java之页面调用flash录音并上传服务器（swfObject+springMvc）

首先所需要的文件：swfObject.js+recorder.js+SpringMvc相关文件+main.js(flash录音频相关参数设置)

顺着逻辑从前向后看；首先看一下页面 的jsp文件：

关键代码部分：

<div id="wrap"><div class="container"><div class="row"><div class="col-xs-12 col-sm-12 col-md-12 col-lg-12"><div class="qcontainer"><div id="recorder-audio" class="control_panel idle"><button class="record_button" title="Record" id = "start_record" ><img src="../WUI/qrecord/images/record.png" alt="开始录音"></button><button class="stop_recording_button"onclick="FWRecorder.stopRecording('audio');"title="Stop Recording"><img src="../WUI/qrecord/images/stop.png" alt="停止录音"></button><button class="play_button"onclick="FWRecorder.playBack('audio');" title="Play"><img src="../WUI/qrecord/images/play.png" alt="播放"></button><button class="pause_playing_button"onclick="FWRecorder.pausePlayBack('audio');"title="Pause Playing"><img src="../WUI/qrecord/images/pause.png" alt="暂停"></button><button class="stop_playing_button"onclick="FWRecorder.stopPlayBack();" title="Stop Playing"><img src="../WUI/qrecord/images/stop.png" alt="停止"></button><div class="level"></div></div><div class="details"><button class="show_level" onclick="FWRecorder.observeLevel();">显示声波</button><button class="hide_level"onclick="FWRecorder.stopObservingLevel();"style="display: none;">隐藏声波</button><button class="show_settings" onclick="microphonePermission()">麦克风权限</button><span id="save_button" style="display: inline-block;"> <objectdata="../WUI/qrecord/recorder.swf" name="recorderApp"id="recorderApp" type="application/x-shockwave-flash"height="24" width="24"><paramvalue="upload_image=../WUI/qrecord/images/upload.png"name="flashvars"></object></span><div id="status">最后的录音事件：ready</div><div>录音时长：<span id="duration"></span></div><div>上传状态：<span id="upload_status"></span></div><input value="" id="qrecordId" type="hidden"></div><!-- 这个form的action写上传路径 --><form id="uploadForm" name="uploadForm" action="upload1"></form></div></div></div></div><div id="push"></div></div>

所有的对应的图片位置按照自己项目具体位置而定，里面比较重要的几个参数的id 一个是最终提交的form表单的ID=‘uploadForm’和<object>中的recorderApp 还有其他的flash操作的id。

引入swfObject.js是操作flash的js库。recorder.js中定义了Recorder对象，定义了对应的方法。

引入之后便可触发dom里面的onclick方法：例如：<button class="play_button"onclick="FWRecorder.playBack('audio');" title="Play"><img="../WUI/qrecord/images/play.png" alt="播放"></button>

需要注意的是：①上面的录音按钮没有添加onclick时间，目的是为了方便自定义音频的文件名，我使用的是jquery，对文件名进行自定义：代码如下：

<script type="text/javascript">$("#start_record").on("click",function(){var doc_id = 332;var page_id = 1;FWRecorder.record('audio', 'project_'+doc_id+"_"+page_id);}); </script>

②如果使用jquery的话，引用的顺序需在SWFObject和recorder之前，否则会报错。说是没有找到jquery，因为dom流进行加载的顺序是自上而下，所以jquery在后面的话，前面的js库会因为找不到文件而报错。

