Spring数据源及配置文件数据加密实现过程详解

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="${jdbc.driverClassName}"/>
  <property name="url" value="${jdbc.url}"/>
  <property name="username" value="${jdbc.username}"/>
  <property name="password" value="${jdbc.password}"/>
</bean>

<context:property-placeholder location="jdbc.properties"/>

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

<context:property-placeholder location="jdbc.properties"/>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
  <property name="driverClass" value="${jdbc.driverClassName}"/>
  <property name="jdbcUrl" value="${jdbc.url}"/>
  <property name="user" value="${jdbc.username}"/>
  <property name="password" value="${jdbc.password}"/>
</bean>

<context:property-placeholder location="jdbc.properties"/>

package com.springboot.utils;

import java.security.Key;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.Base64.Decoder;
import java.util.Base64.Encoder;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;


public class DESUtils {
  //指定DES加密解密所用的密钥
  private static Key key;
  private static String KEY_STR = "myKey";
  
  static {
    try {
      KeyGenerator generator = KeyGenerator.getInstance("DES");
      generator.init(new SecureRandom(KEY_STR.getBytes()));
      key = generator.generateKey();
      generator = null;
    }catch(Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getEncryptString(String str) {
    Encoder encoder = Base64.getEncoder();
    try {
      byte[] strBytes = str.getBytes("UTF8");
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.ENCRYPT_MODE, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return encoder.encodeToString(encryptStrBytes);
    }catch(Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getDecryptString(String str) {
    Decoder decoder = Base64.getDecoder();
    try {
      byte[] strBytes = decoder.decode(str);
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] decryptStrBytes = cipher.doFinal(strBytes);
      return new String(decryptStrBytes,"UTF8");
    }catch(Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static void main(String[] args) throws Exception{
    if(args == null || args.length < 1) {
      System.out.println("请输入要加密的字符,用空格分隔.");
    }else {
      for(String arg : args) {
        System.out.println(arg + ":" + getEncryptString(arg));
      }
    }
  }
}

package com.springboot.utils;

import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;

public class EncryptPropertyPlaceholderConfigurer extends PropertySourcesPlaceholderConfigurer{
  private String[] encryptPropNames = {"userName","password"};
  
  private boolean isEncryptProp(String propertyName) {
    for(String encryptProName : encryptPropNames) {
      if(encryptProName.equals(propertyName)) {
        return true;
      }
    }
    return false;
  }
  @Override
  protected String convertProperty(String propertyName, String propertyValue) {
    if(isEncryptProp(propertyName)) {
      String decryptVal = DESUtils.getDecryptString(propertyValue);
      System.out.println("decryptVal = " + decryptVal);
      return decryptVal;
    }else {
      return propertyValue;
    }
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:p="http://www.springframework.org/schema/p"
  xmlns:util="http://www.springframework.org/schema/util"
  xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="
    http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd
    http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd 
    http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">


   
   <bean class="com.springboot.utils.EncryptPropertyPlaceholderConfigurer"
     p:location="classpath:application.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}"/>
</beans>