开发过程用到了zip压缩包，写了一个工具类，该类可以实现把字符串直接压缩成zip格式，省去了写入文件再压缩的步骤：
/**
*
* @author shx
* 压缩和解压缩工具
*
*/
public class ZipUtil {
/**
* 压缩方法
* @param str 要压缩的字符串
* @param path 路径
* @throws IOException
*/
public static void compress(String str,String path) throws IOException {
if (null == str || str.length() <= 0) {
return;
}
FileOutputStream fileOutputStream = new FileOutputStream(path);
GZIPOutputStream gzip = new GZIPOutputStream(fileOutputStream);
gzip.write(str.getBytes("utf-8"));
gzip.close( );
fileOutputStream.close();
}
/**
* 解压缩
* @param context
* @param path
* @return
*/
public static String unCompress(Context context,String path) {
try {
File file = new File(path);
if (!file.exists()) {
return context.getResources().getString(R.string.FileNotExits);
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
// 创建一个新的输出流
FileInputStream fileInputStream = new FileInputStream(path);
GZIPInputStream gzip = new GZIPInputStream(fileInputStream);
byte[] buffer = new byte[256];
int n = 0;
// 将未压缩数据读入字节数组
while ((n = gzip.read(buffer)) >= 0) {
out.write(buffer, 0, n);
}
return out.toString("utf-8");
} catch (Exception e) {
e.printStackTrace();
}
return null;
}