如标题所述,如何解压使用zlib deflate算法压缩的字符串?请提供一种可靠方法并加以解释。
试试这个 - 这是一个最小的工作示例:
package zlib.example;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Arrays;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
/**
* Created by keocra on 08.10.15.
*/
public class Main {
private final static String inputStr = "Hello World!";
public static void main(String[] args) throws Exception {
System.out.println("Will zlib compress following string: " + inputStr);
// will compress "Hello World!"
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DeflaterOutputStream dos = new DeflaterOutputStream(baos);
dos.write(inputStr.getBytes());
dos.flush();
dos.close();
// at this moment baos.toByteArray() holds the compressed data of "Hello World!"
// will decompress compressed "Hello World!"
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
InflaterInputStream iis = new InflaterInputStream(bais);
String result = "";
byte[] buf = new byte[5];
int rlen = -1;
while ((rlen = iis.read(buf)) != -1) {
result += new String(Arrays.copyOf(buf, rlen));
}
// now result will contain "Hello World!"
System.out.println("Decompress result: " + result);
}
}
你也应该很容易地将这个例子扩展到压缩/解压缩文件。
希望对你有所帮助;-)
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