?? linkdb.java
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package guestbook;import javax.sql.DataSource;import java.sql.*;import org.apache.commons.dbcp.BasicDataSource;public class LinkDB {private static DataSource dataSource = null;private static DataSource startupDataSource(String DriverName,String URL,String username,String password) { BasicDataSource ds = new BasicDataSource(); ds.setDriverClassName(DriverName); ds.setUsername(username); ds.setPassword(password); ds.setUrl(URL); ds.setMaxActive(100); ds.setMaxIdle(30); ds.setMaxWait(10000); return ds;}public static void setDB(String DriverName,String URL,String username,String password){ dataSource=startupDataSource(DriverName,URL,username,password);}public static DataSource getDB(){ return dataSource;}public static void shutdownDataSource(DataSource ds)throws SQLException { BasicDataSource bds = (BasicDataSource)ds; bds.close();}}
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