依赖

        <!-- druid数据源驱动 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency> 

加密

新建个测试方法，加密下得到密文跟公钥。

import com.alibaba.druid.filter.config.ConfigTools;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest
public class DruidTest {

    @Test
    public void encrypt() throws Exception {
        //密码明文
        String password = "123456";
        System.out.println("明文密码: " + password);
        String[] keyPair = ConfigTools.genKeyPair(512);
        //私钥
        String privatekey = keyPair[0];
        //公钥
        String publickey = keyPair[1];

        //用私钥加密后的密文
        password = ConfigTools.encrypt(privatekey, password);

        System.out.println("privatekey:" + privatekey);
        System.out.println("publickey:" + publickey);
        System.out.println("password:" + password);
        //用公钥解密
        String decryptPassword = ConfigTools.decrypt(publickey, password);
        System.out.println("decryptPassword:" + decryptPassword);
    }

}

得到私钥（privatekey ）、公钥（publickey ）、加密后的密码（password）如下：

明文密码: 123456
privatekey:MIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEAjmtKvCDGiybqxDWVvEkCeSifnSkvOcsEHZmBfac6noUMl8oOl1DwY4N66Yfalgs/0RGh2BWT5maYYgrLxy7+RwIDAQABAkEAh8NLqO7tlXTx0zzpkmVe0DSjg2PhOwyGzdipkii6PqVRBs8bzL74vGrp9j2SFq0NegdJVR5hgRO4JfEp8k/5cQIhAOMWIeMqvodDberoLfJ+I9+cU1s+rItWvPaDmiG31oktAiEAoI1u47C2rW2p1RJLA6MbOj+oC1QR8kvl4UMEWJVVJcMCIEHyM3Uc/KebVVhahL1fFFvjsfFVihYM4mNUZHZWRN8hAiEAleX21lay+BEfM3Q03Vx3m1a7ingfmV0Lb9mmQR6LtQkCIDx67fr+qHABDTVugYOEFqf7sdcIurE8wYelOGWLiFZM
publickey:MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAI5rSrwgxosm6sQ1lbxJAnkon50pLznLBB2ZgX2nOp6FDJfKDpdQ8GODeumH2pYLP9ERodgVk+ZmmGIKy8cu/kcCAwEAAQ==
password:Aw0LEdG1J0M4jtOdC7or7xSlsCclnmkMdJgQ+c9slXmny67Z9Y//xy1wlihsnkSLFx9XhFe7/pcPn6Lg09IdGw==
decryptPassword:123456

配置

spring:
  datasource:
    # 使用阿里的Druid连接池
    type: com.alibaba.druid.pool.DruidDataSource
    driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver
    # 填写你数据库的url、登录名、密码和数据库名
    druid:
      url: jdbc:sqlserver://127.0.0.1:1433;DatabaseName=test
      username: sa
      password: Aw0LEdG1J0M4jtOdC7or7xSlsCclnmkMdJgQ+c9slXmny67Z9Y//xy1wlihsnkSLFx9XhFe7/pcPn6Lg09IdGw==
      publickey: MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAI5rSrwgxosm6sQ1lbxJAnkon50pLznLBB2ZgX2nOp6FDJfKDpdQ8GODeumH2pYLP9ERodgVk+ZmmGIKy8cu/kcCAwEAAQ==
        # 这里有个坑
      connect-properties:
        config.decrypt: true
        config.decrypt.key: ${spring.datasource.druid.publickey}
      # 初始连接数
      initialSize: 10
      # 最大连接池数量
      maxActive: 50
      # 最小连接池数量
      minIdle: 10
      # 配置获取连接等待超时的时间
      maxWait: 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
      timeBetweenEvictionRunsMillis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      minEvictableIdleTimeMillis: 300000
      # 配置一个连接在池中最大生存的时间，单位是毫秒
      maxEvictableIdleTimeMillis: 900000
      # 配置检测连接是否有效
      validationQuery: SELECT 1
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      webStatFilter:
        enabled: true
      statViewServlet:
        enabled: true
        url-pattern: /monitor/druid/*
      filter:
        config:
          enabled: true
        stat:
          enabled: true
          log-slow-sql: true
          slow-sql-millis: 1000
          merge-sql: false
        wall:
          config:
            multi-statement-allow: true