package javacommon.util;import java.sql.Connection;import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;import java.sql.SQLException;
import java.sql.Statement;import com.ybb.DBConnection;
/*** * @author ybb* 连接Access数据库* java通过Access_JDBC30获取access数据库数据，取不到最新的数据*/
public class AccessDBUtil {private static  final String DRIVER="com.hxtt.sql.access.AccessDriver";private static final String URL="jdbc:Access:///G:/ceshi/ceshi.mdb";private static final String USER="";private static final String PASSWORD="";public static Connection getConnection(){try {Class.forName(DRIVER);} catch (ClassNotFoundException e) {e.printStackTrace();}try {Connection connection = DriverManager.getConnection(URL, USER, PASSWORD);return connection;} catch (SQLException e) {return null;}}public static void colseConnection(Connection conn){try {if(conn!=null&&!conn.isClosed()){conn.close();}} catch (Exception e) {e.printStackTrace();}}public static void myclose(Connection con,PreparedStatement ps){try {if (con!=null&&!con.isClosed()) {con.close();}if (ps!=null) {ps.close();}} catch (Exception e) {e.printStackTrace();}}public static void myclose(Connection con,PreparedStatement ps,ResultSet rs){try {if (con!=null&&!con.isClosed()) {con.close();}if (ps!=null) {ps.close();}if (rs!=null) {rs.close();}} catch (Exception e) {e.printStackTrace();}}/** * 测试 * */  public static void main(String[] args){  Connection connnect = null;while(true){try{  connnect = AccessDBUtil.getConnection();if(connnect!=null){  System.out.println(connnect+"\n连接成功");  }else{  System.out.println("连接失败");  }  Statement stat = connnect.createStatement();ResultSet rs = stat.executeQuery("select * from CYJ_PD_QTJL");if(rs!=null){  while(rs.next()){  System.out.println(rs.getString(1)+"\t"+rs.getString(2));    }  }  Thread.sleep(5000);}catch(Exception e){  e.printStackTrace();  }finally{  colseConnection(connnect);//关闭链接  }  }}  }

package com.ybb;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Properties;  /*** * @author ybb* 连接access数据 * 获取access数据库数据，可以取到最新的数据* 2019年4月16日 下午2:48:33*/
public class DBConnection { /** * 该方法用来连接数据库 * @param db:数据源名称 * */  public static Connection getDBConnection(){  try{  Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");//注册驱动  //Access中的数据库默认编码为GBK，本地项目为UTF-8，若不转码会出现乱码  Properties p = new Properties();  p.put("charSet", "GBK");  Connection connect= DriverManager.getConnection("jdbc:odbc:ceshi",p); return connect;}catch(Exception e){  e.printStackTrace();  return null;}  }  /** * 该方法用来执行SQL并返回结果集 * */  public static ResultSet selectQuery(String sql){  try{  PreparedStatement stmt = getDBConnection().prepareStatement(sql);  ResultSet rs = stmt.executeQuery();//执行SQL  return rs;  }catch(Exception e){  e.printStackTrace();  return null; }  }  /** * 测试 * */  public static void main(String[] args){  while(true){try{  Connection connnect = DBConnection.getDBConnection();  if(connnect!=null){  System.out.println(connnect+"\n连接成功");  }else{  System.out.println("连接失败");  }  ResultSet rs1 = selectQuery("select * from CYJ_PD_QTJL");  if(rs1!=null){  while(rs1.next()){  System.out.println(rs1.getString(1)+"\t"+rs1.getString(2));    }  }  Thread.sleep(5000);}catch(Exception e){  e.printStackTrace();  }finally{
//              closeConn();//关闭链接  }  }}
}