然后是main.js文件

$(function () {  var $uploadStatus = $('#upload_status'),    $showLevelButton = $('.show_level'),    $hideLevelButton = $('.hide_level'),    $level = $('.control_panel .level');  var CLASS_CONTROLS = "control_panel";  var CLASS_RECORDING = "recording";  var CLASS_PLAYBACK_READY = "playback_ready";  var CLASS_PLAYING = "playing";  var CLASS_PLAYBACK_PAUSED = "playback_paused";//  Embedding flash object ---------------------------------------------------------------------------------------------  var appWidth = 24;  var appHeight = 24;  var flashvars = {'upload_image': '../WUI/qrecord/images/upload.png'};  var params = {};  var attributes = {'id': "recorderApp", 'name': "recorderApp"};  swfobject.embedSWF("../WUI/qrecord/recorder.swf", "flashcontent", appWidth, appHeight, "11.0.0", "", flashvars, params, attributes);//  Handling FWR events ------------------------------------------------------------------------------------------------   window.fwr_event_handler = function fwr_event_handler() {    $('#status').text("最后的录音事件：" + arguments[0]);    var name, $controls;    switch (arguments[0]) {      case "ready":        var width = parseInt(arguments[1]);        var height = parseInt(arguments[2]);        FWRecorder.uploadFormId = "#uploadForm";        FWRecorder.uploadFieldName = "record_file";        FWRecorder.connect("recorderApp", 0);        FWRecorder.recorderOriginalWidth = width;        FWRecorder.recorderOriginalHeight = height;        $('.save_button').css({'width': width, 'height': height});        break;      case "no_microphone_found":        break;      case "microphone_user_request":        recorderEl().addClass("floating");        FWRecorder.showPermissionWindow();        break;      case "microphone_connected":        FWRecorder.isReady = true;        $uploadStatus.css({'color': '#000'});        break;      case "permission_panel_closed":        FWRecorder.defaultSize();        recorderEl().removeClass("floating");        break;      case "recording":        name = arguments[1];        $controls = controlsEl(name);        FWRecorder.hide();        setControlsClass($controls, CLASS_RECORDING);        break;      case "recording_stopped":        name = arguments[1];        $controls = controlsEl(name);        var duration = arguments[2];        FWRecorder.show();        setControlsClass($controls, CLASS_PLAYBACK_READY);        $('#duration').text(duration.toFixed(4) + " seconds");        break;      case "microphone_level":        $level.css({width: arguments[1] * 50 + '%'});        break;      case "observing_level":        $showLevelButton.hide();        $hideLevelButton.show();        break;      case "observing_level_stopped":        $showLevelButton.show();        $hideLevelButton.hide();        $level.css({width: 0});        break;      case "playing":        name = arguments[1];        $controls = controlsEl(name);        setControlsClass($controls, CLASS_PLAYING);        break;      case "playback_started":        name = arguments[1];        var latency = arguments[2];        break;      case "stopped":        name = arguments[1];        $controls = controlsEl(name);        setControlsClass($controls, CLASS_PLAYBACK_READY);        break;      case "playing_paused":        name = arguments[1];        $controls = controlsEl(name);        setControlsClass($controls, CLASS_PLAYBACK_PAUSED);        break;      case "save_pressed":        FWRecorder.updateForm();        break;      case "saving":        name = arguments[1];        break;      case "saved":        name = arguments[1];        var data = $.parseJSON(arguments[2]);        if (data.saved) {          $('#upload_status').css({'color': '#0F0'}).text(name + " was saved");          $('#qrecordId').val(data.id);        } else {          $('#upload_status').css({'color': '#F00'}).text(name + " was not saved");        }        break;      case "save_failed":        name = arguments[1];        var errorMessage = arguments[2];        $uploadStatus.css({'color': '#F00'}).text(name + " failed: " + errorMessage);        break;      case "save_progress":        name = arguments[1];        var bytesLoaded = arguments[2];        var bytesTotal = arguments[3];        $uploadStatus.css({'color': '#000'}).text(name + " progress: " + bytesLoaded + " / " + bytesTotal);        break;    }  };//  Helper functions ---------------------------------------------------------------------------------------------------  function setControlsClass($controls, className) {    $controls.attr('class', CLASS_CONTROLS + ' ' + className);  }  function controlsEl(name) {    return $('#recorder-' + name);  }  function recorderEl() {    return $('#recorderApp');  }//  Button actions -----------------------------------------------------------------------------------------------------  window.microphonePermission = function () {    recorderEl().addClass("floating");    FWRecorder.showPermissionWindow({permanent: true});  };  window.configureMicrophone = function () {    if (!FWRecorder.isReady) {      return;    }    FWRecorder.configure($('#rate').val(), $('#gain').val(), $('#silenceLevel').val(), $('#silenceTimeout').val());    FWRecorder.setUseEchoSuppression($('#useEchoSuppression').is(":checked"));    FWRecorder.setLoopBack($('#loopBack').is(":checked"));  };});

