UEditor文件上传辅助类

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadBase.InvalidContentTypeException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;



/**
 * UEditor文件上传辅助类
 * 
 */
public class Uploader {
    private static final Logger logger = LoggerFactory.getLogger(Uploader.class);

    // 输出文件地址
    private String url = "";
    // 上传文件名
    private String fileName = "";
    // 状态
    private String state = "";
    // 文件类型
    private String type = "";
    // 原始文件名
    private String originalName = "";
    // 文件大小
    private String size = "";

    private HttpServletRequest request = null;
    private String title = "";
    ApplicationContext application;

    // 保存路径
    @SuppressWarnings("unused")
    private String savePath = "upload";
    // 文件允许格式
    private String[] allowFiles = { ".rar", ".doc", ".docx", ".zip", ".pdf", ".txt", ".swf", ".wmv", ".gif", ".png",
            ".jpg", ".jpeg", ".bmp" };
    // 文件大小限制，单位KB
    private int maxSize = 10000;

    private HashMap<String, String> errorInfo = new HashMap<String, String>();

    public Uploader(HttpServletRequest request) {
        this.request = request;
        HashMap<String, String> tmp = this.errorInfo;
        tmp.put("SUCCESS", "SUCCESS"); // 默认成功
        tmp.put("NOFILE", "未包含文件上传域");
        tmp.put("TYPE", "不允许的文件格式");
        tmp.put("SIZE", "文件大小超出限制");
        tmp.put("ENTYPE", "请求类型ENTYPE错误");
        tmp.put("REQUEST", "上传请求异常");
        tmp.put("IO", "IO异常");
        tmp.put("DIR", "目录创建失败");
        tmp.put("UNKNOWN", "未知错误");
        application = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getServletContext());
    }

    public void upload() throws Exception {

        ConfigUtil util = (ConfigUtil) application.getBean("configUtil");
        boolean isMultipart = ServletFileUpload.isMultipartContent(this.request);
        if (!isMultipart) {
            this.state = this.errorInfo.get("NOFILE");
            return;
        }

        DiskFileItemFactory dff = new DiskFileItemFactory();
        String savePath = this.getFolder(util.getAbsUploadPath());
        dff.setRepository(new File(savePath));
        try {
            ServletFileUpload sfu = new ServletFileUpload(dff);
            sfu.setSizeMax(this.maxSize * 1024);
            sfu.setHeaderEncoding("utf-8");
            FileItemIterator fii = sfu.getItemIterator(this.request);
            while (fii.hasNext()) {
                FileItemStream fis = fii.next();
                if (!fis.isFormField()) {
                    this.originalName = fis.getName().substring(
                            fis.getName().lastIndexOf(System.getProperty("file.separator")) + 1);
                    if (!this.checkFileType(this.originalName)) {
                        this.state = this.errorInfo.get("TYPE");
                        continue;
                    }
                    this.fileName = this.getName(this.originalName);
                    this.type = this.getFileExt(this.fileName);
                    this.url = savePath + this.fileName;
                    BufferedInputStream in = new BufferedInputStream(fis.openStream());
                    FileOutputStream out = new FileOutputStream(new File(url));
                    BufferedOutputStream output = new BufferedOutputStream(out);
                    Streams.copy(in, output, true);

                    this.url = util.getResourceContext() + fileName;
                    this.state = this.errorInfo.get("SUCCESS");
                    // UE中只会处理单张上传，完成后即退出
                    break;
                } else {
                    String fname = fis.getFieldName();
                    // 只处理title，其余表单请自行处理
                    if (!fname.equals("pictitle")) {
                        continue;
                    }
                    BufferedInputStream in = new BufferedInputStream(fis.openStream());
                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                    StringBuffer result = new StringBuffer();
                    while (reader.ready()) {
                        result.append((char) reader.read());
                    }
                    this.title = new String(result.toString().getBytes(), "utf-8");
                    reader.close();

                }
            }
        } catch (SizeLimitExceededException e) {
            logger.error("SizeLimitExceededException",e);
            this.state = this.errorInfo.get("SIZE");
        } catch (InvalidContentTypeException e) {
            logger.error("InvalidContentTypeException",e);
            this.state = this.errorInfo.get("ENTYPE");
        } catch (FileUploadException e) {
            logger.error("FileUploadException",e);
            this.state = this.errorInfo.get("REQUEST");
        } catch (Exception e) {
            logger.error("Exception",e);
            this.state = this.errorInfo.get("UNKNOWN");
        }
    }

    /**
     * 接受并保存以base64格式上传的文件
     * 
     * @param fieldName
     */
    /*public void uploadBase64(String fieldName) {
        String savePath = this.getFolder(this.savePath);
        String base64Data = this.request.getParameter(fieldName);
        this.fileName = this.getName("test.png");
        this.url = savePath + this.fileName;
        //BASE64Decoder decoder = new BASE64Decoder();
        try {
            File outFile = new File(this.getPhysicalPath(this.url));
            OutputStream ro = new FileOutputStream(outFile);
            byte[] b = decoder.decodeBuffer(base64Data);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            ro.write(b);
            ro.flush();
            ro.close();
            this.state = this.errorInfo.get("SUCCESS");
        } catch (Exception e) {
            logger.error("Exception",e);
            this.state = this.errorInfo.get("IO");
        }
    }*/

    /**
     * 文件类型判断
     * 
     * @param fileName
     * @return
     */
    private boolean checkFileType(String fileName) {
        Iterator<String> type = Arrays.asList(this.allowFiles).iterator();
        while (type.hasNext()) {
            String ext = type.next();
            if (fileName.toLowerCase().endsWith(ext)) {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取文件扩展名
     * 
     * @return string
     */
    private String getFileExt(String fileName) {
        return fileName.substring(fileName.lastIndexOf("."));
    }

    /**
     * 依据原始文件名生成新文件名
     * 
     * @return
     */
    private String getName(String fileName) {
        Random random = new Random();
        return this.fileName = "" + random.nextInt(10000) + System.currentTimeMillis() + this.getFileExt(fileName);
    }

    /**
     * 根据字符串创建本地目录 并按照日期建立子目录返回
     * 
     * @param path
     * @return
     */
    private String getFolder(String path) {
        // 5SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd");

        File dir = new File(path);
        if (!dir.exists()) {
            try {
                boolean makeDirresult = dir.mkdirs();
                System.out.println("makeDirresult:" + makeDirresult);
            } catch (Exception e) {
                logger.error("Exception",e);
                this.state = this.errorInfo.get("DIR");
                return "";
            }
        }
        return path;
    }

    /**
     * 根据传入的虚拟路径获取物理路径
     * 
     * @param path
     * @return
     */
    @SuppressWarnings("unused")
    private String getPhysicalPath(String path) {
        String servletPath = this.request.getServletPath();
        String realPath = this.request.getSession().getServletContext().getRealPath(servletPath);
        return new File(realPath).getParent() + "/" + path;
    }

    public void setSavePath(String savePath) {
        this.savePath = savePath;
    }

    public void setAllowFiles(String[] allowFiles) {
        this.allowFiles = allowFiles;
    }

    public void setMaxSize(int size) {
        this.maxSize = size;
    }

    public String getSize() {
        return this.size;
    }

    public String getUrl() {
        return this.url;
    }

    public String getFileName() {
        return this.fileName;
    }

    public String getState() {
        return this.state;
    }

    public String getTitle() {
        return this.title;
    }

    public String getType() {
        return this.type;
    }

    public String getOriginalName() {
        return this.originalName;
    }
}