本文实例为大家分享了java多文件以zip压缩包导出的具体代码，供大家参考，具体内容如下
1、使用java实现吧服务器的图片打包成一个zip格式的压缩包导出，多个文件打包导出。
2、代码如下：
**imagebyteutil.java**
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public class imagebyteutil{
private static float quality = 0.6f;
public static void compresszip(list<file> listfiles, outputstream output,string encode, boolean compress,string alias){
zipoutputstream zipstream = null;
try {
zipstream = new zipoutputstream(output);
for (file file : listfiles){
compresszip(file, zipstream, compress,alias+"_"+(listfiles.indexof(file)+1));
}
} catch (exception e) {
e.printstacktrace();
}finally {
try {
if (zipstream != null) {
zipstream.close();
}
} catch (ioexception e) {
e.printstacktrace();
}
}
}
private static void compresszip(file file, zipoutputstream zipstream,
boolean compress,string alias) throws exception{
fileinputstream input = null;
try {
input = new fileinputstream(file);
//zip(input, zipstream, file.getname(), compress);
zip(input, zipstream, alias+"."+file.getname().substring(file.getname().lastindexof(".")+1), compress);
} catch (exception e) {
e.printstacktrace();
}finally {
try {
if(input != null)
input.close();
} catch (ioexception e) {
e.printstacktrace();
}
}
}
private static void zip(inputstream input, zipoutputstream zipstream,
string zipentryname, boolean compress) throws exception{
byte[] bytes = null;
bufferedinputstream bufferstream = null;
try {
if(input == null)
throw new exception("获取压缩的数据项失败! 数据项名为：" + zipentryname);
// 压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样
zipentry zipentry = new zipentry("图片/"+zipentryname);
// 定位到该压缩条目位置，开始写入文件到压缩包中
zipstream.putnextentry(zipentry);
if (compress) {
bytes = imagebyteutil.compressofquality(input, 0);
zipstream.write(bytes, 0, bytes.length);
} else {
bytes = new byte[1024 * 5];// 读写缓冲区
bufferstream = new bufferedinputstream(input);// 输入缓冲流
int read = 0;
while ((read = bufferstream.read(bytes)) != -1) {
zipstream.write(bytes, 0, read);
}
}
} catch (ioexception e) {
e.printstacktrace();
} finally {
try {
if (null != bufferstream)
bufferstream.close();
} catch (ioexception e) {
e.printstacktrace();
}
}
}
public static byte[] compressofquality(file file, float quality) throws exception{
byte[] bs = null;
inputstream input = null;
try {
input = new fileinputstream(file);
bs = compressofquality(input,quality);
} catch (exception e) {
e.printstacktrace();
} finally {
try {
if (input != null)
input.close();
} catch (ioexception e) {
e.printstacktrace();
}
}
return bs;
}
public static byte[] compressofquality(inputstream input, float quality)
throws exception {
bytearrayoutputstream output = null;
try {
output = new bytearrayoutputstream();
if(quality == 0){
thumbnails.of(input).scale(1f).outputquality(quality)
.tooutputstream(output);
} else {
thumbnails.of(input).scale(1f).outputquality(quality).tooutputstream(output);
}
return output.tobytearray();
} catch (exception e) {
e.printstacktrace();
} finally {
try {
if (output != null)
output.close();
} catch (ioexception e) {
e.printstacktrace();
}
}
return null;
}
}
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**main.java**
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public static void main(string[] args){
//要导出的文件集合,添加自己需要导出的文件
list<file> listfiles = new arraylist<>();
//调用工具类,参数说明（需要导出的文件集，bytearrayoutputstream对象，编码，是否压缩【true，false】，文件名称前缀）
imagebyteutil.compresszip(listfiles, out, "utf-8", false,"lwj");
//指定导出格式
returncontext.addparam("exportfilename","extfile.zip");
returncontext.addparam("mimetype", "zip");
return in;
}
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3、此功能是根据在开发过程中项目需要实现的，测试可正常使用，可更改定制。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/lovelongjun/article/details/76104192