xheditor-文件上传-java-支持html5-application/octet-stream

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package reyo.sdk.utils.file;
 
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.lang.StringUtils;
 
public class UploadFileServlet extends HttpServlet {
 
    private static final long serialVersionUID = 1541334866883495283L;
 
    private static String baseDir = "/UploadFile/"; // 上传文件存储目录
 
    private static String fileExt = "jpg,jpeg,bmp,gif,png,txt";
 
    private static Long maxSize = 0l;
 
    private static String dirType = "1"; // 0:不建目录 1:按天存入目录 2:按月存入目录 3:按扩展名存目录
                                            // 建议使用按天存
 
    public void init() throws ServletException {
 
        baseDir = this.getInitParameter("baseDir"); // 获取web.xml中servlet的配置文件目录参数
 
        if (StringUtils.isEmpty(baseDir))
            baseDir = "/UploadFile/"; // 获取文件上传存储的相当路径
 
        String realBaseDir = this.getServletConfig().getServletContext().getRealPath(baseDir);
 
        File baseFile = new File(realBaseDir);
 
        if (!baseFile.exists()) {
 
            baseFile.mkdir();
 
        }
 
        fileExt = this.getInitParameter("fileExt"); // 获取文件类型参数
 
        if (StringUtils.isEmpty(fileExt))
            fileExt = "jpg,jpeg,gif,bmp,png,txt";
 
        String maxSize_str = this.getInitParameter("maxSize"); // 获取文件大小参数
 
        if (StringUtils.isNotEmpty(maxSize_str)) {
 
            maxSize = new Long(maxSize_str);
 
        } else {
 
            maxSize = Long.valueOf("5242880"); // 5M
 
        }
 
        dirType = this.getInitParameter("dirType"); // 获取文件目录类型参数
 
        if (StringUtils.isEmpty(dirType))
            dirType = "1";
 
        if (",0,1,2,3,".indexOf("," + dirType + ",") < 0)
            dirType = "1";
 
    }
 
    // 上传文件数据处理过程
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
        response.setContentType("text/html; charset=UTF-8");
 
        response.setHeader("Cache-Control", "no-cache");
 
        String err = "";
 
        String newFileName = "";
 
        if ("application/octet-stream".equals(request.getContentType())) { // HTML
                                                                            // 5
                                                                            // 上传
 
            try {
 
                String dispoString = request.getHeader("Content-Disposition");
 
                int iFindStart = dispoString.indexOf("name=\"") + 6;
 
                int iFindEnd = dispoString.indexOf("\"", iFindStart);
 
                iFindStart = dispoString.indexOf("filename=\"") + 10;
 
                iFindEnd = dispoString.indexOf("\"", iFindStart);
 
                String sFileName = dispoString.substring(iFindStart, iFindEnd);
 
                int i = request.getContentLength();
 
                byte buffer[] = new byte[i];
 
                int j = 0;
 
                while (j < i) { // 获取表单的上传文件
 
                    int k = request.getInputStream().read(buffer, j, i - j);
 
                    j += k;
 
                }
 
                if (buffer.length == 0) { // 文件是否为空
 
                    printInfo(response, "上传文件不能为空", "");
 
                    return;
 
                }
 
                if (maxSize > 0 && buffer.length > maxSize) { // 检查文件大小
 
                    printInfo(response, "上传文件的大小超出限制", "");
 
                    return;
 
                }
 
                String filepathString = getSaveFilePath(sFileName, response);
 
                if ("不允许上传此类型的文件".equals(filepathString))
                    return; // 检查文件类型
 
                OutputStream out = new BufferedOutputStream(new FileOutputStream(this.getServletConfig().getServletContext().getRealPath("") + filepathString, true));
 
                out.write(buffer);
 
                out.close();
 
                newFileName = request.getContextPath() + filepathString;
 
            } catch (Exception ex) {
 
                System.out.println(ex.getMessage());
 
                newFileName = "";
 
                err = "错误: " + ex.getMessage();
 
