Java 字符串 压缩 解压

实现字符串的压缩和解压功能
需要导入的jar

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

直接上代码

	public static String compress(String str) throws IOException {
       if (str == null || str.length() == 0) {
           return str;
       }
       ByteArrayOutputStream out = new ByteArrayOutputStream();
       try {
           GZIPOutputStream gzip = new GZIPOutputStream(out);
           gzip.write(str.getBytes("UTF-8"));
           gzip.close();
           return out.toString("ISO-8859-1");
       } catch (Exception e) {
           return "";
       } finally {
           if (out != null) {
               out.close();
           }
       }
   }
	
	
	
	public static String uncompress(String str) throws IOException {
       if (str == null || str.length() == 0) {
           return str;
       }
       ByteArrayOutputStream out = new ByteArrayOutputStream();
       try{
           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("UTF-8");
       }catch (Exception ex){
       	ex.printStackTrace();
           return str;
       } finally {
           if (out != null) {
               out.close();
           }
       }
   }

内容不多，就一个压缩，一个解压