这是网上的一个demo例子，因为现在是调研阶段没有进行具体的代码开发，里面逻辑不是很复杂，其他的不用太过关注，主要注意的是下面几点：

① FWRecorder.uploadFormId = "#uploadForm";  ID对应的是form表单的ID，不能出错。
        FWRecorder.uploadFieldName = "record_file";   Form表单提交之后，后台controller获取的数据的name值。
        FWRecorder.connect("recorderApp", 0); object中对应的ID。
②里面对应的图片地址也相应的对应自己项目的位置。

③代码中编写了简单的样式设计，自己开发过程中需要按照自己需求进行设计。

最后是后台代码部分：

代码：

@RequestMapping(value = "upload1", method = RequestMethod.POST)@ResponseBodypublic String up(HttpServletRequest request, @RequestParam("record_file") MultipartFile file) throws Exception {if (file.isEmpty() == false) {Date currentTime = new Date();String dateString = formatter.format(currentTime);System.err.println(dateString);File tfile = new File("D://test//record//"+file.getOriginalFilename() + "_" + dateString + ".wav");file.transferTo(tfile);return "{\"saved\":\"1\"}";}else{return "{\"save_failed\":\"1\"}";}}

后台使用的是注解的方式，取到文件之后保存指定位置。

返回的是一个json字符串，具体的识别逻辑在main.js中有写：如：

case "saved":        name = arguments[1];        var data = $.parseJSON(arguments[2]);        if (data.saved) {          $('#upload_status').css({'color': '#0F0'}).text(name + " was saved");          $('#qrecordId').val(data.id);        } else {          $('#upload_status').css({'color': '#F00'}).text(name + " was not saved");        }        break;

