Полезная информация

Java in a Nutshell

Previous Chapter 31
The java.util.zip Package

31.16 java.util.zip.ZipInputStream (JDK 1.1)

This class is a subclass of InflaterInputStream that reads the entries of a ZIP file in sequential order. A ZipInputStream is created by specifying the InputStream from which it is to read the contents of the ZIP file. Once the ZipInputStream is created, the getNextEntry() method is used to begin reading of data from the next entry in the ZIP file. This method must be called before read() is called to begin reading of the first entry. Note that getNextEntry() returns a ZipEntry object that describes the entry being read. Also note that getNextEntry() returns null when there are no more entries to be read from the ZIP file.

The read() methods of ZipInputStream read until the end of the current entry and then return -1 indicating that there are no more data to read. To continue with the next entry in the ZIP file, you must call getNextEntry() again. Similarly, the skip() method only skips bytes within the current entry. closeEntry() can be called to skip the remaining data in the current entry, but it is usually easier simply to call getNextEntry() to begin the next entry.

public class ZipInputStream extends InflaterInputStream {
    // Public Constructor
            public ZipInputStream(InputStream in);
    // Public Instance Methods
            public void close() throws IOException;  // Overrides FilterInputStream
            public void closeEntry() throws IOException;
            public ZipEntry getNextEntry() throws IOException;
            public int read(byte[] b, int off, int len) throws IOException;  // Overrides InflaterInputStream
            public long skip(long n) throws IOException;  // Overrides InflaterInputStream



Previous Home Next
java.util.zip.ZipFile (JDK 1.1) Book Index java.util.zip.ZipOutputStream (JDK 1.1)

Java in a Nutshell Java Language Reference Java AWT Java Fundamental Classes Exploring Java