package com.fgkj.db;
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import java.sql.Connection;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.ArrayList;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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public class DBUtil {
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private static ComboPooledDataSource mysql_ds = new ComboPooledDataSource();
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private static String classDriver="com.mysql.jdbc.Driver";
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//private static String burl="jdbc:mysql://192.168.0.34:5306/";
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//private static String username="website";
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//private static String password="amtb3737";
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private static String username="root";
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private static String password="lmx8688139";
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// private static String url="jdbc:mysql://118.89.139.230:3360/db_user";
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// private static String url="jdbc:mysql://192.168.43.242:3360/db_user";
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// private static String url="jdbc:mysql://123.207.82.239:3360/db_user";
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// private static String url="jdbc:mysql://192.168.10.150:3360/db_user";
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// private static String url="jdbc:mysql://192.168.10.221:3360/db_user";
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// private static String url="jdbc:mysql://192.168.10.139:3360/db_user";
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private static String url="jdbc:mysql://192.168.10.221:3360/db_user";
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// private static String url="jdbc:mysql://127.0.0.1:3360/db_user";
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// private static String url="jdbc:mysql://192.168.2.88:3360/db_user";
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/*private static String username="root";
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private static String password="123456";*/
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private static int conncount_max = 500;
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private static int conncount_min=2;
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private static int MaxStatements = 0;
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private static int MaxIdleTime=60;
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private static int InitialPoolSize=2;
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static{
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try {
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//Thread.sleep(1000*60);
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mysql_ds.setDriverClass(classDriver);
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mysql_ds.setUser(username);
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mysql_ds.setPassword(password);
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mysql_ds.setMaxPoolSize(conncount_max);
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mysql_ds.setMinPoolSize(conncount_min);
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//mysql_ds.setIdleConnectionTestPeriod(60);
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mysql_ds.setJdbcUrl(url);
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// 设置连接池中的最大Statements数量！
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mysql_ds.setMaxStatements(MaxStatements);
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// 设置连接池的最大空闲时间！
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mysql_ds.setMaxIdleTime(MaxIdleTime);
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// 设置初始连接池的大小！
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mysql_ds.setInitialPoolSize(InitialPoolSize);
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mysql_ds.setIdleConnectionTestPeriod(60);
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//mysql_ds.setPreferredTestQuery("SELECT 1");
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//mysql_ds.setIdleConnectionTestPeriod(1800);
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//mysql_ds.setMaxIdleTime(25000);
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//mysql_ds.setAcquireRetryDelay(100);
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//mysql_ds.setBreakAfterAcquireFailure(false);
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//当连接池用完时客户端调用getConnection()后等待获取新连接的时间，超时后将抛出SQLException，如设为0则无限期等待。单位毫秒，默认为0
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//mysql_ds.setCheckoutTimeout(10000);
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//因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的
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//时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable
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//等方法来提升连接测试的性能。Default: false
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//mysql_ds.setTestConnectionOnCheckin(false);
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//如果设置为true,每次从池中取一个连接，将做一下测试，使用automaticTestTable 或者 preferredTestQuery,做一条查询语句.看看连接好不好用，不好用，就关闭它，重新从池中拿一个.
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//mysql_ds.setTestConnectionOnCheckout(true);
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/*ArrayList view_list=new ArrayList();
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view_list.add(DaoView.db_alarm_view_baoji);//创建包机组视图
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try {
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DAOHelper.makeManualCommit(DBUtil.getConn(), view_list);
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} catch (Exception e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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System.out.println("创建触发器/视图报错!");
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}*/
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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public static Connection getConn(){
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/*//System.out.println(DBUtil.getUrl());
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Connection conn=null;
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try {
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Class.forName(classDriver);
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conn=DriverManager.getConnection(url+databaseName, username, password);
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} catch (ClassNotFoundException e) {
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e.printStackTrace();
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} catch (SQLException e) {
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}*/
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Connection conn = null;
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try {
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conn = mysql_ds.getConnection();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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return conn;
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}
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//获取当前连接数
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public static void getConnections(){
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try {
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//System.out.println("最大连接数: "+mysql_ds.getMaxPoolSize());// 最大连接数
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//System.out.println("最小连接数: "+mysql_ds.getMinPoolSize());// 最小连接数
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System.out.println("正在使用连接数: "+mysql_ds.getNumBusyConnections());// 正在使用连接数
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System.out.println("空闲连接数: "+mysql_ds.getNumIdleConnections());// 空闲连接数
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//System.out.println("总连接数: "+mysql_ds.getNumConnections());// 总连接数
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} catch (SQLException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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//设置IP地址
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public static void setUrl(String ip) {
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DBUtil.url = "jdbc:mysql://"+ip+":5306";
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//System.out.println(DBUtil.url);
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}
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public static String getUrl() {
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return url;
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}
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//关闭资源
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public static void close(ResultSet rs,Statement stat,Connection conn){
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try {
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if(rs != null)
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rs.close();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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try {
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if(stat != null)
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stat.close();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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try {
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if(conn != null){
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conn.close();
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}
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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/**
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* 初始化连接池
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*/
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public static void initPool(){
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close(null, null, getConn());
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}
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public static void main(String[] args){
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//System.out.println("start...");
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//System.out.println(getConn());
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//System.out.println("end...");
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Connection conn=DBUtil.getConn();
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DBUtil.getConnections();
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DBUtil.close(null, null, conn);
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while(true){
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DBUtil.getConnections();
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try {
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Thread.sleep(1000);
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} catch (InterruptedException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
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}
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