对字符串进行加密解密
java,对字符串(例:密码)进行加密解密,注意这个区分字符串大小写..........加密-----------------------------------------------------------------------------public String encodePWS(String SourceStr) { String RetStr = ""; for (int i = 0; i <= SourceStr.length()-1; i++) { char c = SourceStr.charAt(i); int h = (c >> 4) & 0xf;// 高4位 System.out.print(h); int l = c & 0xf; // 低4位 RetStr = RetStr + (char)('a' + h) + (char)('a' + l); } System.out.println(RetStr.length()); return RetStr;}解密------------------------------------------------------------------------------public String decodePWS(String SourceStr) {String RetStr = "";System.out.println(SourceStr+"------------------"+SourceStr.length()); for (int i = 0; i <= SourceStr.length()-1; i=i+2) { int h = SourceStr.charAt(i) - 'a'; System.out.print(h); int l = SourceStr.charAt(i+1) - 'a'; System.out.print(l); char c = (char) ((h << 4) + (l & 0xf)); RetStr = RetStr + c; } System.out.println(""); return RetStr;}
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