosaicType = 1;     this.SaveName = "保存";     this.MagnifierLogoText = "截图";     this.WatermarkPictureType = "2|100|100|400|400|20";     this.WatermarkPicturePath = "";     this.WatermarkTextType = "2|100|100|100|40|20|0|150|30|80,55,55,55";     this.WatermarkTextValue = "";     this.NiuniuAuthKey = "";     this.ToolTipText = "";  //tipRectangle|tipCircle|tipArrow|tipBrush|tipGlitter|tipMosaic|tipText|tipUndo|tipSave|tipCancel|tipFinish|txtFinish     this.MoreInfo = "1,100|300|600";           this.useCustomizedProtoco = true;   //是否使用浏览器自定义协议加websocket           this.IsWaitCustomizedCallBack = false;     this.autoConnectAfterPageLoad = true;     this.IsFirstConnect = true;     this.IsEverConnected = false;     this.reconnectTryTime = 0;     this.TimeIntervalID = -1;     this.ReceivedEchoBack = false;           this.Version = "1.0.0.0";     this.hostPort = "30101,30102";     this.hostPortIndex = 0;     this.CaptureName = "NiuniuCapture";      this.NiuniuSocket = null;     this.connectState = emClosed;           this.SocketTimeStamp = new Date().getTime();     this.TimeOutID = -1;           this.FinishedCallback = null;     this.PluginLoadedCallback = null;     this.VersionCallback = null;     this.OnConnectFailed = function(isReconnect)     {         self.WriteLog(isReconnect ? "reconnect failed, the capture control process is exit." : "connect failed at the first time.");     }           this.LoadPlugin = function()     {         var obj = $('#capturecontainer');         if(obj.length < 1)         {             $("body").append('<div id="capturecontainer" style="height:0px;width:0px;"></div>');             obj = $('#capturecontainer');         }                obj.html('');         obj.html('<object id="niuniuCapture" type="application/x-niuniuwebcapture" width="0" height="0"><param name="onload" value="onpluginLoaded" /></object>');                   var iframeObj = $('startCaptureFrame');         if(iframeObj.length < 1)         {             $("body").append('<iframe id="startCaptureFrame" style="display:none;"></iframe>');                 }     }           this.niuniuCapture = function ()     {         return document.getElementById('niuniuCapture');     }               this.addEvent = function(obj, name, func)     {         if (obj.attachEvent) {             obj.attachEvent("on"+name, func);         } else {             obj.addEventListener(name, func, false);         }     }           this.pluginValid = function()     {         try         {             if(self.niuniuCapture().valid)             {                 return true;             }         }         catch(e)         {         }         return false;            }       this.OnCaptureFinished = function(x, y, width, height, content,localpath)     {         self.OnCaptureFinishedEx(1, x, y, width, height, "", content,localpath);          }           this.OnCaptureFinishedEx = function(type, x, y, width, height, info, content,localpath)     {         //交给上层去处理截图完成后的事项         if(self.FinishedCallback != null)         {             self.FinishedCallback(type, x, y, width, height, info, content,localpath);         }         else         {             alert("截图完成的事件未绑定，将不能对图片进行处理，请指定FinishedCallback回调函数");         }     }           this.pluginLoaded = function()     {         self.GetVersion();         if(!self.pluginValid())         {             if(self.PluginLoadedCallback != null)             {                 self.PluginLoadedCallback(false);             }             return false;         }                     //此函数必需调用，传递正确的参数，且必需先于其他函数调用          self.niuniuCapture().InitCapture(self.NiuniuAuthKey);                   self.niuniuCapture().InitParam(emPensize, self.PenSize);         self.niuniuCapture().InitParam(emDrawType, self.DrawType);         self.niuniuCapture().InitParam(emTrackColor, self.TrackColor);         self.niuniuCapture().InitParam(emEditBorderColor, self.EditBorderColor);         self.niuniuCapture().InitParam(emTransparent, self.Transparent);                    self.niuniuCapture().InitParam(emSetSaveName, self.SaveName);                    self.niuniuCapture().InitParam(emSetMagnifierLogoText, self.MagnifierLogoText);         self.niuniuCapture().InitParam(emSetMosaicType, self.MosaicType);                   //设置工具栏上的按钮TOOLTIP          self.niuniuCapture().InitParam(emSetTooltipText, self.ToolTipText);                   self.niuniuCapture().InitParam(emSetMoreInfo, self.MoreInfo);         //niuniuCapture().InitParam(23, "测试文字.");         //此BASE64字符串表示牛牛默认的水印图片，可以替换        // niuniuCapture().InitParam(21, "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");          //注：以上设置LOGO及保存名的接口，免费版本无效                   //添加控件的事件监听         self.addEvent(self.niuniuCapture(), 'CaptureFinishedEx', self.OnCaptureFinishedEx);         //以下这个事件主要是用于兼容旧的浏览器控件的事件通知         self.addEvent(self.niuniuCapture(), 