标签:配置 获取 created tac res 加载 package static lang
package com.itheima.utils;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import javax.sql.DataSource;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
/*
数据库连接池的工具类
*/
public class DataSourceUtils {
//1.私有构造方法
private DataSourceUtils(){}
//2.声明数据源变量
private static DataSource dataSource;
//3.提供静态代码块,完成配置文件的加载和获取数据库连接池对象
static{
try{
//完成配置文件的加载
InputStream is = DataSourceUtils.class.getClassLoader().getResourceAsStream("druid.properties");
Properties prop = new Properties();
prop.load(is);
//获取数据库连接池对象
dataSource = DruidDataSourceFactory.createDataSource(prop);
} catch (Exception e) {
e.printStackTrace();
}
}
//4.提供一个获取数据库连接的方法
public static Connection getConnection() {
Connection con = null;
try {
con = dataSource.getConnection();
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
//5.提供一个获取数据库连接池对象的方法
public static DataSource getDataSource() {
return dataSource;
}
//6.释放资源
public static void close(Connection con, Statement stat, ResultSet rs) {
if(con != null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(stat != null) {
try {
stat.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close(Connection con, Statement stat) {
if(con != null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(stat != null) {
try {
stat.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
JDBC - 工具类 - 数据库连接池DataSourceUtils
标签:配置 获取 created tac res 加载 package static lang
原文地址:https://www.cnblogs.com/60kmph/p/14040472.html