字符与数字和ASCII码相互转换

秒速五厘米 2022-06-02 23:55 331阅读 0赞

public class Test { 
    
        public static void main(String[] args) {    
            String asciiStr = stringToAscii("0123456789abcdefghijklmnopqrstuvwxyz");
            System.out.println(asciiStr);//48,49,50,51,52,53,54,55,56,57,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,
            System.out.println(asciiToString(asciiStr));//0123456789abcdefghijklmnopqrstuvwxyz
        }
    
        /** * 第33～126号(共94个)是字符，其中第48～57号为0～9十个阿拉伯数字 * @param val * @return * * @author HuangSL * @since 2017/12/01 */
        public static String stringToAscii(String val) {
    
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < val.length(); i++) {
                char c = val.charAt(i);
                builder.append((byte) c).append(",");
            }
    
            return builder.toString();
        }
    
        public static String asciiToString(String val) {
    
            String[] asciiArr = val.split(",");
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < asciiArr.length; i++) {
                builder.append((char)Integer.parseInt(asciiArr[i]));
            }
    
            return builder.toString();
        }
    
    }

关于 ASCII的相关信息，请关注以下文章：

> [ASCII (包括Java中2种表示ASCII的方式)][ASCII _Java_2_ASCII]

需要注意的是:  
ASCII 编码与 Unicode 编码不一样,0到9的unicode值如下:  
\\u0030 数字 0  
\\u0031 数字 1  
\\u0032 数字 2  
\\u0033 数字 3  
\\u0034 数字 4  
\\u0035 数字 5  
\\u0036 数字 6  
\\u0037 数字 7  
\\u0038 数字 8  
\\u0039 数字 9

[ASCII _Java_2_ASCII]: http://blog.csdn.net/chy555chy/article/details/51938914