'CaptureFinished', self.OnCaptureFinished);                             if(self.PluginLoadedCallback != null)         {             self.PluginLoadedCallback(true);         }     }           this.SetWatermarkPicture = function(watermarPicData)     {           self.WatermarkPicturePath = watermarPicData;           //设置测试的水印图片的Base64字符串，此操作应该是在页面加载中处理比较合适           if(!self.pluginValid())             return;           self.niuniuCapture().InitParam(emSetWatermarkPicturePath, self.WatermarkPicturePath);                  self.niuniuCapture().InitParam(emSetWatermarkPictureType, self.WatermarkPictureType);     }       this.SetWatermarkText = function(watermarkText)     {         self.WatermarkTextValue = watermarkText;         //设置测试的水印文字，此操作应该是在页面加载中处理比较合适         if(!self.pluginValid())             return;         //nShowType|nMinWidth|nMinHeight|nVerticalInterval|nOffset|nFontSize|nIsBold|nTextWidth|nTextHeight|colorText          self.niuniuCapture().InitParam(emSetWatermarkTextValue, self.WatermarkTextValue);          self.niuniuCapture().InitParam(emSetWatermarkTextType, self.WatermarkTextType);     }                 this.SavePicture = function(savename)     {          if(self.pluginValid())          {             self.niuniuCapture().SavePicture(savename);          }     }           this.GetCursorPosition = function()     {         if(self.pluginValid())         {             var val = self.niuniuCapture().GetCursorPosition();             return val;         }         return "";     }               this.NewCaptureParamObject = function(defaultpath, hideCurrWindow, autoCaptureFlag, x, y, width, height)     {          var obj = new Object();         obj.CmdType = 1;         obj.IsGBK = 0;              //是否是GBK编码，这样会涉及到编码转换          obj.AuthKey = self.NiuniuAuthKey;  //                               obj.Pensize = self.PenSize;     //设置画笔大小         obj.DrawType = self.DrawType;           //设置是腾讯风格还是360风格         obj.TrackColor= self.TrackColor;        //自动识别的边框的颜色         obj.EditBorderColor= self.EditBorderColor;  //文本输入的边框颜色         obj.Transparent = self.Transparent;     //工具栏的透明度         obj.SetSaveName = self.SaveName;                                    //设置保存时的开始文字         obj.SetMagnifierLogoText = self.MagnifierLogoText;                      //设置放大镜上的LOGO字符           obj.SetWatermarkPictureTypeEx = self.WatermarkPictureType;                      //设置水印的类型         obj.SetWatermarkPicturePath = self.WatermarkPicturePath;                        //设置水印的路径         obj.SetWatermarkTextTypeEx=self.WatermarkTextType;                          //设置水印文字的类型         obj.SetWatermarkTextValue= self.WatermarkTextValue;                     //设置水印文字         obj.MosaicType = self.MosaicType;          //设置马赛克的类型         obj.SetToolbarText = self.ToolTipText;         obj.MoreInfo = this.MoreInfo;         //以下是截图时传递的参数         obj.DefaultPath = defaultpath;         obj.HideCurrentWindow = hideCurrWindow;         obj.AutoCaptureFlag = autoCaptureFlag;         obj.x = x;         obj.y = y;         obj.Width = width;         obj.Height = height;         return obj;     }           this.DoCapture = function(name, hide, AutoCapture, x, y, width, height)     {                if(self.IsNeedCustomizedProtocol())         {              return self.DoCaptureForCustomize(name, hide, AutoCapture, parseInt(x), parseInt(y), parseInt(width), parseInt(height));         }                            if(!self.pluginValid())         {             return emCaptureFailed;         }         self.niuniuCapture().Capture(name, hide, AutoCapture, x, y, width, height);         return emCaptureSuccess;                }        this.InitNiuniuCapture = function()     {         self.LoadPlugin();         setTimeout("captureObjSelf.InitWebSocketAndBindCallback();", 200);     }               this.InitWebSocketAndBindCallback = function()     {         if(!self.autoConnectAfterPageLoad || !self.IsNeedCustomizedProtocol())         {             return;         }         self.connectHost();     }           this.getNextPort = function()     {         //init port params flag         //进行拆分处理 self.hostPort;         var portArray = self.hostPort.split(",");         if(portArray.length < 1)         {             alert("服务端口为空");             return 30101;         }         if(self.hostPortIndex < 0)         {             self.hostPortIndex = 0;                     }         if(self.hostPortIndex > portArray.length - 1)         {             self.hostPortIndex = portArray.length - 1;                      }         var nPort = parseInt(portArray[self.hostPortIndex]);         self.hostPortIndex++;         if(self.hostPortIndex > portArray.length - 1)         {             self.hostPortIndex = 0;                     }           return nPort;     }           this.connectHost = function()     {             if(self.NiuniuSocket != null)             {                 self.WriteLog("connectHost NiuniuSocket is not null, return.");                 return;             }             clearTimeout(self.TimeOutID);             self.connectState = emConnecting;                                         try{                 var wshosts = ['127.0.0.1', 'localhost'];                 for (var i in wshosts) {                     try{                         var host = "ws://127.0.0.1:" + self.getNextPort() + "/" + self.CaptureName;                         self.NiuniuSocket = new WebSocket(host);                         break;                     }                     catch(ee){                         var ggg= 0;                     }                 }                                                   //OutputLog('Socket Status: '+socket.readyState);                 self.NiuniuSocket.onopen = function(evt){                                       self.NiuniuSocket.send('0' + self.SocketTimeStamp);                     self.WriteLog("NiuniuSocket.onopen.");                     clearTimeout(self.TimeOutID);                 }                                   self.NiuniuSocket.onmessage = function(msg){                     var str = "";                     str = msg.data;                     var id  = str.substr(0, 1);                     var arg1 = str.substr(1);                     clearTimeout(self.TimeOutID);                     if(id == "0"){                         self.hostPortIndex--;                         //表示连接成功，此时应该提示可以截图了                         self.connectState = emConnected;                         self.pluginLoaded();                         self.IsEverConnected = true;                         self.IsFirstConnect = false;                         if(self.IsWaitCustomizedCallBack)                         {                             setTimeout("captureObjSelf.SendReadyRecvData();", 3);                         }                         self.WriteLog("connect sucess.");                         self.ReceivedEchoBack = true;                         clearInterval(self.TimeIntervalID);                         self.TimeIntervalID = setInterval("captureObjSelf.LoopEchoMessage()", 3000);                     }                     if(id == "1"){                         //解析消息                         var _aoResult = eval("(" + arg1 + ")");                         self.ReceivedEchoBack = true;                         if(_aoResult.command == "echo")                         {                                               self.WriteLog("received echo");                             return;                         }                         self.WriteLog("received capturedata.");                         if(_aoResult.command == "version")                         {                             self.WriteLog(_aoResult.Ver);                             self.VersionCallback(_aoResult.Ver);                         }                         else{                             self.OnCaptureFinishedEx(_aoResult.Type, _aoResult.x, _aoResult.y, _aoResult.Width, _aoResult.Height, _aoResult.Info, _aoResult.Content, _aoResult.LocalPath);                                              }                     }                                                                       }                                   self.NiuniuSocket.onclose = function(evt){                     self.OnWebSocketError("self.NiuniuSocket.onclose." + evt.data);                 }                   self.NiuniuSocket.onerror = function (evt) {                                        //self.OnWebSocketError("self.NiuniuSocket.onerror." + evt.data);                   };                                   } catch(e){                 self.OnWebSocketError("connect exception." + e.message);             }     }           this.WriteLog = function(txt)     {         //写日志         try{             console.log(txt);         }         catch(e)         {                       }     }           this.OnWebSocketError = function(type)     {               //如果不处于连接成功状态，说明不是断开连接，而是连接失败         var isConnectedFailed = false;         if(self.connectState != emConnected)         {             isConnectedFailed = true;         }         self.WriteLog(type);         self.ReceivedEchoBack = false;         self.connectState = emClosed;                         if(self.NiuniuSocket != null)         {             self.NiuniuSocket.close();         }                   self.NiuniuSocket = null;         clearTimeout(self.TimeOutID);         clearInterval(self.TimeIntervalID);                   if(isConnectedFailed)         {             if(self.IsFirstConnect)             {                 self.IsFirstConnect = false;                 if(self.OnConnectFailed != null)                 {                     self.OnConnectFailed(false);                    }                 return;             }                           