It return ORA-01017: invalid username/password; logon denied when call java via plsql wrapper

I wrote a most simple java code which contains jdbc connection, then ran it IN JAVA COMMAND WINDDOW by OS user oracle which is the db admin user, it WORKED WELL.

Then, I create a PLSQL wrapper procedure for this java code and call this Plsql precode , It returned Ora-01017 error.

Could you please provide me some hint to get the root cause and resolve it? Any help will appreciated.

The steps:

1. The java code:

import java.sql.Connection;

import java.sql.DriverManager;

public class Test {

public static void main(String[] args){

Connection conn = null;

System.out.println("begin");

try {