一、开启ssl证书

1、msysql部署时默认开启ssl证书

可通过命令查看：

SHOW VARIABLES LIKE '%have_ssl%';  

查询结果如下：

2、配置文件

配置my.cnf文件：

vi my.cnf
[mysql]
ssl-ca = /opt/mysqldata/data/ca.pem
ssl-cert = /opt/mysqldata/data/client-cert.pem
ssl-key = /opt/mysqldata/data/client-key.pem
[mysqld]
require_secure_transport = ON
ssl-ca = /opt/mysqldata/data/ca.pem
ssl-cert = /opt/mysqldata/data/server-cert.pem
ssl-key = /opt/mysqldata/data/server-key.pem

文件说明：
ca.pem # 自签的CA证书，客户端连接也需要提供
client-cert.pem # 客户端连接服务器端需要提供的证书文件
client-key.pem # 客户端连接服务器端需要提供的私钥文件
server-cert.pem # 服务器端证书文件
server-key.pem # 服务器端私钥文件

3、创建用户并指定ssl

create user jk_dev@'%' identified with mysql_native_password by '密码';
alter user 'jk_dev'@'%' require ssl;
grant all privileges on *.* to 'jk_dev'@'%';
flush privileges;

二、添加Java信任库

1、使用 keytool 导入证书

运行以下命令将 CA 证书导入到 Java 信任库：

keytool -import -alias mysql_ca -file /opt/mysqldata/data/ca.pem -keystore $JAVA_HOME/jre/lib/security/cacerts

执行时需要输入信任库密码（默认为changeit）。

2、验证证书是否已导入

运行以下命令验证是否已导入：

keytool -list -alias mysql_ca -keystore $JAVA_HOME/jre/lib/security/cacerts

如果证书未导入，Java无法将 MySQL 服务器提供的证书链追溯到它信任的根证书，连接时会报错：

Caused by: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors
        at com.mysql.cj.protocol.ExportControlled$X509TrustManagerWrapper.checkServerTrusted(ExportControlled.java:379)
        at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:1255)
        at sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:630)
        ... 81 common frames omitted
Caused by: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors
        at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:159)
        at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:85)
        at java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)
        at com.mysql.cj.protocol.ExportControlled$X509TrustManagerWrapper.checkServerTrusted(ExportControlled.java:373)
        ... 83 common frames omitted

三、修改连接配置

修改配置文件，数据库连接指向client-key.pem和client-cert.pem：

spring.datasource.url=jdbc:mysql://xxxx:3306/jkfunds_dev?useSSL=true&requireSSL=true&verifyServerCertificate=true&clientCertificateKeyFile=file:/opt/mysqldata/data/client-key.pem&clientCertificateFile=file:/opt/mysqldata/data/client-cert.pem&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&autoReconnect=true&serverTimezone=Asia/Shanghai