if(self.IsEverConnected)             {                 self.reconnectTryTime++;                 //通知连接连接断开                 if(self.reconnectTryTime > 3)                 {                     self.IsEverConnected = false;                     self.reconnectTryTime = 0;                     if(self.OnConnectFailed != null)                     {                         self.OnConnectFailed(true);                     }                               return;                 }             }         }                   self.TimeOutID = setTimeout("captureObjSelf.connectHost();", 800);     }           this.LoopEchoMessage = function()     {         if(!self.ReceivedEchoBack)         {             self.OnWebSocketError("this.LoopEchoMessage, !self.ReceivedEchoBack");             self.ReceivedEchoBack = false;             clearInterval(self.TimeIntervalID);             self.TimeIntervalID = setInterval("captureObjSelf.LoopEchoMessage()", 3000);             return;         }         self.ReceivedEchoBack = false;         clearTimeout(self.TimeOutID);         if(self.connectState != emConnected)         {             clearInterval(self.TimeIntervalID);             return;         }               var obj = new Object();         obj.command = "echo";         self.NiuniuSocket.send("1" + encodeURIComponent( $.toJSON(obj)) );          }           this.SendReadyRecvData = function()     {         self.WriteLog("SendReadyRecvData.");         var obj = self.NewCaptureParamObject("", 0, 0, 0, 0, 0, 0);         obj.CmdType = -1;         self.NiuniuSocket.send("1" + encodeURIComponent( $.toJSON(obj)) );     }       this.DoCaptureForCustomize = function(name, hide, AutoCapture, x, y, width, height)     {         var obj = self.NewCaptureParamObject(name, hide, AutoCapture, x, y, width, height);         try         {             //启动客户端，或者通过websocket去发送数据               if(self.connectState == emConnected)             {                 var json = $.toJSON(obj);                 self.NiuniuSocket.send('1' + encodeURIComponent(json) );             }             else             {                 //首次启动时，不支持水印，否则会过长                 obj.SetWatermarkPicturePath = "";                 //obj.SetWatermarkTextValue = "";                   var json = $.toJSON(obj);                 self.WriteLog(json.length);                 var newUrl = self.CaptureName + "://" + encodeURIComponent(json);                 self.WriteLog(newUrl.length);                                   //启动客户端                  $('#startCaptureFrame').attr('src', newUrl);                                   self.IsWaitCustomizedCallBack = true;                 self.connectHost();                 return emCaptureUnknown;             }                           return emCaptureSuccess;         }         catch(e)         {             alert(e.message);         }          return emCaptureUnknown;           }                 this.IsNeedCustomizedProtocol = function()     {         if(isMacintosh())         {             return true;         }         if(!self.useCustomizedProtoco)         {             return false;         }                   if(self.pluginValid())         {             return false;         }                   try         {             var agent = window.navigator.userAgent.toLowerCase();                        var isQQBrowser = agent.indexOf("qqbrowser") != -1;             //if(isQQBrowser)             //{             //    return false;             //}             var isUBrowser = agent.indexOf("ubrowser") != -1;             if(isUBrowser)             {                 return false;             }             var isChrome = agent.indexOf("chrome") != -1;             if(isChrome)             {                 if(chrome&&chrome.runtime)                 {                     return true;                 }             }             //如果是firefox 且在50版本以上，则需要              var brow=$.browser;             if(brow.mozilla)             {                 return true;             }             var isEdge = agent.indexOf("edge") != -1;             if(isEdge)             {                 return true;             }             return false;         }         catch(e)         {         }         return false;        }           this.GetVersion = function()     {         if(self.IsNeedCustomizedProtocol())         {             if(self.connectState != emConnected)             {                 return;             }                   var obj = new Object();             obj.command = "version";             self.NiuniuSocket.send("1" + encodeURIComponent( $.toJSON(obj)) );             return;         }                            if(!self.pluginValid())         {             return;         }         var verSion = self.niuniuCapture().GetVersion();         self.VersionCallback(verSion);         self.WriteLog(verSion);     } }

　　capturewrapper.js

　　

+ View Code?

