java中base64

// 将 s 进行 BASE64 编码
public static String getBASE64(String s) {
if (s == null) return null;
return (new sun.misc.BASE64Encoder()).encode( s.getBytes() );
}

// 将 BASE64 编码的字符串 s 进行解码
public static String getFromBASE64(String s) {
if (s == null) return null;
BASE64Decoder decoder = new BASE64Decoder();
try {
byte[] b = decoder.decodeBuffer(s);
return new String(b);
} catch (Exception e) {
return null;
}
}

或者apache的包

?

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import java.io.UnsupportedEncodingException;   import org.apache.commons.codec.binary.Base64; public class Base64Util {         /**      * 将二进制数据编码为BASE64字符串      * @param binaryData      * @return      */     public static String encode(byte[] binaryData) {         try {             return new String(Base64.encodeBase64(binaryData), "UTF-8");         } catch (UnsupportedEncodingException e) {             return null;         }     }           /**      * 将BASE64字符串恢复为二进制数据      * @param base64String      * @return      */     public static byte[] decode(String base64String) {         try {             return Base64.decodeBase64(base64String.getBytes("UTF-8"));         } catch (UnsupportedEncodingException e) {             return null;         }     }   }