首先需要在配置文件中添加配置:
<!--配置文件的视图解析器,用于文件上传,其中ID是固定的:multipartResolver-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding">
<value>UTF-8</value>
</property>
<property name="maxUploadSize">
<value>32505856</value><!--单位:byte 上传文件大小限制为31M,31*1024*1024 -->
</property>
<property name="maxInMemorySize">
<value>4096</value>
</property>
</bean>
前台代码:
<form id="userForm" method="post" enctype="multipart/form-data">
<div>
<label class="my_input_title">图片1:</label>
<input type="file" name="file" class="" id="" value="" placeholder="请选择图片1"/>
</div> <div>
<label class="my_input_title">图片2:</label>
<input type="file" name="file" class="" id="" value="" placeholder="请选择图片2"/>
</div>
</form>
后台压缩工具类代码:
public static void photoupload(xxx x, @RequestParam("file") CommonsMultipartFile files[],ResultJson rj){
/******************************图片上传start**********************************/
InputStream input = null;
ByteArrayOutputStream bos = null; // 获得项目的路径
//ServletContext sc = request.getSession().getServletContext(); // 上传的文件要保存到的路径
String path = ("E:/x/"+x.getxRealname()+"/"); File file = new File(path); if (!file.exists()) file.mkdirs(); for (int i = 0; i < files.length; i++) {
try {
if (!files[i].isEmpty()) {
// 获得原始文件名
String fileName = files[i].getOriginalFilename(); System.out.println(i+"原始文件名:" + fileName); bos = new ByteArrayOutputStream(); input = files[i].getInputStream(); Image image = ImageIO.read(input);
// 图片压缩
BufferedImage tag = new BufferedImage(239,127, BufferedImage.TYPE_INT_RGB); tag.getGraphics().drawImage(image.getScaledInstance(239,127,Image.SCALE_SMOOTH),0,0,null); if (files[i].getOriginalFilename().endsWith(".jpg")) {
ImageIO.write(tag, "jpg", bos);
} else if (files[i].getOriginalFilename().endsWith(".png")) {
ImageIO.write(tag, "png", bos);
} else {
rj.setMsg("上传图片格式错误");
rj.setObj("");
rj.setSuccess(false);
} byte[] bytes = bos.toByteArray(); // 新文件名
String newFileName = UUID.randomUUID() + fileName; FileOutputStream fos = new FileOutputStream(path + newFileName);
fos.write(bytes);
input.close();
fos.close(); System.out.println("上传图片到:" + path + newFileName);
if(i==0){
x.setXPath(path + newFileName);
}else{
x.setYPath(path + newFileName);
}
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/*******************************图片上传end**************************************/
}
逻辑如上,自己可修改相关参数实现,如上即可实现图片压缩上传!