zoukankan html css js c++ java

HTML5+Java(Spring下) 拍照上传图片

使用支持html5的浏览器，找个有摄像头，再建一个文件接收base64字串的图片然后保存就哦了

<html>
<head runat="ReYo-Server">
    <title></title>
    <script language="javascript" type="text/javascript" src="js/jquery-1.11.2.min.js"></script>
    <script language="javascript" type="text/javascript">
        window.addEventListener('DOMContentLoaded', function () {
            'use strict';
            var video = document.querySelector('video');

            function successCallback(stream) {
                // Set the source of the video element with the stream from the camera
                if (video.mozSrcObject !== undefined) {
                    video.mozSrcObject = stream;
                } else {
                    video.src = (window.URL && window.URL.createObjectURL(stream)) || stream;
                }
                video.play();
            }

            function errorCallback(error) {
                console.error('An error occurred: [CODE ' + error.code + ']');
                // Display a friendly "sorry" message to the user
            }

            navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
            window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;

            // Call the getUserMedia method with our callback functions
            if (navigator.getUserMedia) {
                navigator.getUserMedia({ video: true }, successCallback, errorCallback);
            } else {
                console.log('Native web camera streaming (getUserMedia) not supported in this browser.');
                // Display a friendly "sorry" message to the user
            }
        }, false);

    </script>
</head>
<body>

    <video id="myVideo" autoplay="autoplay" Width="400px" Height="300px"></video>
    <br />
    <input type="button" value="拍照" /><br />
    拍照結果：
    <div id="result">
    </div>
    <script type="text/javascript">
        $(document).ready(init);
        function init() {
            //Google Chrome要用webkitGetUserMedia函式 
            //navigator.webkitGetUserMedia("video", success);  //显示影像 

            //定义button
            $("input[type='button']").click(function () {
                shoot(); //执行拍照 
            });
        }

        function success(stream) {
            $("#myVideo").attr("src", window.webkitURL.createObjectURL(stream));
        }

        //執行拍照 
        function shoot() {
            var video = $("#myVideo")[0];
            var canvas = capture(video);

            $("#result").empty();
            $("#result").append(canvas); //呈現图像(拍照結果) 

            var imgData = canvas.toDataURL("image/jpg");
            var base64String = imgData.substr(22); //取得base64字串 

            //上傳，儲存图片  
            $.ajax({
                url: "uploadImagerReYo",
                type: "post",
                //base64String
                data: { urls: imgData  },
                async: true,
                success: function (htmlVal) {
                    alert("另存图片成功！");
                }, error: function (e) {
                    alert(e.responseText); //alert错误信息  
                }
            });
        }

        //从video元素抓取图像到canvas 
        function capture(video) {
            var canvas = document.createElement('canvas'); //建立canvas js DOM元素 
            canvas.width = video.videoWidth;
            canvas.height = video.videoHeight;
            var ctx = canvas.getContext('2d');
            ctx.drawImage(video, 0, 0);
            return canvas;
        } 

    </script>
</body>
</html>

界面：

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原文地址：https://www.cnblogs.com/interdrp/p/4934398.html