Considerations for choosing a Chinese encoding scheme

There is a case to note: In a codec process, encoding scheme and decoding scheme are selected GB2312, but the process of completing the coding is a Java program, the process of completing the decoding procedure is a C/s program.
By the Chinese encoding scheme, in Java programs, the choice of using GB2312 Chinese encoding scheme, the actual encoding scheme is jdk-gb2312; in C + + programs, when the GB2312 Chinese encoding scheme is selected, the actual encoding scheme used is the old CP936.
Therefore, although the encoding and decoding process to choose the encoding scheme are GB2312, but in fact, the encoding and decoding process is actually used in the encoding scheme is different, decoding process may appear garbled.