eclipse6.5生存注册码

public class MyEclipseGen {

	private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";



	public String getSerial(String userId, String licenseNum) {

		java.util.Calendar cal = java.util.Calendar.getInstance();

		cal.add(1, 3);

		cal.add(6, -1);

		java.text.NumberFormat nf = new java.text.DecimalFormat("000");

		licenseNum = nf.format(Integer.valueOf(licenseNum));

		String verTime = new StringBuilder("-")

				.append(new java.text.SimpleDateFormat("yyMMdd").format(cal

						.getTime())).append("0").toString();

		String type = "YE3MP-";

		String need = new StringBuilder(userId.substring(0, 1)).append(type)

				.append("300").append(licenseNum).append(verTime).toString();

		String dx = new StringBuilder(need).append(LL).append(userId)

				.toString();

		int suf = this.decode(dx);

		String code = new StringBuilder(need).append(String.valueOf(suf))

				.toString();

		return this.change(code);

	}



	private int decode(String s) {

		int i;

		char[] ac;

		int j;

		int k;

		i = 0;

		ac = s.toCharArray();

		j = 0;

		k = ac.length;

		while (j < k) {

			i = (31 * i) + ac[j];

			j++;

		}

		return Math.abs(i);

	}



	private String change(String s) {

		byte[] abyte0;

		char[] ac;

		int i;

		int k;

		int j;

		abyte0 = s.getBytes();

		ac = new char[s.length()];

		i = 0;

		k = abyte0.length;

		while (i < k) {

			j = abyte0[i];

			if ((j >= 48) && (j <= 57)) {

				j = (((j - 48) + 5) % 10) + 48;

			} else if ((j >= 65) && (j <= 90)) {

				j = (((j - 65) + 13) % 26) + 65;

			} else if ((j >= 97) && (j <= 122)) {

				j = (((j - 97) + 13) % 26) + 97;

			}

			ac[i] = (char) j;

			i++;

		}

		return String.valueOf(ac);

	}



	public MyEclipseGen() {

		super();

	}



	public static void main(String[] args) {

		String username = "zs";

		MyEclipseGen myeclipsegen = new MyEclipseGen(); 

		String res = myeclipsegen.getSerial( username , "5") ; 

		System.out.println("username=" + username + "\nSerial:" + res);



	}

}