代码：

public class DruidEncryptUtils {private static String publicKey;private static  String privateKey;static {try {String[] keyPair= ConfigTools.genKeyPair(512);privateKey = keyPair[0];System.out.println("privateKey:"+privateKey);publicKey = keyPair[1];System.out.println("publicKey:"+publicKey);} catch (NoSuchAlgorithmException e) {} catch (NoSuchProviderException e) {throw new RuntimeException(e);}}/*** 加密* @param plainText* @return* @throws Exception*/public static String encrypt(String plainText) throws Exception {String encrypt = ConfigTools.encrypt(privateKey, plainText);System.out.println("encrypt:" + encrypt);return encrypt;}/*** 解密* @param plainText* @return* @throws Exception*/public static String decrypt(String plainText) throws Exception {String decrypt = ConfigTools.decrypt(publicKey, plainText);System.out.println("decrypt:" + decrypt);return decrypt;}public static void main(String[] args) throws Exception {//私钥加密数据库密码得到加密后的串String aaa = encrypt("数据库密码");System.out.println(aaa);}
}

流程：先用私钥加密数据库密码，得到加密后的串，这个串填到数据库的密码位置，开启druid的解密，用公钥去进行解密。

这里需要三个串：

1.生成的公钥

2.生成的私钥

3.用私钥对密码加密后的串

配置文件代码：

spring:datasource:username: root#私钥==》加密后的串，放这，通过公钥解密password: 加密后的串driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://ip:3306/jc-club?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=truetype: com.alibaba.druid.pool.DruidDataSourcedruid:#连接池初始化连接initial-size: 20#最小空闲数min-idle: 20#最大连接数max-active: 100#最大等待时间max-wait: 60000#解密，放到druid下面，别处解密不到connectionProperties: config.decrypt=true;config.decrypt.key=${publicKey}stat-view-servlet:enabled: trueurl-pattern: /druid/*login-username: adminlogin-password: 123456#慢sqlfilter:stat:enabled: trueslow-sql-millis: 2000log-slow-sql: true#防火墙：drop表危险操作拦截wall:enabled: true#开启后才会解密串config:enabled: true
#公钥
publicKey: 公钥串