JAVA 工具类文件工具类

朱雀 2023-02-21 06:24 207阅读 0赞

package com.thinkgem.jeesite.modules.meeting.utils;
 
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.multipart.MultipartFile;
 
 import com.thinkgem.jeesite.common.config.Global;
 import com.thinkgem.jeesite.common.utils.Exceptions;
 
 /** * * Title: FileUtil * Description: 文件工具类 * Company: * @Package com.meeting.attachment.utils * @author chenlf * @date 2020年1月14日 上午10:55:08 * @version lsmeeting-1.0 */
 public class FileUtil { 
 	
 	private static final Logger logger = LoggerFactory.getLogger(FileUtil.class);
 	
 	public static final String UPLOAD_PATH = Global.getConfig("uploadPath");
 	
 	/** * 是否上传了文件 * @param files * @return */
 	public static Boolean isUploadFile(MultipartFile[] files) { 
 		boolean isUpload = false;
 		for (MultipartFile file : files) { 
 			if (StringUtils.isNotBlank(file.getOriginalFilename())) { 
 				isUpload = true;
 				break;
 			}
 		}
 		return isUpload;
 	}
 	
 	/** * 保存附件 * @title saveFile * @Description 描述方法做什么用 * @param is 文件流 * @param savePath 保存路径（不包含根路径） * @return */
 	public static Boolean saveFile(InputStream is,String savePath)throws IOException{ 
 		OutputStream os = null;
 		try{ 
 			String rootPath = UPLOAD_PATH+File.separator+savePath.substring(0, savePath.lastIndexOf(File.separator)-1);
 			String fileName = savePath.substring(savePath.lastIndexOf(File.separator));
 			File saveDir = new File(rootPath);
 			if(!saveDir.exists()){ 
 				saveDir.mkdirs();//创建文件夹
 			}
 			os = new FileOutputStream(rootPath+File.separator+fileName);//奇怪为什么直接拼savePath路径不能写文件，报错找不到文件，为什么折开正常
 			byte[] b = new byte[100*1024]; 
 			int bytesRead = 0;
 			while ((bytesRead = is.read(b)) != -1) { 
 			 os.write(b, 0, bytesRead); 
 			}
 			return true;
 		}finally{ 
 			try{ 
 				os.close();
 				is.close();
 			}catch(Exception ex){ 
 				Exceptions.unchecked(ex);
 			}
 		}
 	}
 
 	/** * 上传单个文件 * @param multipartFile * @param uploadPath */
 	public static String upload(MultipartFile multipartFile, String uploadPath) { 
 		String originalFilename = multipartFile.getOriginalFilename();
 		logger.debug("开始上传文件：" + originalFilename);
 		String fileName = getSaveFileName(originalFilename);
 		File dir = new File(uploadPath);
 		File file = new File(uploadPath, fileName);
 		try { 
 			if (!dir.exists()) { 
 				dir.mkdirs();
 			}
 			if (!file.exists()) { 
 				file.createNewFile();
 			}
 			multipartFile.transferTo(file);
 			logger.debug(uploadPath + File.separator + originalFilename + "\t上传成功，保存为：" + fileName);
 			//返回相对路径
 			return transformRelativePath(UPLOAD_PATH, file.getPath());
 		} catch (IOException e) { 
 			logger.debug(originalFilename + "上传失败！");
 			e.printStackTrace();
 		}
 		return null;
 	}
 	
 	/** * * @title upload * @Description 多文件上传 * @author chenlf * @param multipartFiles * @param uploadPath */
 	public static void upload(MultipartFile[] multipartFiles, String uploadPath) { 
 		for(int i = 0; i < multipartFiles.length; i ++) { 
 			upload(multipartFiles[0], uploadPath);
 		}
 	}
 	
 	/** * * @title getFileUploadPath * @Description 附件上传 * @author chenlf * @param bsId * @return 类型/业务ID/时间 */
 	public static String getFileUploadPath(String bsId, String type){ 
 		String uploadPath = UPLOAD_PATH;
 		DateFormat format=new SimpleDateFormat("yyyyMMdd");
 		String date = format.format(new Date());
 		if (StringUtils.isNotBlank(bsId)) { 
 			uploadPath += File.separator + type +File.separator + bsId + File.separator + date;
 		} else { 
 			uploadPath += File.separator + type +File.separator + date;
 		}
 		logger.debug("上传路径：" + uploadPath);
 		return uploadPath;
 	}
 	
 	/** * 相对路径转绝对路径 * @title transformAbsolutePath * @Description 描述方法做什么用 * @param relativePath 相对路径 * @return */
 	public static String transformAbsolutePath(String relativePath){ 
 		if (StringUtils.isNotBlank(relativePath)) { 
 			//得到配置文件绝对路径
 			String absolutePath = UPLOAD_PATH+relativePath;
 			return absolutePath;
 		}
 		return "";
 	}
 	
 	/** * 根据配置路径和保存路径截取绝对路径 * @title transformRelativePath * @Description 描述方法做什么用 * @param propertiesPath 配置路径 * @param savePath 保存路径 * @return */
 	public static String transformRelativePath(String propertiesPath, String savePath){ 
 		if (StringUtils.isNotBlank(propertiesPath) && StringUtils.isNotBlank(savePath)) { 
 			//截取得到绝对路径
 			propertiesPath = new File(propertiesPath).getPath().replace("//", File.separator);
 			String relativePath = savePath.replace(propertiesPath, "");
 			return relativePath;
 		}
 		return "";
 	}
 	
