java代码(ascii与字母互转)

package test;

/**

* Java中将一个字符与对应Ascii码互转

* 1 byte = 8bit 可以表示 0-127

*/

public class GetCharAscii

{

    /*0-9对应Ascii 48-57

    *A-Z 65-90

    *a-z 97-122

    *33126(94)是字符,其中第4857号为09十个阿拉伯数字

    */

    public static void main(String[] args)

    {

        // System.out.println(charToByteAscii('9'));

        // System.out.println(byteAsciiToChar(57));

        System.out.println(SumStrAscii("="));

        System.out.println(SumStrAscii(">"));

    }

    /**

    * 方法一:将char 强制转换为byte

    * @param ch

    * @return

    */

    public static byte charToByteAscii(char ch)

    {

        byte byteAscii = (byte)ch;

        return byteAscii;

    }

    /**

    * 方法二:将char直接转化为int,其值就是字符的ascii

    * @param ch

    * @return

    */

    public static byte charToByteAscii2(char ch)

    {

        byte byteAscii = (byte)ch;

        return byteAscii;

    }

    /**

    * 同理,ascii转换为char 直接int强制转换为char

    * @param ascii

    * @return

    */

    public static char byteAsciiToChar(int ascii)

    {

        char ch = (char)ascii;

        return ch;

    }

    /**

    * 求出字符串的ASCII值和

    * 注意,如果有中文的话,会把一个汉字用两个byte来表示,其值是负数

    */

    public static int SumStrAscii(String str)

    {

        byte[] bytestr = str.getBytes();

        int sum = 0;

        for(int i = 0; i < bytestr.length; i++)

        {

            sum += bytestr[i];

        }

        return sum;

    }

}

原文地址:https://www.cnblogs.com/NiceTime/p/6758650.html