Java. Lang. securityexception: sha1 digest error for COM/Sun/mail/SMTP/smtptransport. clas

An exception is thrown when you use javamail to send an email:
Java. Lang. securityexception: sha1 digest error for COM/Sun/mail/SMTP/smtptransport. Class
I am depressed for a long time, and finally found two problems 1. import all jar files in the project (this is not enough. It can be sent at this time, but an exception will always be reported. For the solution, refer to article 2. add all jar files to the Tomcat server {configure global path }. the details are as follows:
1. Find the server: 2. Find the paths item and click open.
3. Click Add JAR/zip in the append to calsspath item to import all jar files used by jmail.
4. OK. Now