前端关键代码：
//自定义样式<style type="text/css">
#webcam { border: 1px solid #666666; width: 320px; height: 240px; }
#photos { border: 1px solid #666666; width: 320px; height: 240px; }
.btn { width: 320px; height: auto; margin: 5px 0px; }
.btn input[type=button] { width: 150px; height: 50px; line-height: 50px; margin: 3px; }
</style>
//展示内容
<div id="webcam"></div>
<div class="btn">
<input type="button" value="删除" id="delBtn" onclick="delPhoto();"/>
<input type="button" value="拍照" id="saveBtn" onclick="savePhoto();"/>
</div>
<div id="photos">
<img src="" id="img">
</div>
//js
<script type="text/javascript" src="jquery.webcam.min.js"></script>
<script type="text/javascript">
$(function () {
var w = 320, h = 240;
var pos = 0, ctx = null, saveCB, image = [];
var canvas = document.createElement("canvas");
canvas.setAttribute('width', w);
canvas.setAttribute('height', h);
console.log(canvas.toDataURL);
if (canvas.toDataURL) {
ctx = canvas.getContext("2d");
image = ctx.getImageData(0, 0, w, h);
saveCB = function(data) {
var col = data.split(";");
var img = image;
for(var i = 0; i < w; i++) {
var tmp = parseInt(col[i]);
img.data[pos + 0] = (tmp >> 16) & 0xff;
img.data[pos + 1] = (tmp >> 8) & 0xff;
img.data[pos + 2] = tmp & 0xff;
img.data[pos + 3] = 0xff;
pos+= 4;
}
if (pos >= 4 * w * h) {
ctx.putImageData(img, 0, 0);
$.post("${ctx}/common/webcam/uploadPhoto", {type: "data", image: canvas.toDataURL("image/png")}, function(msg){
console.log(msg);
pos = 0;
$("#img").attr("src", "${ctx}/"+msg);
});
}
};
} else {
saveCB = function(data) {
image.push(data);
pos+= 4 * w;
if (pos >= 4 * w * h) {
$.post("${ctx}/common/webcam/uploadPhoto", {type: "pixel", image: image.join('|')}, function(msg){
console.log(msg);
pos = 0;
$("#img").attr("src", "${ctx}/"+msg);
});
}
};
}
$("#webcam").webcam({
width: w,
height: h,
mode: "callback",
swffile: "${ctxStatic }/jquery-plugin/jscam_canvas_only.swf",
onSave: saveCB,
onCapture: function () {
webcam.save();
},
debug: function (type, string) {
console.log(type + ": " + string);
}
});
});
//拍照
function savePhoto(){
webcam.capture();
}
/*$(function () {
var image = new Array();
var w = 320, h = 240;
var pos = 0;
$("#webcam").webcam({
width: w,
height: h,
mode: "callback",
swffile: "${ctxStatic }/jquery-plugin/jscam_canvas_only.swf", // canvas only doesn't implement a jpeg encoder, so the file is much smaller
onTick: function (remain) {
if (0 == remain) {
jQuery("#status").text("Cheese!");
} else {
jQuery("#status").text(remain + " seconds remaining...");
}
},
onSave: function (data) {
// Work with the picture. Picture-data is encoded as an array of arrays... Not really nice, though =/
image.push(data);
pos += 4 * w;
if (pos == 4 * w * h) {
$.post("${ctx}/common/webcam/uploadPhoto", {w: w, h: h, image: image.join('|')}, function (msg) {
pos = 0;
image = new Array();
$("#img").attr("src", "${ctx}/"+msg);
});
}
},
onCapture: function () {
webcam.save();
// Show a flash for example
},
debug: function (type, string) {
// Write debug information to console.log() or a div, ...
},
onLoad: function () {
// Page load
var cams = webcam.getCameraList();
for (var i in cams) {
jQuery("#cams").append("<li>" + cams[i] + "</li>");
}
}
});
});*/
</script>
java后端代码：
/** * 功能描述：拍照并上传图片 * * @since 2016/5/24 */@RequestMapping(value = "/uploadPhoto")public void uploadPhoto(HttpServletRequest req, HttpServletResponse resp) throws BusinessException { String basePath = "upload/" + DateUtils.getDate("yyyyMMdd") + "/"; String filePath = req.getSession().getServletContext().getRealPath("/") + basePath; String fileName = DateUtils.getDate("yyyyMMddHHmmss") + ".png"; //默认传入的参数带类型等参数：data:image/png;base64, String imgStr = req.getParameter("image"); if (null != imgStr) { imgStr = imgStr.substring(imgStr.indexOf(",") + 1); } Boolean flag = GenerateImage(imgStr, filePath, fileName); String result = ""; if (flag) { result = basePath + fileName; } this.writeJson(result, resp);}/** * 功能描述：base64字符串转换成图片 * * @since 2016/5/24 */public boolean GenerateImage(String imgStr, String filePath, String fileName) { try { if (imgStr == null) { return false; } BASE64Decoder decoder = new BASE64Decoder(); //Base64解码 byte[] b = decoder.decodeBuffer(imgStr); //如果目录不存在，则创建 File file = new File(filePath); if (!file.exists()) { file.mkdirs(); } //生成图片 OutputStream out = new FileOutputStream(filePath + fileName); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { logger.error("生成图片异常：{}", e.getMessage()); return false; }}
参考文章：
http://blog.csdn.net/hfhwfw/article/details/5544408
http://www.xarg.org/project/jquery-webcam-plugin/ （js插件下载地址）
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