删除一部分Hexa Message 以获得好消息

Question

I tried to convert a String of Hex chars to a String using this method:

public String HexToString(String inputString){
    StringBuilder output = new StringBuilder();
    for (int i = 0; i < inputString.length(); i+=2) {
        String str = inputString.substring(i, i+2);
        output.append((char)Integer.parseInt(str, 16));
    }
    return output.toString();
}

Input is:

"4d442020000000020000000000000008ffffffff000000000000022200‌​0001b54d514852463220‌​20000000000000000141‌​4d5120434d504c4c3333‌​2020202020d75db05811‌​51d02000000000000000‌​00000000000000000000‌​00000000000000000000‌​00202020202020202020‌​20202020202020202020‌​20202020202020202020‌​20202020202020202020‌​20202020202020202043‌​4d504c4c333320202020‌​20202020202020202020‌​20000000000000000000‌​00000000020202020202‌​02020202020202020202‌​02020202020202020202‌​02020202020200000001‌​c7765626c6f6...."

This method works, but the problem that my message contains strange chars. After converting I received in the header this characters: "µMQHRF2"

The question is how could i delete this header ? Should i do it when the message is on Hexa or after converting ? and how can i delete this characters from my string ?

Answer 1

You can use an apache commons library. Here is the link

https://commons.apache.org/proper/commons-codec/apidocs/org/apache/commons/codec/binary/Hex.html