222 lines
8.7 KiB
Java
222 lines
8.7 KiB
Java
package cn.keking.utils;
|
||
|
||
import cn.keking.config.ConfigConstants;
|
||
import cn.keking.model.FileAttribute;
|
||
import cn.keking.model.ReturnResponse;
|
||
import org.slf4j.Logger;
|
||
import org.slf4j.LoggerFactory;
|
||
import org.springframework.beans.factory.annotation.Autowired;
|
||
import org.springframework.stereotype.Component;
|
||
import java.io.*;
|
||
import java.net.*;
|
||
import java.util.UUID;
|
||
|
||
/**
|
||
* @author yudian-it
|
||
*/
|
||
@Component
|
||
public class DownloadUtils {
|
||
|
||
private static final Logger LOGGER = LoggerFactory.getLogger(DownloadUtils.class);
|
||
|
||
private String fileDir = ConfigConstants.getFileDir();
|
||
|
||
@Autowired
|
||
private FileUtils fileUtils;
|
||
|
||
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";
|
||
|
||
/**
|
||
* 一开始测试的时候发现有些文件没有下载下来，而有些可以；当时也是郁闷了好一阵，但是最终还是不得解
|
||
* 再次测试的时候，通过前台对比url发现，原来参数中有+号特殊字符存在，但是到后之后却变成了空格，突然恍然大悟
|
||
* 应该是转义出了问题，url转义中会把+号当成空格来计算，所以才会出现这种情况，遂想要通过整体替换空格为加号，因为url
|
||
* 中的参数部分是不会出现空格的，但是文件名中就不好确定了，所以只对url参数部分做替换
|
||
* 注: 针对URLEncoder.encode(s,charset)会将空格转成+的情况需要做下面的替换工作
|
||
* @param fileAttribute
|
||
* @return
|
||
*/
|
||
public ReturnResponse<String> downLoad(FileAttribute fileAttribute, String fileName) {
|
||
String urlAddress = fileAttribute.getDecodedUrl();
|
||
String type = fileAttribute.getSuffix();
|
||
ReturnResponse<String> response = new ReturnResponse<>(0, "下载成功!!!", "");
|
||
URL url = null;
|
||
try {
|
||
urlAddress = replacePlusMark(urlAddress);
|
||
urlAddress = encodeUrlParam(urlAddress);
|
||
// 因为tomcat不能处理'+'号，所以讲'+'号替换成'%20%'
|
||
urlAddress = urlAddress.replaceAll("\\+", "%20");
|
||
url = new URL(urlAddress);
|
||
} catch (MalformedURLException e) {
|
||
e.printStackTrace();
|
||
}
|
||
UUID uuid = UUID.randomUUID();
|
||
if (null == fileName) {
|
||
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);
|
||
}
|
||
String realPath = fileDir + fileName;
|
||
File dirFile = new File(fileDir);
|
||
if (!dirFile.exists()) {
|
||
dirFile.mkdirs();
|
||
}
|
||
try {
|
||
if ("ftp".equals(url.getProtocol())) {
|
||
String ftpUsername = fileUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_USERNAME);
|
||
String ftpPassword = fileUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_PASSWORD);
|
||
String ftpControlEncoding = fileUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_CONTROL_ENCODING);
|
||
FtpUtils.download(fileAttribute.getUrl(), realPath, ftpUsername, ftpPassword, ftpControlEncoding);
|
||
} else {
|
||
URLConnection connection = url.openConnection();
|
||
InputStream in = connection.getInputStream();
|
||
|
||
FileOutputStream os = new FileOutputStream(realPath);
|
||
byte[] buffer = new byte[4 * 1024];
|
||
int read;
|
||
while ((read = in.read(buffer)) > 0) {
|
||
os.write(buffer, 0, read);
|
||
}
|
||
os.close();
|
||
in.close();
|
||
}
|
||
response.setContent(realPath);
|
||
// 同样针对类txt文件，如果成功msg包含的是转换后的文件名
|
||
response.setMsg(fileName);
|
||
|
||
// txt转换文件编码为utf8
|
||
if("txt".equals(type)){
|
||
convertTextPlainFileCharsetToUtf8(realPath);
|
||
}
|
||
return response;
|
||
} catch (IOException e) {
|
||
