编码与解码方法收集

    //编码 sun.misc.BASE64Decoder
    @Test
    public void t9(){
        BASE64Encoder encoder = new BASE64Encoder() ;
        String r = "" ; 
        try {
            r = encoder.encode("中国".getBytes("utf-8")) ;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } 
        System.out.println(r); //5Lit5Zu9
    }
    
    //解码sun.misc.BASE64Decoder
    @Test
    public void t10(){
        BASE64Decoder decoder = new BASE64Decoder() ; 
        String r = "" ; 
        try {
            r = new String(decoder.decodeBuffer("5Lit5Zu9"), "utf-8") ; 
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } 
        System.out.println(r);//中国
    }

        //编码java.net.URLEncoder
    @Test
    public void t11(){
        String r = "" ; 
        try {
            r = URLEncoder.encode("中国", "utf-8") ; 
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } 
        System.out.println(r); //%E4%B8%AD%E5%9B%BD
    }
    
    //解码java.net.URLDecoder
    @Test
    public void t12(){
        String r = "" ; 
        try {
            r = URLDecoder.decode("%E4%B8%AD%E5%9B%BD", "utf-8") ; 
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } 
        System.out.println(r);//中国
    }