*
* Base64.java
*
* Created on 2008-5-5, 11:11:32
*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.mop.pushmail.utils;
import javax.mail.internet.MimeUtility;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
//import java.io.RandomAccessFile;
/**
*
* @author muning
*/
public class Base64 {
public Base64() {
}
public static BufferedReader decode(String b64string) throws Exception {
return new BufferedReader(
new InputStreamReader(
MimeUtility.decode(
new ByteArrayInputStream(b64string.getBytes()), "base64")));
}
public static void main(String args[]) throws Exception{
// if (args.length != 2){
// System.err.println("Usage: java Base64 encORdec yourStrings");
// System.exit(0);
// }
// String str1 = args[0].trim();
// String str1 = "dec";
// String str2 = "好人";
// String str3 = "";
// if (str1.equalsIgnoreCase("enc")){
// System.out.println(encodeAsString(str2));
// }
// else if(str1.equalsIgnoreCase("dec")){
// System.out.println(decodeAsString(str3));
// }
// else{
// System.err.println("Usage: java Base64 encORdec yourStrings");
// System.exit(0);
// }
// String filename = "D:\\111.pdf";
// Base64Encode(filename);
// String filename1 = "D:\\111.txt";
// Base64Decode(filename1);
// System.out.println(System.getProperties());
String test = "穆宁";
byte[] bytes = test.getBytes("UTF-8");
String result = new String(bytes, "UTF-8");
System.out.println("Receive value: [" + result + "].");
}
public static String Base64Encode(String filename) {
//int ret = -1;
String content = null;
FileInputStream fileforinput = null;
try {
fileforinput = new FileInputStream(filename);
byte[] bytes = new byte[fileforinput.available()];
fileforinput.read(bytes);
content = new sun.misc.BASE64Encoder().encode(bytes);
fileforinput.close();
return content;
// RandomAccessFile inOut = new RandomAccessFile("d:\\doc64.txt","rw");
// inOut.write(content.getBytes());
// inOut.close();
// ret = 0;
}
catch (Exception ex) {
ex.printStackTrace();
return null;
}
// return ret;
}
// 文件内容是base64编码的，还原成base64编码前的模样
public static byte[] Base64Decode(String filename) {
String original = null;
FileInputStream fis = null;
byte[] bytes = null;
byte[] result = null;
try {
fis = new FileInputStream(filename);
bytes = new byte[fis.available()];
fis.read(bytes);
original = new String(bytes);
// String temp = new String(bytes,"utf-8");
// original = new String(temp.getBytes("iso-8859-1"),"utf-8");
result = new sun.misc.BASE64Decoder().decodeBuffer(original.trim());
}
catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
public static String decodeAsString(String b64string) throws Exception {
if (b64string == null) {
return b64string;
}
String returnString = decode(b64string).readLine();
if (returnString == null) {
return returnString;
}
return returnString.trim();
}
public static ByteArrayOutputStream encode(String plaintext,String charset) throws Exception{
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] in = plaintext.getBytes(charset);
ByteArrayOutputStream inStream = new ByteArrayOutputStream();
inStream.write(in, 0, in.length);
// pad
if ((in.length % 3 ) == 1){
inStream.write(0);
inStream.write(0);
}
else if((in.length % 3 ) == 2){
inStream.write(0);
}
inStream.writeTo( MimeUtility.encode(out, "base64") );
return out;
}
public static String encodeAsString(String plaintext) throws Exception {
return encode(plaintext,"UTF-8").toString();
}
public static String encodeAsString(String plaintext,String charset) throws Exception {
return encode(plaintext,charset).toString();
}
}
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