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var savedPictureContent = ''; var extendName = ''; var captureObj = null; var downloadUrl = 'http://www.ggniu.cn/download/CaptureInstall.exe';   /* 用于初始化牛牛截图控件，此函数需要在页面加载完成后立即调用 在此函数中，您可以设置相关的截图的UI控制，如，画笔大小、边框颜色等等 【这部分信息在niuniucapture.js中也有默认值，直接修改默认值也可 】 */ function Init() {     if(isMacintosh())     {         downloadUrl = 'http://www.ggniu.cn/download/CaptureInstall.dmg';     }     captureObj = new NiuniuCaptureObject();     captureObj.NiuniuAuthKey = "niuniu";     //此处可以设置相关参数     captureObj.TrackColor = rgb2value(255, 0, 0);     captureObj.EditBorderColor = rgb2value(0, 0, 255);           //设置工具栏的TOOLTIP     //captureObj.ToolTipText = "tipRectangle|tipCircle|tipArrow|tipBrush|tipGlitter|tipMosaic|tipText|tipUndo|tipSave|tipCancel|tipFinish|Finish";           //设置控件加载完成以及截图完成的回调函数     captureObj.FinishedCallback = OnCaptureFinishedCallback;     captureObj.PluginLoadedCallback = PluginLoadedCallback;     captureObj.VersionCallback = VersionCallback;           //初始化控件     captureObj.InitNiuniuCapture(); }   //用于返回控件的版本号 function VersionCallback(ver) {     //captureObj.Version;     //可以在此根据最新的版本号与控件返回的版本号对比，决定是否要提示升级      //alert(ver); } /* 当控件成功加载后回调的的函数，您可以在此控制相应的UI显示  */ function PluginLoadedCallback(success) {     if(success)     {         $('#info').html('');         $('#imgshow').hide();         $('#imgshow').attr('src', "./image/loading.gif?v=1");         $('#btnReload').hide();         $('#btnCapture').show();     } }   //根据是否是Chrome新版本来控制下载不同的控件安装包 function ShowDownLoad() {     $('#info').html('如果超过5秒无响应，请点此<a target="_blank" href="' + downloadUrl + '" + date.getMinutes() + date.getSeconds()">安装</a>'); }   /* 当提示安装控件后，需要重新加载控件来使用截图； 也有部分是需要刷新浏览器的 */ function ReloadPlugin() {     captureObj.LoadPlugin();     $('#btnReload').hide();     $('#btnCapture').show();     if(captureObj.pluginValid())     {         $('#downloadNotice').hide();         $('#info').html("截图控件已经安装完毕，您可以进行截图了。");     }     else     {         var browserInfo = "查看控件是否被浏览器阻止，或通过浏览器设置中的加载项查看NiuniuCapture是否加载并正常运行";         $('#info').html('截图控件未能识别到，请按如下步骤检查:<br/>1. 确定您已经下载控件安装包并正常安装 <br/>2. ' + browserInfo             + '<br/>3. 刷新页面或重新启动浏览器试下<br/>4. 如果仍旧不能截图，出大招吧：'             + '<a target="_blank" style="color:#ff0000;" class="btn" href="http://shang.qq.com/wpa/qunwpa?idkey=a9dab7a14df03d19a2833e6b5f17a33639027d06213cf61bdb7554b04492b6e5">一键加群求助</a>');     } }   /* 截图入口函数，用于控制UI标签的显示 */ function StartCapture() {           $('#imgshow').hide();     $('#imgshow').attr('src', "./image/loading.gif?v=1");     var captureRet = Capture();     //从返回值来解析显示     if(captureRet == emCaptureFailed)     {         ShowDownLoad();     }     else if(captureRet == emCaptureUnknown){         $('#info').html('正在截图中, 如果超过5秒无响应，请点此<a target="_blank" href="' + downloadUrl + '" + date.getMinutes() + date.getSeconds()">安装</a>');     } }   /* 此函数是根据在测试页面上的不同选项来进行截图，在实际应用中，您只需要根据您实际需要的截图模式，传入相应的参数即可 */ function Capture() {     var defaultName = "1.jpg"; //此处为了防止上传的数据过大，建议使用JPG格式     var hideFlag = $("#hideCurrent").attr("checked")=="checked" ? 1 : 0;     var autoFlag = $("#captureselectSize").attr("checked")=="checked" ? 1 : 0;     var captureRet = true;     if(autoFlag == 0)     {         return captureObj.DoCapture("1.jpg", hideFlag, 0, 0, 0, 0, 0);     }     else     {         autoFlag = $('#getimagefromclipboard').is(':checked') ? 