标签:throw catch nec tcl cat private statement ace pre
package cn.itcast.utils;
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;
/**
* @author newcityman
* @date 2019/8/16 - 23:56
* Druid 的工具类
*/
public class JDBCUtils {
// 1、定义成员变量DataSource
private static DataSource ds;
static {
try {
// 2、加载配置文件
Properties pro = new Properties();
pro.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
// 3、获取连接对象Datasource
ds = DruidDataSourceFactory.createDataSource(pro);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* 获取连接的方法
* */
public static Connection getConnetion() throws SQLException {
return ds.getConnection();
}
/*
* 释放资源
* */
public static void close(Statement stmt,Connection conn){
/* if(stmt!=null){
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn!=null){
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}*/
close(null,stmt,conn);
}
/*
* 释放资源
* */
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();
}
}
}
/*
* 获取连接池方法
* */
public static DataSource getDataSource(){
return ds;
}
}
标签:throw catch nec tcl cat private statement ace pre
原文地址:https://www.cnblogs.com/newcityboy/p/11366983.html