LOGGER.error("文件下载失败", 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;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 注:可能是原来因为前端通过encodeURI来编码的，因为通过encodeURI编码+会被转成+号(亦即没有转)，
|
||
* 而通过encodeURIComponent则会转成%2B，这样URLDecoder是可以正确处理的，所以也就没有必要在这里替换了
|
||
* 转换url参数部分的空格为加号(因为在url编解码的过程中出现+转为空格的情况)
|
||
* @param urlAddress
|
||
* @return
|
||
*/
|
||
private String replacePlusMark(String urlAddress) {
|
||
if (urlAddress.contains("?")) {
|
||
String nonParamStr = urlAddress.substring(0,urlAddress.indexOf("?") + 1);
|
||
String paramStr = urlAddress.substring(nonParamStr.length());
|
||
return nonParamStr + paramStr.replace(" ", "+");
|
||
}
|
||
return urlAddress;
|
||
}
|
||
|
||
/**
|
||
* 对最有一个路径进行转码
|
||
* @param urlAddress
|
||
* http://192.168.2.111:8013/demo/Handle中文.zip
|
||
* http://192.168.2.111:8013/download?id=1&filename=中文.zip
|
||
* @return
|
||
*/
|
||
|
||
private String encodeUrlParam(String urlAddress){
|
||
StringBuffer sb = new StringBuffer();
|
||
for (int i = 0; i < urlAddress.length(); i++) {
|
||
char c = urlAddress.charAt(i);
|
||
if (c >= 0 && c <= 255) {
|
||
sb.append(c);
|
||
} else {
|
||
byte[] b;
|
||
try {
|
||
//指定需要的编码类型
|
||
b = String.valueOf(c).getBytes("utf-8");
|
||
} catch (Exception ex) {
|
||
System.out.println(ex);
|
||
b = new byte[0];
|
||
}
|
||
for (int j = 0; j < b.length; j++) {
|
||
int k = b[j];
|
||
if (k < 0) {
|
||
k += 256;
|
||
}
|
||
sb.append("%" + Integer.toHexString(k).toUpperCase());
|
||
}
|
||
}
|
||
}
|
||
return sb.toString();
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* 因为jodConvert2.1不支持ms2013版本的office转换，这里偷懒，尝试看改一下文件类型，让jodConvert2.1去
|
||
* 处理ms2013，看结果如何，如果问题很大的话只能采取其他方式，如果没有问题，暂时使用该版本来转换
|
||
* @param type
|
||
* @return
|
||
*/
|
||
private String dealWithMS2013(String type) {
|
||
String newType = null;
|
||
switch (type){
|
||
case "docx":
|
||
newType = "doc";
|
||
break;
|
||
case "xlsx":
|
||
newType = "doc";
|
||
break;
|
||
case "pptx":
|
||
newType = "ppt";
|
||
break;
|
||
default:
|
||
newType = type;
|
||
break;
|
||
}
|
||
return newType;
|
||
}
|
||
|
||
/**
|
||
* 转换文本文件编码为utf8
|
||
* 探测源文件编码,探测到编码切不为utf8则进行转码
|
||
* @param filePath 文件路径
|
||
*/
|
||
private static void convertTextPlainFileCharsetToUtf8(String filePath) throws IOException {
|
||
File sourceFile = new File(filePath);
|
||
if(sourceFile.exists() && sourceFile.isFile() && sourceFile.canRead()) {
|
||
String encoding = null;
|
||
try {
|
||
FileCharsetDetector.Observer observer = FileCharsetDetector.guessFileEncoding(sourceFile);
|
||
// 为准确探测到编码,不适用猜测的编码
|
||
encoding = observer.isFound()?observer.getEncoding():null;
|
||
// 为准确探测到编码,可以考虑使用GBK 大部分文件都是windows系统产生的
|
||
} catch (IOException e) {
|
||
// 编码探测失败,
|
||
e.printStackTrace();
|
||
}
|
||
if(encoding != null && !"UTF-8".equals(encoding)){
|
||
// 不为utf8,进行转码
|
||
File tmpUtf8File = new File(filePath+".utf8");
|
||
Writer writer = new OutputStreamWriter(new FileOutputStream(tmpUtf8File),"UTF-8");
|
||
Reader reader = new BufferedReader(new InputStreamReader(new FileInputStream(sourceFile),encoding));
|
||
char[] buf = new char[1024];
|
||
int read;
|
||
while ((read = reader.read(buf)) > 0){
|
||
writer.write(buf, 0, read);
|
||
}
|
||
reader.close();
|
||
writer.close();
|
||
// 删除源文件
|
||
sourceFile.delete();
|
||
// 重命名
|
||
tmpUtf8File.renameTo(sourceFile);
|
||
}
|
||
}
|
||
}
|
||
}
|