接收multiparitFile 上传_org.springframework.web.multipart.multipartexcepti-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_29623951/article/details/51393780

本文介绍了一个使用Java实现的文件上传方法，涵盖了从处理MultipartFile到完成文件存储的全过程，并确保了目录创建及文件覆盖等细节。

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import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;
import org.xml.sax.InputSource;

import com.mschn.elife.basics.bean.UserInfo;
import com.mschn.elife.common.exception.UnauthenticationException;

//上传

   public static String uploadFile(MultipartFile formFile) throws FileNotFoundException,
           IOException {
       Properties p = Utils.getProp();
       // 如果目录不存在，创建目录
       String s =    p.getProperty(FIRL_ADDRESS);
       String s1 = s.replace("\\", "/");
       new File(s).mkdirs();

       final File uploadFile = new File(s, formFile.getOriginalFilename());

       // 如果文件已存在，将旧文件删除
       uploadFile.delete();

       final OutputStream outputStream = new FileOutputStream(uploadFile);
       BufferedInputStream bufferedInputStream = null;
       BufferedOutputStream bufferedOutputStream = null;
       try {
           bufferedInputStream = new BufferedInputStream(
                   formFile.getInputStream());
           bufferedOutputStream = new BufferedOutputStream(outputStream);

           final byte temp[] = new byte[(int) formFile.getSize()];
           int readBytes = 0;
           while ((readBytes = bufferedInputStream.read(temp)) != -1) {
               bufferedOutputStream.write(temp, 0, readBytes);
           }
           bufferedOutputStream.flush();

       } finally {
           if (bufferedOutputStream != null) {
               bufferedOutputStream.close();
           }
           if (bufferedInputStream != null) {
               bufferedInputStream.close();
           }
       }

       return s1+"/"+formFile.getOriginalFilename();

   }