老师 请问我一运行就提示Sat Jul 10 19:43:21 CST 2021 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.是什么情况
WARN:不建议在没有服务器身份验证的情况下建立SSL连接。 MySQL 5.5.45+、5.6.26+和5.7.6+要求如果没有设置显式选项，则默认需要建立SSL连接。 为了符合未使用SSL的现有应用程序，verifyServerCertificate属性被设置为“false”。 您需要通过设置useSSL=false显式禁用SSL，或者设置useSSL=true并为服务器证书验证提供信任库。
package jdbcdemo;
import java.lang.instrument.ClassFileTransformer;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBCtest {
//向department表中添加一条数据
public void insertDepartments(String dep_name,int location_id) {
Connection conn=null;
Statement statement=null;
//驱动注册
try {
Class.forName("com.mysql.jdbc.Driver");
//创建连接
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/bjsxt?useUnicode=true&characterEncoding=utf-8", "root", "qwe555123");
String sql="insert into dep values(default，'"+dep_name+"',"+location_id+")";
statement=conn.createStatement();
int flag=statement.executeUpdate(sql);
System.out.println(flag);
} catch (Exception e) {
// TODO: handle exception
}
finally {
if (statement!=null) {
try {
statement.cancel();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (conn!=null) {
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
JDBCtest text=new JDBCtest();
text.insertDepartments("研发部", 8);
}
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