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driver=com.mysql.jdbc.Driver url = jdbc:mysql://localhost:3306?useUnicode=true&characterEncoding=utf-8 username = root password = 123456

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://