java 实现 Convert Hex To ASCII

最新推荐文章于 2023-11-15 09:51:11 发布

原创最新推荐文章于 2023-11-15 09:51:11 发布 · 247 阅读

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本文提供了一个简单的Java程序实例，演示如何将ASCII字符串转换为十六进制表示，再将其逆向转换回原始ASCII字符串。该程序包括两个核心方法：convertStringToHex用于ASCII到Hex的转换；convertHexToString用于Hex到ASCII的转换。

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public class test {

public static void main(String[] args) {
System.out.println("\n***** Convert ASCII to Hex *****");
//String str = "I Love Java!";
String str = "12345abcd";
System.out.println("Original input : " + str);

String hex = convertStringToHex(str);

System.out.println("Hex : " + hex);

System.out.println("\n***** Convert Hex to ASCII *****");
System.out.println("Hex : " + hex);
System.out.println("ASCII : " + convertHexToString(hex));
}
public static String convertStringToHex(String str){

char[] chars = str.toCharArray();

StringBuffer hex = new StringBuffer();
for(int i = 0; i < chars.length; i++){
hex.append(Integer.toHexString((int)chars[i]));
}

return hex.toString();
}

public static String convertHexToString(String hex){

StringBuilder sb = new StringBuilder();
StringBuilder temp = new StringBuilder();

//49204c6f7665204a617661 split into two characters 49, 20, 4c...
for( int i=0; i<hex.length()-1; i+=2 ){

//grab the hex in pairs
String output = hex.substring(i, (i + 2));
//convert hex to decimal
int decimal = Integer.parseInt(output, 16);
//convert the decimal to character
sb.append((char)decimal);

temp.append(decimal);
}
System.out.println("Decimal : " + temp.toString());

return sb.toString();
}

}