Java persistence.xml如何从db.properties文件获取数据库参数

我想将.properties文件中的值导入persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.2" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd">
<persistence-unit name="zoo" transaction-type="RESOURCE_LOCAL">
    <properties>
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306"/>
        <property name="javax.persistence.jdbc.user" value="root"/>
        <property name="javax.persistence.jdbc.password" value=""/>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.cj.jdbc.Driver"/>
        <property name="hibernate.id.new_generator_mappings" value="false"/>            
        <property name="hibernate.show_sql" value="false"/>
    </properties>
</persistence-unit>

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您不能以这种方式将属性添加到持久性文件中，但是您可能会遵循程序路线，但尝试起来可能更复杂，请检查此项

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306
login=root
pswd=