import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class EncryptDecrypt {
/**
* 加密
*/
public static String Encrypt(String pass) {
int len = pass.length();
char enPass[] = new char[len * 2];
int chk[] = { 104, 115, 109, 97, 122, 104, 106, 104 };
if (pass == null || pass.equals(“”))
return “”;
int i = 0;
for (int j = 0; i < len; j++) {
if (j == 8) {
j = 0;
}
int temp = pass.charAt(i) ^ chk[j];
String C = Integer.toString(temp, 16);
if (C.length() > 1) {
enPass[i * 2] = C.charAt(0);
enPass[i * 2 + 1] = C.charAt(1);
} else {
enPass[i * 2] = ‘0’;
enPass[i * 2 + 1] = C.charAt(0);
}
i++;
}

	return new String(enPass);
}/*** 解密*/
public static String unEncrypt(String enPass) {int len = enPass.length();if (len % 2 != 0) {return "";}if (enPass == null || enPass.equals(""))return "";char pass[] = new char[len / 2];char C[] = new char[2];int chk[] = { 104, 115, 109, 97, 122, 104, 106, 104 };int i = 0;for (int j = 0; i < len / 2; j++) {if (j == 8) {j = 0;}C[0] = enPass.charAt(i * 2);C[1] = enPass.charAt(i * 2 + 1);int temp = Integer.parseInt(String.valueOf(C), 16);pass[i] = (char) (temp ^ chk[j]);i++;}return new String(pass);
}

public static void main(String args[]) {//unicode在线编码《请输入数据库密码(回车确认):         \u8BF7\u8F93\u5165\u6570\u636E\u5E93\u5BC6\u7801(\u56DE\u8F66\u786E\u8BA4):》System.out.println("\u8BF7\u8F93\u5165\u6570\u636E\u5E93\u5BC6\u7801(\u56DE\u8F66\u786E\u8BA4):");BufferedReader br = new BufferedReader(new InputStreamReader(System.in));try {String pwd = br.readLine();System.out.println("================\u56DE\u8F66\u79BB\u5F00");System.out.println("\u539F\u5BC6\u7801\uFF1A" + pwd);System.out.println("\u52A0\u5BC6\u5BC6\u7801\uFF1A" + Encrypt(pwd));System.out.println("\u52A0\u5BC6\u5BC6\u7801\uFF1A" + unEncrypt(Encrypt(pwd)));} catch (IOException e) {e.printStackTrace();}
}

}

运行结果如下：