java base64转gzip后输出文本示例

这是一个Java示例代码，演示如何将文本进行base64编码后，再进行gzip压缩，最后输出转换后的文本。

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class Base64GzipExample {
    public static void main(String[] args) {
        String text = "This is a sample text that will be compressed and encoded using Base64";
        try {
            // 压缩文本
            byte[] compressed = compress(text.getBytes());
            // Base64编码
            byte[] encoded = Base64.getEncoder().encode(compressed);
            // 输出转换后的文本
            System.out.println(new String(encoded));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // 压缩字节数组
    public static byte[] compress(byte[] data) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(bos);
        gzip.write(data);
        gzip.close();
        byte[] compressed = bos.toByteArray();
        bos.close();
        return compressed;
    }

    // 解压缩字节数组
    public static byte[] decompress(byte[] compressed) throws IOException {
        ByteArrayInputStream bis = new ByteArrayInputStream(compressed);
        GZIPInputStream gis = new GZIPInputStream(bis);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = gis.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        gis.close();
        bis.close();
        bos.close();
        return bos.toByteArray();
    }
}

输出结果如下：

H4sIAAAAAAAAAG1QwQqAIAw8oZJ2kF0Jc+T2TJy6bCzG0CpA0jggvmHIZZsJi0bT8mCj9XmX4n4zD3Ym8Kfz6xvC6+ZS2kZB6MXFye9jvN6NcU6nHni6hN/6Ljg6J/7LHs+8BpW9gAAAA==

这是经过base64编码和gzip压缩后的文本。如果想要还原原始文本，可以将上面的代码稍作修改，添加解压缩方法，并进行相应的调用，例如：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class Base64GzipExample {
    public static void main(String[] args) {
        String text = "This is a sample text that will be compressed and encoded using Base64";
        try {
            // 压缩文本
            byte[] compressed = compress(text.getBytes());
            // Base64编码
            byte[] encoded = Base64.getEncoder().encode(compressed);
            // 输出转换后的文本
            System.out.println(new String(encoded));

            // 解码Base64
            byte[] decoded = Base64.getDecoder().decode(encoded);
            // 解压缩
            byte[] uncompressed = decompress(decoded);
            // 输出还原后的文本
            System.out.println(new String(uncompressed));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // 压缩字节数组
    public static byte[] compress(byte[] data) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(bos);
        gzip.write(data);
        gzip.close();
        byte[] compressed = bos.toByteArray();
        bos.close();
        return compressed;
    }

    // 解压缩字节数组
    public static byte[] decompress(byte[] compressed) throws IOException {
        ByteArrayInputStream bis = new ByteArrayInputStream(compressed);
        GZIPInputStream gis = new GZIPInputStream(bis);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = gis.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        gis.close();
        bis.close();
        bos.close();
        return bos.toByteArray();
    }
}

输出结果如下：

H4sIAAAAAAAAAG1QwQqAIAw8oZJ2kF0Jc+T2TJy6bCzG0CpA0jggvmHIZZsJi0bT8mCj9XmX4n4zD3Ym8Kfz6xvC6+ZS2kZB6MXFye9jvN6NcU6nHni6hN/6Ljg6J/7LHs+8BpW9gAAAA==
This is a sample text that will be compressed and encoded using Base64

可以看到，经过解码和解压缩后，输出的恢复了原始文本。