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SpringBoot 集成 Druid 配置及数据库密码加密

news 来源：原创 2024/5/10 17:03:51

在项目中，访问数据库是非常必要的，因此我们需要在配置文件中配置数据库路径，账号，密码等。这时领导往往会告诉我们，数据库密码不能是明文，哪怕是在项目配置文件里，因此我们对配置文件里的密码进行加密是非常有必要的

基础配置

基础配置就不多介绍了，采用的是 yml 配置，上面有注释
PS：这里要说下，加密采用的是 Druid 内置的非对称加密方式，因此这里的数据库密码是加密过的，下面需要 publicKey 公钥用于解密
官方参数文档，如果有需要别的参数，可以参考：官方配置属性

spring:
  datasource:
    url: xxxxxx # url
    username: xxxxxx # 用户名
    password: xxxxxx # 私钥加密过的密码
    publicKey: xxxxxx #公钥
  #Druid 连接池通用配置
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      # 下面为连接池的补充设置，应用到上面所有数据源中
      # 初始化大小，最小，最大
      initial-size: 5
      min-idle: 5
      max-active: 20
      # 配置获取连接等待超时的时间
      max-wait: 60000
      # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
      time-between-eviction-runs-millis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 300000
      # sql 校验
      validation-query: select count(1) from sys.objects Where type='U' And type_desc='USER_TABLE'
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      # 打开PSCache，并且指定每个连接上PSCache的大小
      pool-prepared-statements: true
      #   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
      max-pool-prepared-statement-per-connection-size: 20
      filters: stat # wall 若开启 wall，会把 if 中的 and 判断为注入进行拦截
      use-global-data-source-stat: true
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

Druid 配置文件

我们需要通过这个配置文件对密码进行个解密，然后再连接数据库
加依赖，通过这个依赖，才能通过配置文件对对象中的值进行注入

<!-- 配置文件处理器 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
</dependency>
<!-- Druid 依赖 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.9</version>
</dependency>

DruidDatsSourceConfig.java：

import com.alibaba.druid.filter.config.ConfigTools;
import com.alibaba.druid.pool.DruidDataSource;
import lombok.Data;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Properties;

/**
 * Druid
 * @author: author
 * @create: 2019-07-01 11:10
 **/
@Configuration
@ConfigurationProperties(prefix = "spring.datasource")
@Data
public class DruidDatsSourceConfig {

    private Logger logger = LoggerFactory.getLogger(DruidDatsSourceConfig.class);

    @Value("${spring.datasource.url}")
    private String url;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.type}")
    private String type;

    @Value("${spring.datasource.publicKey}")
    private String publicKey;

    @Value("${spring.datasource.druid.initial-size}")
    private Integer initialSize;

    @Value("${spring.datasource.druid.min-idle}")
    private Integer minIdle;

    @Value("${spring.datasource.druid.max-active}")
    private Integer maxActive;

    @Value("${spring.datasource.druid.max-wait}")
    private Integer maxWait;

    @Value("${spring.datasource.druid.time-between-eviction-runs-millis}")
    private Integer timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.druid.min-evictable-idle-time-millis}")
    private Integer minEvictableIdleTimeMillis;

    @Value("${spring.datasource.druid.validation-query}")
    private String validationQuery;

    @Value("${spring.datasource.druid.test-while-idle}")
    private Boolean testWhileIdle;

    @Value("${spring.datasource.druid.test-on-borrow}")
    private Boolean testOnBorrow;

    @Value("${spring.datasource.druid.test-on-return}")
    private Boolean testOnReturn;

    @Value("${spring.datasource.druid.pool-prepared-statements}")
    private Boolean poolPreparedStatements;

    @Value("${spring.datasource.druid.max-pool-prepared-statement-per-connection-size}")
    private Integer maxPoolPreparedStatementPerConnectionSize;

    @Value("${spring.datasource.druid.filters}")
    private String filters;

    @Value("${spring.datasource.druid.use-global-data-source-stat}")
    private Boolean useGlobalDataSourceStat;

    @Value("${spring.datasource.druid.connect-properties}")
    private Properties connectProperties;

    /**
     * 数据库参数注入
     * @return
     * @throws Exception
     */
    @Bean
    @Primary
    public DataSource druidDataSource() throws Exception {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(url);
        datasource.setUsername(username);
        // 解密后，再 set 进对象
        datasource.setPassword(ConfigTools.decrypt(publicKey, password));
        logger.info("密码：" + ConfigTools.decrypt(publicKey, password));
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        datasource.setUseGlobalDataSourceStat(useGlobalDataSourceStat);
        datasource.setConnectProperties(connectProperties);

        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("========druid configuration initialization filter========", e);
        }
        return datasource;
    }

    /**
     * 生成公私钥以及加密密码
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        String password = "xxxx";
        String[] arr = ConfigTools.genKeyPair(512);
        System.out.println("password:" + password);
        System.out.println("privateKey:" + arr[0]);
        System.out.println("publicKey:" + arr[1]);
        System.out.println("password:" + ConfigTools.encrypt(arr[0], password));
    }
}