Java使用MimeUtility对字符串做Base64转换，mimeutilitybase64,import java.

Java使用MimeUtility对字符串做Base64转换，mimeutilitybase64,import java.

import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.io.OutputStream;import javax.mail.internet.MimeUtility;public class Base64 { public static byte[] encode(byte[] b) throws Exception {  ByteArrayOutputStream baos = null;  OutputStream b64os = null;  try {   baos = new ByteArrayOutputStream();   b64os = MimeUtility.encode(baos, "base64");   b64os.write(b);   b64os.close();   return baos.toByteArray();  } catch (Exception e) {   throw new Exception(e);  } finally {   try {    if (baos != null) {     baos.close();     baos = null;    }   } catch (Exception e) {   }   try {    if (b64os != null) {     b64os.close();     b64os = null;    }   } catch (Exception e) {   }  } } public static byte[] decode(byte[] b) throws Exception {  ByteArrayInputStream bais = null;  InputStream b64is = null;  try {   bais = new ByteArrayInputStream(b);   b64is = MimeUtility.decode(bais, "base64");   byte[] tmp = new byte[b.length];   int n = b64is.read(tmp);   byte[] res = new byte[n];   System.arraycopy(tmp, 0, res, 0, n);   return res;  } catch (Exception e) {   throw new Exception(e);  } finally {   try {    if (bais != null) {     bais.close();     bais = null;    }   } catch (Exception e) {   }   try {    if (b64is != null) {     b64is.close();     b64is = null;    }   } catch (Exception e) {   }  } }}