一个带缩放及翻转功能的图片查看器Java源码示例

package com.jspsmart.upload; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Vector; import javax.servlet.ServletConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletInputStream; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; public class SmartUpload { protected byte[] m_binArray; protected HttpServletRequest m_request; protected HttpServletResponse m_response; protected ServletContext m_application; private int m_totalBytes = 0; private int m_currentIndex = 0; private int m_startData = 0; private int m_endData = 0; private String m_boundary = new String(); private long m_totalMaxFileSize = 0L; private long m_maxFileSize = 0L; private Vector m_deniedFilesList = new Vector(); private Vector m_allowedFilesList = new Vector(); private boolean m_denyPhysicalPath = false; private boolean m_forcePhysicalPath = false; private String m_contentDisposition = new String(); public static final int SAVE_AUTO = 0; public static final int SAVE_VIRTUAL = 1; public static final int SAVE_PHYSICAL = 2; private Files m_files = new Files(); private Request m_formRequest = new Request(); public final void init(ServletConfig servletconfig) throws ServletException { this.m_application = servletconfig.getServletContext(); } public void service(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse) throws ServletException, IOException { this.m_request = httpservletrequest; this.m_response = httpservletresponse; } public final void initialize(ServletConfig servletconfig, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse) throws ServletException { this.m_application = servletconfig.getServletContext(); this.m_request = httpservletrequest; this.m_response = httpservletresponse; } public final void initialize(PageContext pagecontext) throws ServletException { this.m_application = pagecontext.getServletContext(); this.m_request = ((HttpServletRequest)pagecontext.getRequest()); this.m_response = ((HttpServletResponse)pagecontext.getResponse()); } public final void initialize(ServletContext servletcontext, HttpSession httpsession, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, JspWriter jspwriter) throws ServletException { this.m_application = servletcontext; this.m_request = httpservletrequest; this.m_response = httpservletresponse; } public void upload() throws ServletException, IOException, SmartUploadException { int i = 0; boolean flag = false; long l = 0L; boolean flag1 = false; String s = new String(); String s2 = new String(); String s4 = new String(); String s5 = new String(); String s6 = new String(); String s7 = new String(); String s8 = new String(); String s9 = new String(); String s10 = new String(); boolean flag2 = false; this.m_totalBytes = this.m_request.getContentLength(); this.m_binArray = new byte[this.m_totalBytes]; int j; for (; i < this.m_totalBytes; i += j) { try { this.m_request.getInputStream(); j = this.m_request.getInputStream().read(this.m_binArray, i, this.m_totalBytes - i); } catch (Exception exception) { throw new SmartUploadException("Unable to upload."); } } for (; (!flag1) && (this.m_currentIndex < this.m_totalBytes); this.m_currentIndex += 1) { if (this.m_binArray[this.m_currentIndex] == 13) flag1 = true; else this.m_boundary += (char)this.m_binArray[this.m_currentIndex]; } if (this.m_currentIndex == 1) return; for (this.m_currentIndex += 1; this.m_currentIndex < this.m_totalBytes; this.m_currentIndex += 2) { String s1 = getDataHeader(); this.m_currentIndex += 2; boolean flag3 = s1.indexOf("filename") > 0; String s3 = getDataFieldValue(s1, "name"); if (flag3) { s6 = getDataFieldValue(s1, "filename"); s4 = getFileName(s6); s5 = getFileExt(s4); s7 = getContentType(s1); s8 = getContentDisp(s1); s9 = getTypeMIME(s7); s10 = getSubTypeMIME(s7); } getDataSection(); if ((flag3) && (s4.length() > 0)) { if (this.m_deniedFilesList.contains(s5)) throw new SecurityException("The extension of the file is denied to be uploaded (1015)."); if ((!this.m_allowedFilesList.isEmpty()) && (!this.m_allowedFilesList.contains(s5))) throw new SecurityException("The extension of the file is not allowed to be uploaded (1010)."); if ((this.m_maxFileSize > 0L) && (this.m_endData - this.m_startData + 1 > this.m_maxFileSize)) throw new SecurityException("Size exceeded for this file : " + s4 + " (1105)."); l += this.m_endData - this.m_startData + 1; if ((this.m_totalMaxFileSize > 0L) && (l > this.m_totalMaxFileSize)) throw new SecurityException("Total File Size exceeded (1110)."); } if (flag3) { File file = new File(); file.setParent(this); file.setFieldName(s3); file.setFileName(s4); file.setFileExt(s5); file.setFilePathName(s6); file.setIsMissing(s6.length() == 0); file.setContentType(s7); file.setContentDisp(s8); file.setTypeMIME(s9); file.setSubTypeMIME(s10); if (s7.indexOf("application/x-macbinary") > 0) this.m_startData += 128; file.setSize(this.m_endData - this.m_startData + 1); file.setStartData(this.m_startData); file.setEndData(this.m_endData); this.m_files.addFile(file); } else { String s11 = new String(this.m_binArray, this.m_startData, this.m_endData - this.m_startData + 1); this.m_formRequest.putParameter(s3, s11); } if ((char)this.m_binArray[(this.m_currentIndex + 1)] == '-') break; } } public int save(String s) throws ServletException, IOException, SmartUploadException { return save(s, 0); } public int save(String s, int i) throws ServletException, IOException, SmartUploadException { int j = 0; if (s == null) s = this.m_application.getRealPath("/"); if (s.indexOf("/") != -1) { if (s.charAt(s.length() - 1) != '/') s = s + "/"; } else if (s.charAt(s.length() - 1) != '\\') s = s + "\\"; for (int k = 0; k < this.m_files.getCount(); k++) { if (this.m_files.getFile(k).isMissing()) continue; this.m_files.getFile(k).saveAs(s + this.m_files.getFile(k).getFileName(), i); j++; } return j; } public int getSize() { return this.m_totalBytes; } public byte getBinaryData(int i) { byte byte0; try { byte0 = this.m_binArray[i]; } catch (Exception exception) { throw new ArrayIndexOutOfBoundsException("Index out of range (1005)."); } return byte0; } public Files getFiles() { return this.m_files; } public Request getRequest() { return this.m_formRequest; } public void downloadFile(String s) throws ServletException, IOException, SmartUploadException { downloadFile(s, null, null); } public void downloadFile(String s, St