最近接触到一个需求要求压缩导出文件,于是乎便要致力于研究一下工具类啦,故也诞生了此篇文章。
下面代码中,溪源也将import
导入的依赖也贴出来了,避免大家引入错误。
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* @author wx
* @date 2020/10/29 5:19 下午
*/
public class FileZipUtil {
private static void handlerFile(ZipOutputStream zip, File file, String dir) throws Exception {
//如果当前的是文件夹,则进行进一步处理
if (file.isDirectory()) {
//得到文件列表信息
File[] fileArray = file.listFiles();
if (fileArray == null) {
return;
}
//将文件夹添加到下一级打包目录
zip.putNextEntry(new ZipEntry(dir "/"));
dir = dir.length() == 0 ? "" : dir "/";
//递归将文件夹中的文件打包
for (File f : fileArray) {
handlerFile(zip, f, dir f.getName());
}
} else {
//当前的是文件,打包处理
//文件输入流
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
ZipEntry entry = new ZipEntry(dir);
zip.putNextEntry(entry);
zip.write(FileUtils.readFileToByteArray(file));
IOUtils.closeQuietly(bis);
zip.flush();
zip.closeEntry();
}
}
private static byte[] createZip(String sourceFilePath) throws Exception{
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ZipOutputStream zip = new ZipOutputStream(outputStream);
//将目标文件打包成zip导出
File file = new File(sourceFilePath);
handlerFile(zip, file,"");
IOUtils.closeQuietly(zip);
return outputStream.toByteArray();
}
public static void exportZip(HttpServletResponse response, String sourceFilePath) {
//文件名以时间戳作为前缀
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String filePrefix = sdf.format(new Date());
String downloadName = filePrefix ".zip";
//将文件进行打包下载
try {
OutputStream out = response.getOutputStream();
//接收压缩包字节
byte[] data = createZip(sourceFilePath);
response.reset();
response.addHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Expose-Headers", "*");
response.setHeader("Content-disposition", "attachment;filename*=utf-8''" downloadName);
response.addHeader("Content-Length", "" data.length);
response.setContentType("application/octet-stream;charset=UTF-8");
IOUtils.write(data, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
客户端调用方法:
代码语言:javascript复制 @GetMapping("/exportFile")
public Result exportFile(HttpServletResponse response) {
//第二个参数为:要压缩文件的地址
FileZipUtil.exportZip(response, "/Users/Downloads");
}