一、ZipInputStream相对于ZipOutputStream而言,使用上面简单的多了,相对的,既然存在压缩流,就会存在,解压的方式。
二、解压文件,流的使用过程中也是很常用的,在读取文件,根据文件类型进行处理,这样,就可以做到,最低成本的数据传输了
三、解压例子
/**
* 提供给用户使用的解压工具
* @param srcPath
* @param outPath
* @throws IOException
*/
public static void decompressionFile(String srcPath, String outPath) throws IOException {
//简单判断解压路径是否合法
if (!new File(srcPath).isDirectory()) {
//判断输出路径是否合法
if (new File(outPath).isDirectory()) {
if (!outPath.endsWith(File.separator)) {
outPath += File.separator;
}
//zip读取压缩文件
FileInputStream fileInputStream = new FileInputStream(srcPath);
ZipInputStream zipInputStream = new ZipInputStream(fileInputStream);
//解压文件
decompressionFile(outPath, zipInputStream);
//关闭流
zipInputStream.close();
fileInputStream.close();
} else {
throw new RuntimeException("输出路径不合法!");
}
} else {
throw new RuntimeException("需要解压的文件不合法!");
}
}
/**
* ZipInputStream是逐个目录进行读取,所以只需要循环
* @param outPath
* @param inputStream
* @throws IOException
*/
private static void decompressionFile(String outPath, ZipInputStream inputStream) throws IOException {
//读取一个目录
ZipEntry nextEntry = inputStream.getNextEntry();
//不为空进入循环
while (nextEntry != null) {
String name = nextEntry.getName();
File file = new File(outPath+name);
//如果是目录,创建目录
if (name.endsWith("/")) {
file.mkdir();
} else {
//文件则写入具体的路径中
FileOutputStream fileOutputStream = new FileOutputStream(file);
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
int n;
byte[] bytes = new byte[1024];
while ((n = inputStream.read(bytes)) != -1) {
bufferedOutputStream.write(bytes, 0, n);
}
//关闭流
bufferedOutputStream.close();
fileOutputStream.close();
}
//关闭当前布姆
inputStream.closeEntry();
//读取下一个目录,作为循环条件
nextEntry = inputStream.getNextEntry();
}
}
四、测试:
public static void main(String[] args) throws IOException {
decompressionFile("D:\\srv.zip", "D:\\test");
}
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