Spring中管理数据源，加密和解密账号密码的方法

开始有一篇关于SSH框架上加密、解密读取properties上的文件，现使用另一种方式来实现

首先：工具类DESUtils

import java.security.Key;
import java.security.SecureRandom;
 
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
 
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
 
public class DESUtils {
 
    private static Key key;
    private static String KEY_STR = "myKey";// 密钥
    private static String CHARSETNAME = "UTF-8";// 编码
    private static String ALGORITHM = "DES";// 加密类型
 
    static {
        try {
            KeyGenerator generator = KeyGenerator.getInstance(ALGORITHM);
            generator.init(new SecureRandom(KEY_STR.getBytes()));
            key = generator.generateKey();
            generator = null;
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }
 
    /**
     * 对str进行DES加密
     * 
     * @param str
     * @return
     */
    public static String getEncryptString(String str) {
        BASE64Encoder base64encoder = new BASE64Encoder();
        try {
            byte[] bytes = str.getBytes(CHARSETNAME);
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return base64encoder.encode(doFinal);
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }
 
    /**
     * 对str进行DES解密
     * 
     * @param str
     * @return
     */
    public static String getDecryptString(String str) {
        BASE64Decoder base64decoder = new BASE64Decoder();
        try {
            byte[] bytes = base64decoder.decodeBuffer(str);
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return new String(doFinal, CHARSETNAME);
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }
 
}

工具类：EncryPtPropertyPlaceholderConfigurer

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
 
/**
 * 继承PropertyPlaceholderConfigurer定义支持密文版属性的属性配置器
 * 
 * @author moziqi
 * 
 */
public class EncryptPropertyPlaceholderConfigurer extends
        PropertyPlaceholderConfigurer {
    private String[] encryptPropNames = { "userName", "password" };
 
    @Override
    protected String convertProperty(String propertyName, String propertyValue) {
        if (isEncryptProp(propertyName)) {
            String decryptValue = DESUtils.getDecryptString(propertyValue);
            System.out.println(propertyName + "解密内容:" + decryptValue);
            return decryptValue;
        } else {
            return propertyValue;
        }
    }
 
    /**
     * 判断是否是加密的属性
     * 
     * @param propertyName
     * @return
     */
    private boolean isEncryptProp(String propertyName) {
        for (String encryptpropertyName : encryptPropNames) {
            if (encryptpropertyName.equals(propertyName))
                return true;
        }
        return false;
    }
}

测试的properties文件

dbName=sampledb
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/${dbName}
#userName=root
#password=123456
userName=WnplV/ietfQ=
password=QAHlVoUc49w=

spring中的数据源bean配置