            }
 
        } else {
 
            DiskFileUpload upload = new DiskFileUpload();
 
            try {
 
                List<FileItem> items = upload.parseRequest(request);
 
                Map<String, Serializable> fields = new HashMap<String, Serializable>();
 
                Iterator<FileItem> iter = items.iterator();
 
                while (iter.hasNext()) {
 
                    FileItem item = (FileItem) iter.next();
 
                    if (item.isFormField())
 
                        fields.put(item.getFieldName(), item.getString());
 
                    else
 
                        fields.put(item.getFieldName(), item);
 
                }
 
                FileItem uploadFile = (FileItem) fields.get("filedata"); // 获取表单的上传文件
 
                String fileNameLong = uploadFile.getName(); // 获取文件上传路径名称
 
                if (uploadFile.getSize() == 0) { // 文件是否为空
 
                    printInfo(response, "上传文件不能为空", "");
 
                    return;
 
                }
 
                if (maxSize > 0 && uploadFile.getSize() > maxSize) { // 检查文件大小
 
                    printInfo(response, "上传文件的大小超出限制", "");
 
                    return;
 
                }
 
                String filepathString = getSaveFilePath(fileNameLong, response);
 
                if ("不允许上传此类型的文件".equals(filepathString))
                    return; // 检查文件类型
 
                File savefile = new File(this.getServletConfig().getServletContext().getRealPath("") + filepathString);
 
                uploadFile.write(savefile); // 存储上传文件
 
                newFileName = request.getContextPath() + filepathString;
 
            } catch (Exception ex) {
 
                System.out.println(ex.getMessage());
 
                newFileName = "";
 
                err = "错误: " + ex.getMessage();
 
            }
 
        }
 
        printInfo(response, err, newFileName);
 
    }
 
    public String getSaveFilePath(String sFileName, HttpServletResponse response) throws IOException {
 
        String extensionName = sFileName.substring(sFileName.lastIndexOf(".") + 1); // 获取文件扩展名
 
        if (("," + fileExt.toLowerCase() + ",").indexOf("," + extensionName.toLowerCase() + ",") < 0) { // 检查文件类型
 
            printInfo(response, "不允许上传此类型的文件", "");
 
            return "不允许上传此类型的文件";
 
        }
 
        String fileFolder = ""; // 0:不建目录, 1:按天存入目录, 2:按月存入目录,
                                // 3:按扩展名存目录.建议使用按天存。
 
        if (dirType.equalsIgnoreCase("1"))
            fileFolder = new SimpleDateFormat("yyyyMMdd").format(new Date());
 
        if (dirType.equalsIgnoreCase("2"))
            fileFolder = new SimpleDateFormat("yyyyMM").format(new Date());
 
        if (dirType.equalsIgnoreCase("3"))
            fileFolder = extensionName.toLowerCase();
 
        String saveDirPath = baseDir + fileFolder + "/"; // 文件存储的相对路径
 
        String saveFilePath = this.getServletConfig().getServletContext().getRealPath("") + saveDirPath; // 文件存储在容器中的绝对路径
 
        File fileDir = new File(saveFilePath); // 构建文件目录以及目录文件
 
        if (!fileDir.exists()) {
 
            fileDir.mkdirs();
 
        }
 
        String filename = UUID.randomUUID().toString(); // 重命名文件
 
        return saveDirPath + filename + "." + extensionName;
 
    }
 
    // 使用I/O流输出 json格式的数据
 
    public void printInfo(HttpServletResponse response, String err, String newFileName) throws IOException {
 
        response.setContentType("text/plain");
 
        response.setCharacterEncoding("UTF-8");
 
        PrintWriter out = response.getWriter();
 
        out.println("{\"err\":\"" + err + "\",\"msg\":\"" + newFileName + "\"}");
 
        out.flush();
 
        out.close();
 
    }
 
}