maven项目如何使用durid数据库连接池

db.properties文件配置

db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/eloan?characterEncoding=utf-8&useSSL=false
db.username=root
db.password=admin
db.maxActive=20
db.initialSize=1
db.maxWait=60000
db.minIdle=1
db.poolPreparedStatements=true
db.maxPoolPreparedStatementPerConnectionSize=40

applicationContext.xml配置