44 lines
1.3 KiB
Java
44 lines
1.3 KiB
Java
package com.zcloud.util;
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import java.io.File;
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import java.io.*;
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import java.util.List;
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import java.util.zip.*;
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public class CompressDownloadUtil {
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/**
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* 将多个文件压缩到指定输出流中
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*
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* @param files 需要压缩的文件列表
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* @param outputStream 压缩到指定的输出流
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* @author hongwei.lian
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* @date 2018年9月7日 下午3:11:59
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*/
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public static void compressZip(List<File> files, OutputStream outputStream) {
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ZipOutputStream zipOutStream = null;
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try {
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//-- 包装成ZIP格式输出流
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zipOutStream = new ZipOutputStream(new BufferedOutputStream(outputStream));
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// -- 设置压缩方法
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zipOutStream.setMethod(ZipOutputStream.DEFLATED);
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//-- 将多文件循环写入压缩包
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for (int i = 0; i < files.size(); i++) {
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File file = files.get(i);
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FileInputStream filenputStream = new FileInputStream(file);
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byte[] data = new byte[(int) file.length()];
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filenputStream.read(data);
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//-- 添加ZipEntry，并ZipEntry中写入文件流，这里，加上i是防止要下载的文件有重名的导致下载失败
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zipOutStream.putNextEntry(new ZipEntry(i + file.getName()));
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zipOutStream.write(data);
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filenputStream.close();
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zipOutStream.closeEntry();
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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