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      <property name="initialPoolSize">5</property>
      <property name="minPoolSize">6</property>
      <property name="maxPoolSize">10</property>
 
      <property name="maxStatements">5</property>
      <property name="maxStatementsPerConnection">5</property>
     
      <property name="user">system</property>
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      <property name="jdbcUrl">jdbc:oracle:thin:@localhost:1521:itcast</property>
      <property name="driverClass">oracle.jdbc.driver.OracleDriver</property>
     
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import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
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