Encrypt.java

package com.qikemi.packages.encrypt.base64encrypt;

import java.security.*;

import javax.crypto.*;

import sun.misc.*;

/**
 * 使用base64位加密技术
 * 
 * @description 本程序用于来自谢先斌毕业论文，如有使用请联系作 者，注明出处。
 * @URL 代码地址：http://github.com/openRDF/rdf_fronts
 * @rdf com.openrdf.utils
 * @dateTime 2014-3-23
 * @author XieXianbin
 * @email a.b@hotmail.com
 *
 */

/**
 * 使用DES加密与解密,可对byte[],String类型进行加密与解密 密文可使用String,byte[]存储. 方法: void
 * getKey(String strKey)从strKey的字条生成一个Key String getEncString(String
 * strMing)对strMing进行加密,返回String密文 String getDesString(String
 * strMi)对strMin进行解密,返回String明文 byte[] getEncCode(byte[] byteS)byte[]型的加密 byte[]
 * byte[] getDesCode(byte[] byteD)byte[]型的解密
 * 
 * 
 * 导入sun.misc.BASE64Encoder jar包步骤: 右键项目 -->Properties -->Java Bulid Path->
 * Libraries -->JRE System Library -->Access rules -->双击Type Access
 * Rules在Accessible中添加accessible， 下面填上** 点击确定。
 * 
 */
public class Encrypt {
	private Key key;
	private byte[] byteMi = null;
	private byte[] byteMing = null;
	private String strMi = "";
	private String strM = "";

	// 根据参数生成KEY
	public void setKey(String strKey) {
		try {
			KeyGenerator _generator = KeyGenerator.getInstance("DES");
			_generator.init(new SecureRandom(strKey.getBytes()));
			this.key = _generator.generateKey();
			_generator = null;
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	// 加密String明文输入,String密文输出
	@SuppressWarnings("restriction")
	public void setEncString(String strMing) {
		BASE64Encoder base64en = new BASE64Encoder();
		try {
			this.byteMing = strMing.getBytes("UTF8");
			this.byteMi = this.getEncCode(this.byteMing);
			this.strMi = base64en.encode(this.byteMi);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			this.byteMing = null;
			this.byteMi = null;
		}
	}

	// 加密:以byte[]明文输入,byte[]密文输出
	private byte[] getEncCode(byte[] byteS) {
		byte[] byteFina = null;
		Cipher cipher;
		try {
			cipher = Cipher.getInstance("DES");
			cipher.init(Cipher.ENCRYPT_MODE, key);
			byteFina = cipher.doFinal(byteS);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			cipher = null;
		}

		return byteFina;
	}

	// 解密:以String密文输入,String明文输出
	@SuppressWarnings("restriction")
	public void setDesString(String strMi) {
		BASE64Decoder base64De = new BASE64Decoder();
		try {
			this.byteMi = base64De.decodeBuffer(strMi);
			this.byteMing = this.getDesCode(byteMi);
			this.strM = new String(byteMing, "UTF8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			base64De = null;
			byteMing = null;
			byteMi = null;
		}

	}

	// 解密:以byte[]密文输入,以byte[]明文输出
	private byte[] getDesCode(byte[] byteD) {
		Cipher cipher;
		byte[] byteFina = null;
		try {
			cipher = Cipher.getInstance("DES");
			cipher.init(Cipher.DECRYPT_MODE, key);
			byteFina = cipher.doFinal(byteD);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			cipher = null;
		}
		return byteFina;
	}

	// 返回加密后的密文strMi
	public String getEncString() {
		return strMi;
	}

	// 返回解密后的明文
	public String getDesString() {
		return strM;
	}
}