java获取图片打成压缩包
java打压缩包时很简单的,使用ZipOutputStream写出来的流就是压缩包的流了,需要获取压缩包的zip的byte[]字节流,就写到ByteArrayOutputStream上,需要写到硬盘上就写到FileOutputStream上
@Test public void imgToZip(){
//百度随便搜的图片
List<String> list = Arrays.asList("http://f.hiphotos.baidu.com/image/pic/item/b151f8198618367aa7f3cc7424738bd4b31ce525.jpg",
"http://a.hiphotos.baidu.com/image/pic/item/aa18972bd40735fa4e6e4b2194510fb30e24088f.jpg",
"http://c.hiphotos.baidu.com/image/pic/item/023b5bb5c9ea15ced43db9a0bc003af33b87b24c.jpg");
//需要获取byte字节流就用ByteArrayOutputStream,指向内存的流可以不用关闭,指向存储卡/硬盘的流一定要关闭
//ByteArrayOutputStream out = new ByteArrayOutputStream();
try (FileOutputStream out = new FileOutputStream("D:/1.zip");
ZipOutputStream zipOutputStream = new ZipOutputStream(out)) {
zipOutputStream.setMethod(ZipOutputStream.DEFLATED);
for (int i = 0 ; i < list.size(); i++) {
try (InputStream inputStream = new URL(list.get(i)).openStream()) {
if (inputStream != null && inputStream.available() > 0) {
zipOutputStream.putNextEntry(new ZipEntry(i+".png"));
byte[] b = new byte[1024];
int l;
while ((l = inputStream.read(b)) != -1) {
zipOutputStream.write(b, 0, l);
}
zipOutputStream.closeEntry();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
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