java文件上传-图片上传
java文件上传-图片上传
java使用springmvc实现图片上传
注意事项：
必需要有commons-fileupload，commons-io，这些jar包
springmvc的配置文件中必须要有
否则会报异常：org.apache.catalina.connector.RequestFacade cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest。
html代码如下：
java代码如下：
@RequestMapping(value="/imgUpload",method=RequestMethod.POST)
@ResponseBody
public String imgUpload(HttpServletRequest request, HttpServletResponse response)throws IOException{
MultipartHttpServletRequest multiPartRequest = (MultipartHttpServletRequest)request;
MultipartFile multiPartFile = multiPartRequest.getFile("upload");
String name = multiPartFile.getName();//返回表单里面上传图片参数的名字,eg:upload
String originalName = multiPartFile.getOriginalFilename();//返回客户端文件的原始名称，eg:atv1.png
String contentType = multiPartFile.getContentType();//文件内容类型，eg:image/png
long size = multiPartFile.getSize();//返回文件大小，单位是字节
byte[] bytes = multiPartFile.getBytes();//返回文件内容的字节数组
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
String callback = request.getParameter("CKEditorFuncNum");
//对文件类型进行判断筛选,只处理.jpg,.png,.gif的图片
boolean isSpecifiedImgType = false;
String imgFileSuffix = "";//图像文件的后缀
String[] imgSuffixs = {".jpg", ".png", ".gif"};
for(String imgSuffix : imgSuffixs){
if(originalName.endsWith(imgSuffix)){
isSpecifiedImgType = true;
imgFileSuffix = imgSuffix;
break;
}
}
if(!isSpecifiedImgType){
out.println("
out.println("window.parent.CKEDITOR.tools.callFunction(" + callback
+ ",''," + "'文件格式不正确(必须为.jpg/.png/.gif文件)');");
out.println("");
return null;
}
//对文件大小进行判断筛选
if(size > 600*1024){
out.println("
out.println("window.parent.CKEDITOR.tools.callFunction(" + callback
+ ",''," + "'文件大小不得大于600k');");
out.println("");
return null;
}
//文件的前缀，eg:201503271453000025
String imgFilePrefix = new SimpleDateFormat("yyyyMMddHHmmssssss").format(Calendar.getInstance().getTime());
String newImgFileName = imgFilePrefix + imgFileSuffix;
String uploadPathStr = getUploadPath();
File uploadPath = new File(uploadPathStr);
if(!uploadPath.exists()){
uploadPath.mkdirs();
}
InputStream in = multiPartFile.getInputStream();//返回一个输入流来读取文件内容
File targetFile = new File(uploadPathStr, newImgFileName);
OutputStream os = new FileOutputStream(targetFile);
byte[] buffer = new byte[1024];
int length = 0;
while((length=in.read(buffer))>0){
os.write(buffer, 0, length);
}
in.close();
os.close();
//String imgAdressOnServer = uploadPathStr + originalName;
//这个值在预览里面相当于图片的src
String imgAdressOnServer = getDomainPath(newImgFileName);
logger.info("专题定制上传图片的域名访问路径为：" + imgAdressOnServer);
out.println("
out.println("window.parent.CKEDITOR.tools.callFunction(" + callback
+ ",'" + imgAdressOnServer + "','')");
out.println("");
return null;
}
使用org.apache.commons.io.FileUtils这个类可以很方便的快速复制文件，使用示例如下：
@Controller
@RequestMapping("/courses")
public class CourseController {
@RequestMapping(value="/doUpload", method=RequestMethod.POST)
public String doUploadFile(@RequestParam("file") MultipartFile file) throws IOException{
if(!file.isEmpty()){
FileUtils.copyInputStreamToFile(file.getInputStream(), new File("c:\\temp\\", System.currentTimeMillis()+ file.getOriginalFilename()));
}
return "success";
}
@RequestMapping(value="/doUpload2", method=RequestMethod.POST)
public String doUploadFile2(MultipartHttpServletRequest multiRequest) throws IOException{
Iterator filesNames = multiRequest.getFileNames();
while(filesNames.hasNext()){
String fileName =filesNames.next();
MultipartFile file = multiRequest.getFile(fileName);
if(!file.isEmpty()){
FileUtils.copyInputStreamToFile(file.getInputStream(), new File("c:\\temp\\", System.currentTimeMillis()+ file.getOriginalFilename()));
}
}
return "success";
}
}
