java 文件上传提示进度 java文件上传进度条 spring

1、实现org.apache.commons.fileupload.ProgressListener接口

import javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.ProgressListener;
import org.springframework.stereotype.Component;

import com.chinalife.cip.web.multipart.model.Progress;

@Component
public class FileUploadProgressListener implements ProgressListener {
	private HttpSession session;

	public void setSession(HttpSession session){
		this.session=session;
		Progress status = new Progress();
		session.setAttribute("status", status);
	}

	/*
	 * pBytesRead 到目前为止读取文件的比特数 pContentLength 文件总大小 pItems 目前正在读取第几个文件
	 */
	public void update(long pBytesRead, long pContentLength, int pItems) {
		Progress status = (Progress) session.getAttribute("status");
		status.setpBytesRead(pBytesRead);
		status.setpContentLength(pContentLength);
		status.setpItems(pItems);
	}

}

　　

2、扩展org.springframework.web.multipart.commons.CommonsMultipartResolver类

      重写public MultipartParsingResult parseRequest(HttpServletRequest request) throws MultipartException方法

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import com.chinalife.cip.web.multipart.listener.FileUploadProgressListener;

public class CustomMultipartResolver extends CommonsMultipartResolver {
	@Autowired
	private FileUploadProgressListener progressListener;
	
	public void setFileUploadProgressListener(FileUploadProgressListener progressListener){
		this.progressListener=progressListener;
	}
	
	@Override
	@SuppressWarnings("unchecked")
	public MultipartParsingResult parseRequest(HttpServletRequest request)
			throws MultipartException {
		String encoding = determineEncoding(request);
		FileUpload fileUpload = prepareFileUpload(encoding);
		progressListener.setSession(request.getSession());
		fileUpload.setProgressListener(progressListener);
		try {
			List<FileItem> fileItems = ((ServletFileUpload) fileUpload).parseRequest(request);
			return parseFileItems(fileItems, encoding);
		}
		catch (FileUploadBase.SizeLimitExceededException ex) {
			throw new MaxUploadSizeExceededException(fileUpload.getSizeMax(), ex);
		}
		catch (FileUploadException ex) {
			throw new MultipartException("Could not parse multipart servlet request", ex);
		}
	}
}

　　

1. <bean id="multipartResolver" class="com.chinalife.cip.web.multipart.CustomMultipartResolver">  
2. <property name="maxUploadSize" value="50000000" />  
3. </bean>  

 

1. 文件上传controller编写
2. @RequestMapping(...)  
3. public String uploadFile(@RequestParam(value = "file") MultipartFile... files) throws IOException {  
4.     for (MultipartFile f : files) {  
5. > 0) {  
6. targetFile = new File("目标文件路径及文件名");  
7.             f.transferTo(targetFile);//写入目标文件  
8.         }  
9.     }  
10.     return "...";  
11. }

1. 　

 

文件进度controller编写

1. import java.util.Map;  
2.   
3. import org.springframework.stereotype.Controller;  
4. import org.springframework.web.bind.annotation.RequestMapping;  
5. import org.springframework.web.bind.annotation.RequestMethod;  
6. import org.springframework.web.bind.annotation.ResponseBody;  
7. import org.springframework.web.bind.annotation.SessionAttributes;  
8.   
9. import com.chinalife.cip.web.multipart.model.Progress;  
10.   
11. @Controller  
12. @SessionAttributes("status")  
13. public class ProgressController {  
14.   
15. value = "/upfile/progress", method = RequestMethod.POST )  
16.     @ResponseBody  
17. <String, Object> model) {  
18. status = (Progress) model.get("status");  
19. status==null){  
20.             return "{}";  
21.         }  
22.         return status.toString();  
23.     }  
24. }

 

1. import javax.servlet.http.HttpSession;  
2.   
3. import org.apache.commons.fileupload.ProgressListener;  
4. import org.springframework.stereotype.Component;  
5.   
6. import com.chinalife.cip.web.multipart.model.Progress;  
7.   
8. @Component  
9. public class FileUploadProgressListener implements ProgressListener {  
10.     private HttpSession session;  
11.   
12.     public void setSession(HttpSession session){  
13. this.session=session;  
14. status = new Progress();  
15.         session.setAttribute("status", status);  
16.     }  
17.   
18.     /*  
19.      * pBytesRead 到目前为止读取文件的比特数 pContentLength 文件总大小 pItems 目前正在读取第几个文件  
20.      */  
21.     public void update(long pBytesRead, long pContentLength, int pItems) {  
22. status = (Progress) session.getAttribute("status");  
23.         status.setpBytesRead(pBytesRead);  
24.         status.setpContentLength(pContentLength);  
25.         status.setpItems(pItems);  
26.     }  
27.   
28. }