简单的字符转换和反转换函数

愚人码头

加密解密时可以用到，只支持小写字母的转换。 private String dmix(String str1) { int MAX_COUNT = 20; char ca[] = str1.toCharArray(); int count = 0; for(int i = 0; i < ca.length; i ) { int a = ca[i] - count; ca[i] = (char)a; if(ca[i] < 'a') ca[i] = '\032'; count = count % MAX_COUNT; } StringBuffer sb = new StringBuffer(); sb.append(ca); return sb.toString(); } public String mix(String str1) { int MAX_COUNT = 20; char ca[] = str1.toCharArray(); int count = 0; for(int i = 0; i < ca.length; i ) { int a=0; a = ca[i] count; ca[i] = (char)a; if(ca[i] > 'z') ca[i] -= '\032'; count = count % MAX_COUNT; } StringBuffer sb = new StringBuffer(); sb.append(ca); return sb.toString(); }