servlet远程文件上传

来源：互联网发布：禁用独立显卡 linux 编辑：程序博客网时间：2024/05/18 21:44

设置表单的提交方式为 "post",并且，还要设置 "enctype=multipart/form-data"。

import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.alibaba.fastjson.JSON;

public class ReceiveFileSeverlet extends HttpServlet {

   public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException,
           IOException {

       // 解析参数
       String jsonStr = "";

//       String checkResult = checkKey("api_key_mobile", request.getParameter("key"));
//       if (!"".equals(checkResult)) {
//
//           response.setCharacterEncoding("UTF-8");
//           response.getWriter().print(checkResult);
//           return;
//       }

       Hashtable<String, String> formDatas = new Hashtable<String, String>();
       List<File> uploadFiles = new ArrayList<File>();
       try {
           String str1 = AppConfig.getInstance().getApplicationRoot() + File.separator + "upload" + File.separator;
           DiskFileItemFactory localDiskFileItemFactory = new DiskFileItemFactory();
           localDiskFileItemFactory.setRepository(new File(str1 + "tmp"));
           localDiskFileItemFactory.setSizeThreshold(4194304);
           ServletFileUpload localServletFileUpload = new ServletFileUpload(localDiskFileItemFactory);
           localServletFileUpload.setHeaderEncoding("UTF-8");
           List<FileItem> localList = localServletFileUpload.parseRequest(request);
           for (int i = 0; i < localList.size(); i++) {
               FileItem localFileItem = localList.get(i);
               if (!localFileItem.isFormField()) {
                   if ("".equals(localFileItem.getName())) {
                       continue;
                   }
//                   File localFile = new File(str1 + getNewFileName(localFileItem.getName()));
                   File localFile = new File(str1 + localFileItem.getName());
                   localFileItem.write(localFile);
                   String str2 = localFileItem.getName();
                   if ((str2.toLowerCase().endsWith(".jsp")) || (str2.toLowerCase().endsWith(".bat")) || (str2.toLowerCase().endsWith(".exe"))) {
                       localFile.delete();
                   } else {
                       uploadFiles.add(localFile);
                   }
               } else {
                   formDatas.put(localFileItem.getFieldName(), localFileItem.getString("UTF-8").trim());
               }
           }
       } catch (Exception e) {
           AppLogger.getInstance().errorLog("上传文件出错", e);
       }

//        Iterator localIterator = request.getParameterMap().keySet().iterator();
//        while (localIterator.hasNext())
//        {
//          String str1 = localIterator.next().toString();
//          String str2 = request.getParameter(str1);
//          if (str2 == null) {
//              continue;
//          }
//          formDatas.put(str1, str2.trim());
//        }

       Connection con = null;
       try {
           con = DBConnectionPool.getInstance().getConnection();
           con.setAutoCommit(false);

           // 处理文件
           jsonStr = uploadFile(con, uploadFiles);

           con.commit();
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           if (con != null)
               try {
                   con.rollback();
                   con.close();
               } catch (Exception localException3) {
               }
       }

       response.setCharacterEncoding("UTF-8");
       response.getWriter().print(jsonStr);
   }

   private String uploadFile(Connection con, List<File> uploadFiles) throws Exception {
       Hashtable<String, String> jsonHash = new Hashtable<String, String>();
       File file = uploadFiles.get(0);
       String imageDir = Constants.UPLOAD_REAL_PATH + File.separator + "serviceReport" + File.separator;
       if (file.exists()) {
           file.renameTo(new File(imageDir + File.separator + file.getName()));
           jsonHash.put("status", "1"); // 成功
       }

       return JSON.toJSONString(jsonHash);
   }

   /**
   * 重新命名图片
   * @param paramString
   * @return
   * @throws Exception
   */
//   private String getNewFileName(String paramString) throws Exception {
//       int i = paramString.lastIndexOf('.');
//       String str = StringUtil.getRandomString(10);
//       return str + DateTimeUtil.getCurrentDateTime().replaceAll("-", "").replaceAll(":", "").replaceAll(" ", "") + paramString.substring(i);
//   }

//   private String checkKey(String configKey, String key) {
//       Hashtable<String, String> jsonHash = new Hashtable<String, String>();
//       // 判断来源是否合法
//       String tempKey = key;
//       if (!tempKey.equals(AppConfig.getInstance().getParameterConfig().getParameter(configKey))) {
//           jsonHash.put("result", "-1"); // 非法请求
//           jsonHash.put("data", "非法请求");
//           return JSON.toJSONString(jsonHash);
//       }
//       return "";
//   }
}

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