最后貌似这里面不能直接上传文件；大家按照我说的步骤将swfObject文件保存下来：下面文件全部复制之后，新建一个js文件，将内容全部复制进去就能使用了。

首先是SWFObject：

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然后是recorder.js

(function(global) {  var Recorder;  var RECORDED_AUDIO_TYPE = "audio/wav";  Recorder = {    recorder: null,    recorderOriginalWidth: 0,    recorderOriginalHeight: 0,    uploadFormId: null,    uploadFieldName: null,    isReady: false,    connect: function(name, attempts) {      if(navigator.appName.indexOf("Microsoft") != -1) {        Recorder.recorder = window[name];      } else {        Recorder.recorder = document[name];      }      if(attempts >= 40) {        return;      }      // flash app needs time to load and initialize      if(Recorder.recorder && Recorder.recorder.init) {        Recorder.recorderOriginalWidth = Recorder.recorder.width;        Recorder.recorderOriginalHeight = Recorder.recorder.height;        if(Recorder.uploadFormId && $) {          var frm = $(Recorder.uploadFormId);           Recorder.recorder.init(frm.attr('action').toString(), Recorder.uploadFieldName, frm.serializeArray());        }        return;      }      setTimeout(function() {Recorder.connect(name, attempts+1);}, 100);    },    playBack: function(name) {      // TODO: Rename to `playback`      Recorder.recorder.playBack(name);    },    pausePlayBack: function(name) {      // TODO: Rename to `pausePlayback`      Recorder.recorder.pausePlayBack(name);    },        playBackFrom: function(name, time) {      // TODO: Rename to `playbackFrom`      Recorder.recorder.playBackFrom(name, time);    },    record: function(name, filename) {      Recorder.recorder.record(name, filename);    },    stopRecording: function() {      Recorder.recorder.stopRecording();    },    stopPlayBack: function() {      // TODO: Rename to `stopPlayback`      Recorder.recorder.stopPlayBack();    },    observeLevel: function() {      Recorder.recorder.observeLevel();    },    stopObservingLevel: function() {      Recorder.recorder.stopObservingLevel();    },    observeSamples: function() {      Recorder.recorder.observeSamples();    },    stopObservingSamples: function() {      Recorder.recorder.stopObservingSamples();    },    resize: function(width, height) {      Recorder.recorder.width = width + "px";      Recorder.recorder.height = height + "px";    },    defaultSize: function() {      Recorder.resize(Recorder.recorderOriginalWidth, Recorder.recorderOriginalHeight);    },    show: function() {      Recorder.recorder.show();    },    hide: function() {      Recorder.recorder.hide();    },    duration: function(name) {      // TODO: rename to `getDuration`      return Recorder.recorder.duration(name || Recorder.uploadFieldName);    },    getBase64: function(name) {      var data = Recorder.recorder.getBase64(name);      return 'data:' + RECORDED_AUDIO_TYPE + ';base64,' + data;    },    getBlob: function(name) {      var base64Data = Recorder.getBase64(name).split(',')[1];      return base64toBlob(base64Data, RECORDED_AUDIO_TYPE);    },    getCurrentTime: function(name) {    return Recorder.recorder.getCurrentTime(name);    },    isMicrophoneAccessible: function() {      return Recorder.recorder.isMicrophoneAccessible();    },    updateForm: function() {      var frm = $(Recorder.uploadFormId);       Recorder.recorder.update(frm.serializeArray());    },    showPermissionWindow: function(options) {      Recorder.resize(240, 160);      // need to wait until app is resized before displaying permissions screen      var permissionCommand = function() {        if (options && options.permanent) {          Recorder.recorder.permitPermanently();        } else {          Recorder.recorder.permit();        }      };      setTimeout(permissionCommand, 1);    },    configure: function(rate, gain, silenceLevel, silenceTimeout) {      rate = parseInt(rate || 22);      gain = parseInt(gain || 100);      silenceLevel = parseInt(silenceLevel || 0);      silenceTimeout = parseInt(silenceTimeout || 4000);      switch(rate) {      case 44:      case 22:      case 11:      case 8:      case 5:        break;      default:        throw("invalid rate " + rate);      }      if(gain < 0 || gain > 100) {        throw("invalid gain " + gain);      }      if(silenceLevel < 0 || silenceLevel > 100) {        throw("invalid silenceLevel " + silenceLevel);      }      if(silenceTimeout < -1) {        throw("invalid silenceTimeout " + silenceTimeout);      }      Recorder.recorder.configure(rate, gain, silenceLevel, silenceTimeout);    },    setUseEchoSuppression: function(val) {      if(typeof(val) != 'boolean') {        throw("invalid value for setting echo suppression, val: " + val);      }      Recorder.recorder.setUseEchoSuppression(val);    },    setLoopBack: function(val) {      if(typeof(val) != 'boolean') {        throw("invalid value for setting loop back, val: " + val);      }      Recorder.recorder.setLoopBack(val);    }  };  function base64toBlob(b64Data, contentType, sliceSize) {    contentType = contentType || '';    sliceSize = sliceSize || 512;    var byteCharacters = atob(b64Data);    var byteArrays = [];    for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {      var slice = byteCharacters.slice(offset, offset + sliceSize);      var byteNumbers = new Array(slice.length);      for (var i = 0; i < slice.length; i++) {        byteNumbers[i] = slice.charCodeAt(i);      }      var byteArray = new Uint8Array(byteNumbers);      byteArrays.push(byteArray);    }    return new Blob(byteArrays, {type: contentType});  }  global.FWRecorder = Recorder;})(this);