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Spring數(shù)據(jù)源及配置文件數(shù)據(jù)加密實現(xiàn)過程詳解

更新時間：2020年05月11日 10:37:08 作者：曾經(jīng)那個少年

這篇文章主要介紹了Spring數(shù)據(jù)源及配置文件數(shù)據(jù)加密實現(xiàn)過程詳解,文中通過示例代碼介紹的非常詳細，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值,需要的朋友可以參考下

The following example shows the corresponding XML configuration:

<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"/>

Spring在第三方依賴包中包含了兩個數(shù)據(jù)源的實現(xiàn)類包,其一是:Apache的DBCP;其二是C3P0,可以在Spring配置文件中利用二者的任何一個配置數(shù)據(jù)源.

The next two examples show the basic connectivity and configuration for DBCP and C3P0. To learn about more options that help control the pooling features, see the product documentation for the respective connection pooling implementations.

The following example shows DBCP configuration:

<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"/>

The following example shows C3P0 configuration:

<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"/>

在jdbc.properties文件中定義屬性的值,如下:

jdbc.driverClassName=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3309/sampledb

jdbc.username=root

jdbc.password=123456

但是這些屬性是以明文形式存放,那么任何擁有服務(wù)器登錄權(quán)限的人都可以查看這些機密信息,容易造成數(shù)據(jù)庫訪問權(quán)限的泄露.

這就要求對應(yīng)用程序配置文件對某些屬性進行加密,讓Spring容器在讀取屬性文件后,在內(nèi)存中對屬性進行解密,然后再將解密后的屬性賦給目標(biāo)對象.

這里提供一個加密解密工具(DES對稱加密解密)代碼:

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加密解密所用的密鑰
  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("請輸入要加密的字符,用空格分隔.");
    }else {
      for(String arg : args) {
        System.out.println(arg + ":" + getEncryptString(arg));
      }
    }
  }
}

針對配置文件中加密信息的解密

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配置文件內(nèi)容

<?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>

通過在控制臺運行我們的加密代碼獲取加密后的密文

yusuwudeMacBook-Pro:classes yusuwu$ java com.springboot.utils.DESUtils root 123

獲取密文: