Java打包多文件成zip

package com.zh.java.util;

import lombok.extern.slf4j.slf4j;

import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.util.list;
import java.util.zip.zipentry;
import java.util.zip.zipoutputstream;

import static org.springframework.util.streamutils.buffer_size;

/**
 * author: zh
 * desc: 压缩包工具类
 * date: created in 2018/5/19 13:51
 */
@slf4j
public class ziputil {

    /**
     * 把文件集合打成zip压缩包
     * @param srcfiles 压缩文件集合
     * @param zipfile  zip文件名
     * @throws runtimeexception 异常
     */
    public static void tozip(list<file> srcfiles, file zipfile) throws runtimeexception {
        long start = system.currenttimemillis();
        if(zipfile == null){
            log.error("压缩包文件名为空！");
            return;
        }
        if(!zipfile.getname().endswith(".zip")){
            log.error("压缩包文件名异常，zipfile={}", zipfile.getpath());
            return;
        }
        zipoutputstream zos = null;
        try {
            fileoutputstream out = new fileoutputstream(zipfile);
            zos = new zipoutputstream(out);
            for (file srcfile : srcfiles) {
                byte[] buf = new byte[buffer_size];
                zos.putnextentry(new zipentry(srcfile.getname()));
                int len;
                fileinputstream in = new fileinputstream(srcfile);
                while ((len = in.read(buf)) != -1) {
                    zos.write(buf, 0, len);
                }
                zos.setcomment("我是注释");
                zos.closeentry();
                in.close();
                out.close();
            }
            long end = system.currenttimemillis();
            log.info("压缩完成，耗时：" + (end - start) + " ms");
        } catch (exception e) {
            log.error("ziputil tozip exception, ", e);
            throw new runtimeexception("zipfile error from ziputils", e);
        } finally {
            if (zos != null) {
                try {
                    zos.close();
                } catch (ioexception e) {
                    log.error("ziputil tozip close exception, ", e);
                }
            }
        }
    }

}