 	/** * 拼接保存路径以及设置文件唯一名称 * @title getSaveFileName * @Description 描述方法做什么用 * @param fileName * @return */
 	private static String getSaveFileName(String fileName) { 
 		StringBuffer savaFileName = new StringBuffer();
 		savaFileName.append(System.currentTimeMillis());
 		savaFileName.append(fileName.substring(fileName.lastIndexOf(".")));
 		return savaFileName.toString();
 	}
 	
 	/** * 下附件以及预览 * @title downLoad * @Description 下附件以及预览 * @param response * @param fileName * @param filePath * @param fileType * @return */
 	public static void downLoad(HttpServletResponse response,String fileName, 
 			String filePath, FileType fileType) { 
 		filePath = transformAbsolutePath(filePath);
 		String contentType;
 		switch (fileType) { 
 			case jpg :
 			case png :
 			case jpeg :
 				contentType = "image/*";
 				break;
 			case doc :
 			case docx:
 				contentType = "application/msword";
 			default :
 				contentType = "multipart/form-data";
 				break;
 		}
 		InputStream inputStream = null;
 		OutputStream os = null;
 		try { 
 			response.setCharacterEncoding("utf-8");
 			if (!StringUtils.isNotBlank(contentType)) { 
 				response.setContentType(contentType);
 			}
 			response.setHeader("Content-Disposition", "attachment;fileName="
 					+ new String(fileName.getBytes("gbk"),"iso-8859-1"));
 			File file = new File(filePath);
 			//先判断文件是否存在
 			if (file.exists()) { 
 				File targetFile = new File(filePath);
 				inputStream = new FileInputStream(targetFile);
 				os = response.getOutputStream();
 				byte[] b = new byte[2048];
 				int length;
 				while ((length = inputStream.read(b)) > 0) { 
 					os.write(b, 0, length);
 				}
 			}
 		} catch (UnsupportedEncodingException e1) { 
 			e1.printStackTrace();
 		} catch (FileNotFoundException e) { 
 			e.printStackTrace();
 		} catch (IOException e) { 
 			e.printStackTrace();
 		} finally { 
 			try { 
 				if (os != null) { 
 					os.close();
 				}
 			} catch (IOException e) { 
 				e.printStackTrace();
 			}
 			try { 
 				if (inputStream != null) { 
 					inputStream.close();
 				}
 			} catch (IOException e) { 
 				e.printStackTrace();
 			}
 		}
 	}
 	
 	/** * 根据文件路径删除文件 * @title deleteFile * @Description 描述方法做什么用 * @param filePath 文件绝对路径 * @return */
 	public static boolean deleteFile(String filePath){ 
 		filePath = transformAbsolutePath(filePath);
 		File file = new File(filePath);
 // 如果文件路径所对应的文件存在，并且是一个文件，则直接删除
 if (file.exists() && file.isFile()) { 
 if (file.delete()) { 
 	logger.debug("删除文件" + filePath + "成功！");
 return true;
 } else { 
 	logger.debug("删除文件" + filePath + "失败！");
 return false;
 }
 } else { 
 	logger.debug("文件不存在！");
 return false;
 }
 	}
 	
 	/** * @title readByte * @Description 读取文件(拿到相对路径转绝对路径) * @param filePath * @return */
 	public static byte[] readByte(String filePath) { 
 		filePath = transformAbsolutePath(filePath);
 		return readByteFilePath(filePath);
 	}
 	
 	/** * @title readBytes * @Description 根据路径读取文件 * @param filePath * @return */
 	public static byte[] readByteFilePath(String filePath) { 
 		FileInputStream fis;
 		try { 
 			fis = new FileInputStream(filePath);
 			try { 
 				byte r[] = new byte[fis.available()];
 				fis.read(r);
 				return r;
 			} catch (IOException e) { 
 				e.printStackTrace();
 			} finally { 
 				try { 
 					fis.close();
 				} catch (IOException e) { 
 					e.printStackTrace();
 				}
 			}
 		} catch (FileNotFoundException e) { 
 			logger.debug("文件不存在！");
 			e.printStackTrace();
 		}
 		return null;
 	}
 	
 	/** * @title getSystemAccessPath * @Description 获取系统访问路径（协议名://IP地址:端口号/系统名） * @param request */
 	public static String getSystemAccessPath(HttpServletRequest request) { 
 		return request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath();
 	}
 	
 }

package com.thinkgem.jeesite.modules.meeting.utils;
 
 /** * * Title: FileType * Description: 文件类型 * Company: * @Package com.meeting.attachment.utils * @author chenlf * @date 2020年1月14日 上午10:41:50 * @version lsmeeting-1.0 */
 public enum FileType { 
 	doc,
 	docx,
 	xls,
 	xlsx,
 	pdf,
 	jpg,
 	png,
 	jpeg,
 	other;//其他
 	
 	@Override
 	public String toString() { 
 		return this.name();
 	}
 
 	public static FileType create(String value) { 
 		try { 
 			return FileType.valueOf(value);
 		} catch (Exception e) { 
 			return FileType.other;
 		}
 	}
 	
 }