Jdbc druid数据库连接池

//测试类
package druid;

import util.JdbcUtilsDruid;

import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class druiddemo2 {
    public static void main(String[] args) {
        Connection connection = null;
        PreparedStatement preparedStatement = null;
        //1.获取连接
        try {
            connection = JdbcUtilsDruid.getConnection();
            String sql = "insert into stu values (?,?,?,?,?,?)";
            preparedStatement = connection.prepareStatement(sql);
            preparedStatement.setInt(1,6);
            preparedStatement.setString(2,"嘿嘿嘿");
            preparedStatement.setInt(3,44);
            preparedStatement.setDouble(4,88.8);
            preparedStatement.setDate(5, Date.valueOf("2018-01-01"));
            preparedStatement.setDate(6, Date.valueOf("2018-01-01"));

            int count = preparedStatement.executeUpdate();
            System.out.println(count);
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            JdbcUtilsDruid.close(preparedStatement,connection);
        }
    }
}

连接池工具

package util;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class JdbcUtilsDruid {
    private static DataSource ds;

    static {
        Properties pro = new Properties();
        try {
            pro.load(JdbcUtilsDruid.class.getClassLoader().getResourceAsStream("druid.properties"));
            ds = DruidDataSourceFactory.createDataSource(pro);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }

    public static void close(Statement stmt,Connection conn){
        close(null,stmt,conn);
    }


    public static void close(ResultSet rs,Statement stmt, Connection conn){
        if (rs != null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (stmt != null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (conn != null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    public static DataSource getDataSource(){
        return ds;
    }
}

配置文件

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql:///db2
username=root
password=
initialSize=5
maxActive=10
maxWait=3000