Base64编码与解码

import java.io.UnsupportedEncodingException;

/**
 * Base64工具类
 * @author liqijing
 *
 */
public class Base64Tools {

	
	// 加密  
    @SuppressWarnings("restriction")
	public static String getBase64(String str) {  
        byte[] b = null;  
        String s = null;  
        try {  
            b = str.getBytes("utf-8");  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
        if (b != null) {  
            s = new sun.misc.BASE64Encoder().encode(b);  
        }  
        return s;  
    }  
  
    // 解密  
    @SuppressWarnings("restriction")
	public static String getFromBase64(String s) {  
        byte[] b = null;  
        String result = null;  
        if (s != null) {  
        	sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();  
            try {  
                b = decoder.decodeBuffer(s);  
                result = new String(b, "utf-8");  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }  
        return result;  
    } 
}