JspUpload JSP文件上传下载助手 完整版 Beta V1.0 附源码

package org.whvcse.upload; import java.io.BufferedOutputStream; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.Vector; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; import org.whvcse.upload.extend.Toolkit; import org.whvcse.upload.impl.Upload; /** * 文 件 名 : jsp文件上传下载<br> * * @author 孟德军 CopyRright (c) 2009: <a href='mak0000@msn.com'>mak0000</a> <br> * 文件编号： 20090526<br> * @version 1.0 <br> * 日 期： 2009.05.26 <br> * */ public class JspUpload implements Upload { private static final long serialVersionUID = 1L; private HttpServletRequest request = null; private BufferedWriter writer = null; /** * @see #fileSize 允许上传的文件大小 */ private long fileSize = 1024; /** * @see #fileName 文件名字 */ private String fileName = null; /** * @see #bufferSize 设置缓冲区的大小 */ private int bufferSize = 128; /** * @see #savePath 文件保存的路径 */ private String savePath = null; private int t = -1; /** * @see #check 文件约束 */ private String[] check = null; /** * @see #encoding 文件编码 */ private String encoding = "utf-8"; /** * @see #showErrorMessage 是否显示错误信息 */ private boolean showErrorMessage = true; private byte[] buffer = null; private String seperator = null; private boolean userDefineName = false; private String extendname; private Vector ErrorMessage = null; private long length = 0; private boolean isShowLog = false; public JspUpload() { } public JspUpload(String savepath) { this.savePath = savepath; } public JspUpload(HttpServletRequest request) { this.request = request; } public JspUpload(HttpServletRequest request, String path) { this.request = request; this.savePath = path; } public boolean isShowLog() { return isShowLog; } public void setShowLog(boolean isShowLog) { this.isShowLog = isShowLog; try { if (this.isShowLog) { writer = new BufferedWriter(new OutputStreamWriter( new FileOutputStream(".//upload.log", true), System .getProperty("file.encoding"))); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } /** * @deprecated */ public boolean destory() throws Exception { if (writer != null) { writer.close(); } return true; } public boolean upLoad(HttpServletRequest request) throws Exception { boolean status = true; if (savePath == null) { errorMessage("未设置保存上传文件的路径!"); } /* * if (this.fileName == null) { this.fileName = setFileName(); } */ setRequest(request); status = execute(); return status; } private void errorMessage(String message) throws Exception { if (isShowLog) { server("Exception" + message); } if (showErrorMessage) { ErrorMessage = new Vector(); ErrorMessage.add(message); throw new Exception(message); } } public boolean upload() throws Exception { boolean status = true; /* * if (this.fileName == null) { this.fileName = setFileName(); } */ if (this.request == null) { errorMessage(this.request.toString() + "不能为空!"); return false; } else { status = execute(); } return status; } public String getFileName() { return fileName; } /** * 设置上传的文件名，若不设置此项，程序将自动分析文件获得文件名,建议设置<br> * eg: test.txt * * @param fileName * 文件名 */ public void setFileName(String fileName) { this.fileName = fileName; userDefineName = true; } public long getFileSize() { return fileSize; } /** * 设置文件允许上传文件大小,默认为1024 * * @param fileSize * 文件大小 */ public void setFileSize(long fileSize) { this.fileSize = fileSize * 1024; } public HttpServletRequest getRequest() { return request; } /** * * @param request * HttpServletRequest */ public void setRequest(HttpServletRequest request) { this.request = request; } public String getSavePath() { return savePath; } /** * 文件存储路径,必须设置此项. * * @param savePath * 文件存储路径,必须设置此项. */ public void setSavePath(String savePath) { this.savePath = savePath; } /** * * @return 返回约束数组. */ public String[] getCheck() { return check; } /** * 为上传文件添加约束,即不允许上传的文件类型<br> * eg:exe bmp * * @param s * 存放约束的字符串数组.若连续两次设置此项,将覆盖前一次设置.默认无. * @return 已有的约束的数目. */ public int addCheck(String[] s) { if (check == null) { check = s; } return check.length; } private boolean execute() throws Exception { FileOutputStream out = null; boolean status = true; try { buffer = new byte[bufferSize]; request.setCharacterEncoding(getEncoding()); // 获取流对象. ServletInputStream in = request.getInputStream(); // 获取一行标志. t = in.readLine(buffer, 0, buffer.length); if (t != -1) { seperator = new String(buffer, 0, t); seperator = seperator.substring(0, 28); t = -1; } // 扩展名.filename="f:\exercise\c++.cpp" do { t = in.readLine(buffer, 0, buffer.length); String s = new String(buffer, 0, t); int index = s.indexOf("filename=\""); if (index != -1) { s = s.substring(index + 10); // s=f:\exercise\c++.cpp" index = s.indexOf("\""); s = s.substring(0, index); String temp = s; if (!userDefineName) { this.fileName = Toolkit.parse(temp, true); // setFileName(Toolkit.parse(temp, false)); } // s=f:\exercise\c++.cpp index = s.lastIndexOf("."); extendname = s.substring(index); if (check != null) { for (int i = 0; i < check.length; i++) { if (extendname.equals("." + check[i])) { errorMessage("上传的文件不符合规范，请重新上传!"); break; } } } /* * if (!userDefineName) { this.fileName = this.fileName + * s.substring(index); // s=.cpp } */ t = -1; } } while (t != -1); int point = this.fileName.lastIndexOf("."); if (point != -1) { // 读取文件内容. out = new FileOutputStream(this.savePath + "\\" + this.fileName); } else { out = new FileOutputStream(this.savePath + "\\" + this.fileName + extendname); } t = in.readLine(buffer, 0, buffer.length); String s = new String(buffer, 0, t); int i = s.indexOf("Content-Type:"); if (i == -1) { errorMessage("上传的不是文件"); status = false; return status; } else { // 去掉一个空行. in.readLine(buffer, 0, buffer.length); t = -1; } long trancsize = 0; t = in.readLine(buffer, 0, buffer.length); while (t != -1) { s = new String(buffer, 0, t); if (s.length() > 28) { s = s.substring(0, 28); if (s.equals(seperator)) { break; } } if (fileSize != -1) { if (trancsize >= (getFileSize())) { File f = new File(this.savePath + "\\" + this.fileName + extendname); f.delete(); errorMessage("上传文件过大！"); } } out.write(buffer, 0, t); trancsize += t; t = in.readLine(buffer, 0, buffer.length); } length = trancsize; } catch (Exception e) { status = false; File f = new File(this.savePath + "\\" + this.fileName + extendname); f.delete();