#### 编码和解码的区别

编码： string->byte 从看得懂到看不懂

解码：byte->string 从看不懂到看得懂

 //string->byte[]   编码
        String str3 = "456";
        byte[] by = str.getBytes();
        System.out.println(Arrays.toString(by));
        //byte -> string 解码
        String str33 = new String(by);
        System.out.println(str33);