关于jquery html5 canvas 的问题

allin1987 2014-07-16 05:22:22

公司改别人项目，现在有这样一段代码

<canvas id="canvas" class="canvas_wrap" width="320" height="300"></canvas>

		<a href="#wrap" id="sign_ok_btn" class="checkbox radius btn2" style="width: 80%;">确认</a>

$('#sign_ok_btn').click(	

				function( event ){

					event.preventDefault();

					

					var dataURL = document.getElementById('canvas').toDataURL();

					$data = {

						'sign_img' : dataURL,

						'user_id' : $('input[name=user_id]').val(),

						'insured_reqdt' : $('input[name=insured_reqdt]').val(),

						'insured_corp' : $('input[name=insured_corp]').val(),

						'insured_order' : $('input[name=insured_order]').val()

						//'mst_no' : $('input[name=mst_no]').val()

					};

					$.ajax({

						type: 'post',

						url : '/mobile/proc/sign_proc.jsp',

						data : $data,

						cache: false,

						datatype: 'json',

						success:  _ajax._signInsert,

						error: function(request, status, error){

							

							alert('code : ' + request.status + '\r\nmessage : ' + request.responseText);

							_aspara._loadingDel();

						},

						beforeSend: function(){

							

							_aspara._loadingImg();

						},

						complete: function(){

							

							_aspara._loadingDel();

						}

					});

					return false;

					

				}

			);

sign_proc.jsp

Connection conn	= DB_Connection();

	conn.setAutoCommit(false);

	CallableStatement callStmt = null;



	String func		= request.getParameter("func");

	String user_id		= request.getParameter("user_id");

	//tring mst_no		= request.getParameter("mst_no");

	String insured_reqdt= request.getParameter("insured_reqdt");

	String insured_corp	= request.getParameter("insured_corp");

	String insured_order= request.getParameter("insured_order");

	String sign_img = request.getParameter("sign_img");

	String fileYn = "";

	String uploadYn = "";

	String return_flag = "";



	if(sign_img != null){

		try{

			callStmt = conn.prepareCall("{CALL PKG_PHONE_INSURED.SIGN_UPD(?,?,?,?)}");

			callStmt.setString(1, insured_corp);

			callStmt.setString(2, insured_reqdt);

			callStmt.setString(3, insured_order);

			callStmt.setString(4, sign_img);//callStmt.setString(4, sign_img.replace("data:image/png;base64,", ""));

			callStmt.executeUpdate();

			

			uploadYn = "Y";

			

			conn.commit();

			callStmt.close();

			conn.close();

		}catch(Exception e){

			uploadYn = "N";

		}

	}else{

		uploadYn = "N";

	}

	if("Y".equals(uploadYn)){

		return_flag = "3";

	}else{

		return_flag = "4";

	}



	StringBuffer sb = new StringBuffer();

	sb.append("[");

	sb.append("	{");

	sb.append("\"status\" : true,");

	sb.append("\"user_id\" : \""+user_id+"\",");

	//sb.append("\"mst_no\" : \""+mst_no+"\",");

	sb.append("\"return_flag\" : \""+return_flag+"\"");

	sb.append("	}");

	sb.append("]");



	out.println(sb.toString());



	callStmt.close();

	DB_Disconnection(conn);