Java字符串压缩存储

最新推荐文章于 2024-09-11 23:34:55 发布

原创最新推荐文章于 2024-09-11 23:34:55 发布 · 2.9k 阅读

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#java #string #import #buffer #byte #null

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import java.io.ByteArrayInputStream;  
import java.io.ByteArrayOutputStream;  
import java.io.IOException;  
import java.util.zip.GZIPInputStream;  
import java.util.zip.GZIPOutputStream;  
  
public class StringCompression {  

    static String  code="UTF-8";  
    public static String compress(String str) throws IOException {  
        System.out.println("压缩之前的字符串大小："+str.length());  
        if (str == null || str.length() == 0) {  
            return str;  
        }  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        GZIPOutputStream gzip = new GZIPOutputStream(out);  
        gzip.write(str.getBytes());  
        gzip.close();  
        return out.toString("ISO-8859-1");  
    }  
  
    public static String uncompress(String str) throws IOException {  
        System.out.println("压缩之后的字符串大小："+str.length());  
        if (str == null || str.length() == 0) {  
            return str;  
        }  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        ByteArrayInputStream in = new ByteArrayInputStream(str.getBytes("ISO-8859-1"));  
        GZIPInputStream gunzip = new GZIPInputStream(in);  
        byte[] buffer = new byte[256];  
        int n;  
        while ((n = gunzip.read(buffer)) >= 0) {  
            out.write(buffer, 0, n);  
        }  
        return out.toString();  
    }  
  
    public static void main(String[] args) throws IOException {  
          
    	System.out.println(StringCompression.compress("fdsagagdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss"));
        System.out.println(StringCompression.uncompress(StringCompression.compress("fsafgdfdsgfdgfdghfhgfhgfhdgdsfagdsgdasgddddddddddddddddddddddddd")));
    }
}