java IO流读取图片供前台显示代码分享

/** 
   * IO流读取图片 by:long 
   * @return 
   */
@RequestMapping(value = "/IoReadImage/{imgName}", method = RequestMethod.GET) 
  public String IoReadImage(@PathVariable String imgName,HttpServletRequest request,HttpServletResponse response) throws IOException {
	ServletOutputStream out = null;
	FileInputStream ips = null;
	try {
		//获取图片存放路径 
		String imgPath = Constans.FOLDER_IMAGE + imgName;
		ips = new FileInputStream(new File(imgPath));
		response.setContentType("multipart/form-data");
		out = response.getOutputStream();
		//读取文件流 
		int len = 0;
		byte[] buffer = new byte[1024 * 10];
		while ((len = ips.read(buffer)) != -1){
			out.write(buffer,0,len);
		}
		out.flush();
	}
	catch (Exception e){
		e.printStackTrace();
	}
	finally {
		out.close();
		ips.close();
	}
	return null;
}

<span style="white-space:pre;"> </span><div style="float: left;"> 
     <#--${model.userDatil.photo} 为数据库存放的文件名称--> 
     <img src="${ctx}/userInfo/IoReadImage/${model.userDatil.photo}" id="npcImg" width="125" height="148"/> 
     <input type="hidden" id="photo" name="photo"/> 
    </div> 

var npcName = $('#npcImg').data('val'); 
var img = document.getElementById("npcImg"); 
img.src = '/userInfo/IoReadImage/'+npcName; 

$('#npcImg').attr('src','/userInfo/IoReadImage/'+npcName);