数据库配置文件加密

  数据库加密，查了好多资料，开始都没有解决，朋友spring mvc 都可以使用，但是我这么项目还是没有做出来；最后还是我旁边的波波大神做出来了。

方法一  springmvc通过的，其他的自己测：

<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="messages" />
<property name="useCodeAsDefaultMessage" value="true" />
</bean>

<bean class="com.ott.Utils.ConvertPwdPropertyConfigurer"
p:location="classpath:jdbc.properties"
p:fileEncoding="utf-8"
/>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close"
p:driverClassName="${driverClassName}"
p:url="${url}"
p:username="${username}"
p:password="${password}" />

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

public class ConvertPwdPropertyConfigurer extends PropertyPlaceholderConfigurer{
private String[] encryptPropNames = {"driverClassName","url","username", "password"};

@Override
protected String convertProperty(String propertyName, String propertyValue)
{

//如果在加密属性名单中发现该属性
if (isEncryptProp(propertyName))
{
String decryptValue = DESUtil.getDecryptString(propertyValue);
System.out.println(decryptValue);
return decryptValue;
}else {
return propertyValue;
}

}

private boolean isEncryptProp(String propertyName)
{
for (String encryptName : encryptPropNames)
{
if (encryptName.equals(propertyName))
{
return true;
}
}
return false;
}
}

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 DESUtil {
private static Key key;
private static String KEY_STR="mykey";

static{
try
{
KeyGenerator generator = KeyGenerator.getInstance("DES");
SecureRandom secureRandom=SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(KEY_STR.getBytes());
generator.init(secureRandom);
key = generator.generateKey();
generator=null;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}

/**
* 对字符串进行加密，返回BASE64的加密字符串
* <功能详细描述>
* @param str
* @return
* @see [类、类#方法、类#成员]
*/
public static String getEncryptString(String str){
BASE64Encoder base64Encoder = new BASE64Encoder();
System.out.println(key);
try
{
byte[] strBytes = str.getBytes("UTF-8");
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptStrBytes = cipher.doFinal(strBytes);
return base64Encoder.encode(encryptStrBytes);
}
catch (Exception e)
{
throw new RuntimeException(e);
}

}

/**
* 对BASE64加密字符串进行解密
* <功能详细描述>
* @param str
* @return
* @see [类、类#方法、类#成员]
*/
public static String getDecryptString(String str){
BASE64Decoder base64Decoder = new BASE64Decoder();
try
{
byte[] strBytes = base64Decoder.decodeBuffer(str);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] encryptStrBytes = cipher.doFinal(strBytes);
return new String(encryptStrBytes,"UTF-8");
}
catch (Exception e)
{
throw new RuntimeException(e);
}

}

方法二：spring项目通过的

<!-- 定义受环境影响易变的变量 -->
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
<property name="ignoreResourceNotFound" value="true" />
<property name="locations">
<list>
<!-- 标准配置 -->
<value>classpath*:/application.properties</value>
<!-- 集群中节点配置 -->
<value>classpath*:/application.cluster.properties</value>
<!-- 本地开发环境配置 -->
<value>classpath*:/application.local.properties</value>
<!-- 服务器生产环境配置 -->
<value>classpath*:/application.server.properties</value>
</list>
</property>
</bean>

<!-- 使用annotation 自动注册bean,并保证@Required,@Autowired的属性被注入 -->
<context:component-scan base-package="net.hehang" />

<!-- 数据源配置,使用应用内的DBCP数据库连接池 -->
<bean id="dataSource" class="net.hehang.service.utlile.Test"
destroy-method="close">
<!-- Connection Info -->
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />

<!-- Connection Pooling Info -->
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="maxIdle" value="30" />
<property name="maxWait" value="500" />
<property name="poolPreparedStatements" value="false" />
<property name="defaultAutoCommit" value="false" />
</bean>


import java.lang.reflect.Method;

public class Test extends org.apache.commons.dbcp.BasicDataSource{

public static void main(String[] args) {
/**
* 遍历父类方法
*/
for(Method method:new Test().getClass().getMethods())
{
System.out.println(method);
}

}
/**
* 重写父类 setPassword（）
*/
@Override
public synchronized void setPassword(String password) {

String dePassword=DESUtil.getDecryptString(password);//将密文password解密成明文password

super.setPassword(dePassword);//解密之后调用父类的setPassword();因为父类放中调用了一个私有变量，重写的方法不能完全代替父类方法
}
/**
* 重写父类 setUrl（）
*/
@Override
public synchronized void setUrl(String url)
{

String deUrl=DESUtil.getDecryptString(url);//将密文Url解密成明文Url
super.setUrl(deUrl);
}
/**
* 重写父类 setUsername（）
*/
@Override
public synchronized void setUsername(String username)
{
String deUsername=DESUtil.getDecryptString(username);//将密文Username解密成明文Username
super.setUsername(deUsername);
}

}