4 : 1;         if(autoFlag == 4)         {             return captureObj.DoCapture("", 0, 4, 0, 0, 0, 0);         }         autoFlag = $('#showprewindow').is(':checked') ? 3 : 1;         if(autoFlag == 3)         {             //此时如果x, y, width, height全为0，则表示预截图窗口点击“开始截图”时，手工先把区域             //x, y, width, height全为1，则表示预截图窗口点击“开始截图”时，自动截取整个桌面             //其他情况，则自动截取 x, y, width, height 指定的区域             return captureObj.DoCapture("1.jpg", hideFlag, 3, 0, 0, 0, 0);         }         autoFlag = $('#fullscreen').is(':checked') ? 2 : 1;         if(autoFlag == 2)         {             return captureObj.DoCapture("1.jpg", hideFlag, 2, 0, 0, 0, 0);         }         else         {             return captureObj.DoCapture("1.jpg", hideFlag, 1, $('#xpos').val(), $('#ypos').val(), $('#width').val(), $('#height').val());         }     } }   /* 此处是截图后的回调函数，用于将截图的详细信息反馈回来，你需要调整此函数，完成图像数据的传输与显示  */ function OnCaptureFinishedCallback(type, x, y, width, height, info, content,localpath) {     if(type < 0)     {         //需要重新安装控件         ShowDownLoad();         return;     }     $('#show').hide();     switch(type)     {         case 1:         {             $('#info').html('截图完成： x:' + x + ',y:' + y + ',widht:' + width + ',height:' + height);             UploadCaptureData(content, localpath);             break;         }         case 2:         {             $('#info').html('您取消了截图');             break;         }         case 3:         {             $('#info').html('您保存了截图到本地： x:' + x + ',y:' + y + ',widht:' + width + ',height:' + height);             UploadCaptureData(content, localpath);             break;         }         case 4:         {             if(info =='0')             {                 $('#info').html('从剪贴板获取到了截图： ' + localpath);                 UploadCaptureData(content, localpath);             }             else             {                 $('#info').html('从剪贴板获取图片失败。');             }             break;         }     } }   //控制上传 function UploadCaptureData(content, localpath) {     savedPictureContent = content;           //获取图片的扩展名     var pos = localpath.lastIndexOf('.');     extendName = localpath.substr(pos + 1);           $('#show').html('截图已经完成，请点击');     $('#show').show();     var autoUpload = $("#autoupload").attr("checked")=="checked" ? 1 : 0;     if(autoUpload)     {         UploadData();     }     else     {         $('#btnUpload').show();     } }     /* 实际上传图像数据的函数，此处主要是将BASE64的图像数据，通过AJAX的方式POST到服务器保存成文件，并且显示在页面上 */ function UploadData() {     $('#show').html('截图完成，正在上传，请稍后...');     $('#btnUpload').hide();     //上传的数据除了图片外，还可以包含自己需要传递的参数     var data = "userid=test111&extendname=" + extendName + "&picdata=" + encodeURIComponent(savedPictureContent);           $.ajax({         type: "POST",         url: "./upload.ashx",         dataType: "json",         data: data,         success: function (obj) {             if(obj.code==0)             {                 $('#show').html('上传成功，图片地址：' + obj.info);                 $('#imgshow').show();                 $('#imgshow').attr('src', obj.info);             }             else             {                 $('#show').html('上传失败 :' + obj.info);             }         },         error : function(){$('#show').html('由于网络原因，上传失败。'); }     }); }   function TestSetWatermarkPicture() {     captureObj.SetWatermarkPicture("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"); }

　　jquery.josn.js

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在页面执行下就ok了，

<script>
        Init()
 </script>