问题：The last packet sent successfully to the server was 0 milliseconds ago.
解决：出现错误的情况很多，我是因为没有关闭ssl
方法：
spring.datasource.url=jdbc:mysql://10.16.32.80:3306/testdb?useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
标签 "java" 下的文章
问题：java提供的sm2公钥无法在python中使用
解决：因为java和python使用的加密方法有差
方法：
package com.bocsoft.security;
import com.bocsoft.decrypt.Util;
import org.bouncycastle.asn1.*;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import static com.bocsoft.decrypt.Util.getHexString;
public class translate {
public static void main(String[] args) throws Exception {
String private_key = "308193020100301306072a8648ce3d020106082a811ccf5501822d0479307702010104205931b7fa3a8ec4e974d48e84b8a64d931c9e7bad295dafe57940573d46481c44a00a06082a811ccf5501822da14403420004798718d3c2152a61ef18ff58adfb83e6694f84ea6c58ce4cfa83f79bb7ff4893d5e6050242cca375a6585f265bd862b448c90af4c61d67620900526f3ebffcaf";
String public_key = "04251ed256cf8ac425443cc444cda5aafbe8aa22a5c5af1f11b2eecff6217bb3299e554c202f5253eee538ff1576bdba729e9a4d338508ba421b6c6330dca2711c";
byte[] sm2_private = privateKey(Util.hexStringToBytes(private_key));
System.out.println("私钥为："+ Util.encodeHexString(sm2_private));
byte[] publicKey = publicKey(Util.hexStringToBytes(public_key));
System.out.println("公钥为： " + Util.encodeHexString(publicKey));
}