DownloadUtils.java
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package cn.keking.utils;
import cn.keking.config.ConfigConstants;
import cn.keking.model.FileAttribute;
import cn.keking.model.ReturnResponse;
import cn.keking.service.FileInfoService;
import com.hotent.base.util.AppUtil;
import com.hotent.base.util.FileUtil;
import com.hotent.base.util.StringUtil;
import io.mola.galimatias.GalimatiasParseException;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import java.io.*;
import java.net.URL;
import java.util.UUID;
import static cn.keking.utils.KkFileUtils.isFtpUrl;
import static cn.keking.utils.KkFileUtils.isHttpUrl;
/**
* @author yudian-it
*/
public class DownloadUtils {
private final static Logger logger = LoggerFactory.getLogger(DownloadUtils.class);
private static final String fileDir = ConfigConstants.getFileDir();
private static final String URL_PARAM_FTP_USERNAME = "ftp.username";
private static final String URL_PARAM_FTP_PASSWORD = "ftp.password";
private static final String URL_PARAM_FTP_CONTROL_ENCODING = "ftp.control.encoding";
/**
* @param fileAttribute fileAttribute
* @param fileName 文件名
* @return 本地文件绝对路径
*/
public static ReturnResponse<String> downLoad(FileAttribute fileAttribute, String fileName) {
if(StringUtil.isEmpty(fileName)){
fileName = fileAttribute.getName();
}
String urlStr = fileAttribute.getUrl();
ReturnResponse<String> response = new ReturnResponse<>(0, "下载成功!!!", "");
String realPath = DownloadUtils.getRelFilePath(fileName, fileAttribute);
try {
if(StringUtils.hasText(fileAttribute.getFileId())){
if(!FileUtil.isExistFile(realPath)){
FileInfoService fileInfoService = AppUtil.getBean(FileInfoService.class);
byte[] fileBytes = fileInfoService.getFileBytesById(fileAttribute.getFileId());
File realFile = new File(realPath);
InputStream inputStream = new ByteArrayInputStream(fileBytes);
FileUtils.copyInputStreamToFile(inputStream,realFile);
}
}else{
URL url = WebUtils.normalizedURL(urlStr);
if (isHttpUrl(url)) {
File realFile = new File(realPath);
FileUtils.copyURLToFile(url,realFile);
} else if (isFtpUrl(url)) {
String ftpUsername = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_USERNAME);
String ftpPassword = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_PASSWORD);
String ftpControlEncoding = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_CONTROL_ENCODING);
FtpUtils.download(fileAttribute.getUrl(), realPath, ftpUsername, ftpPassword, ftpControlEncoding);
} else{
response.setCode(1);
response.setMsg("url不能识别url" + urlStr);
}
}
response.setContent(realPath);
response.setMsg(fileName);
return response;
} catch (IOException | GalimatiasParseException e) {
logger.error("文件下载失败，url：{}", urlStr, e);
response.setCode(1);
response.setContent(null);
if (e instanceof FileNotFoundException) {
response.setMsg("文件不存在!!!");
} else {
response.setMsg(e.getMessage());
}
return response;
}
}
/**
* 获取真实文件绝对路径
*
* @param fileName 文件名
* @return 文件路径
*/
private static String getRelFilePath(String fileName, FileAttribute fileAttribute) {
String type = fileAttribute.getSuffix();
if (null == fileName) {
UUID uuid = UUID.randomUUID();
fileName = uuid + "." + type;
} else { // 文件后缀不一致时，以type为准(针对simText【将类txt文件转为txt】)
fileName = fileName.replace(fileName.substring(fileName.lastIndexOf(".") + 1), type);
}
// 如果是通过附件id的方式 ，文件夹名称使用附件id作为文件夹
if(StringUtil.isNotEmpty(fileAttribute.getFileId())){
fileName = fileAttribute.getFileId() + "." + type;
}
String realPath = fileDir + fileName;
File dirFile = new File(fileDir);
if (!dirFile.exists() && !dirFile.mkdirs()) {
logger.error("创建目录【{}】失败,可能是权限不够，请检查", fileDir);
}
return realPath;
}
}