Base64

Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation.

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that is designed to deal with textual data.

用到java包

　　　　 <dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>

小样

import java.io.UnsupportedEncodingException;

import net.sf.json.JSONArray;

import org.apache.commons.codec.binary.Base64;

public class Test {
public static void main(String[] args) throws UnsupportedEncodingException{
// 工具
Base64 base64 = new Base64();
// 现有byte[]
byte[] bytes = new byte[] { -25, -69, -76, -27, -97, -70, -25, -103, -66, -25, -89, -111 };
// 转成字符串，存储或者传输
String s = base64.encodeAsString(bytes); // 57u05Z+655m+56eR
// 待使用byte[] 时，将字符串解码
bytes = base64.decode(s);
System.out.println(JSONArray.fromObject(bytes).toString());
// 原始byte[] 是这样的
System.out.println(new String(bytes, "utf-8"));
}

}

打印结果：

[-25,-69,-76,-27,-97,-70,-25,-103,-66,-25,-89,-111]
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