JDBC远程从一个MySql数据库中的一张表里面读出数据（这个数据库需要用SSH隧道连接

  http://www.cnblogs.com/I-will-be-different/p/3925351.html

package com.eeepay.lzj.db;

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

import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;


public class ChangeDB {
  
  public static int lport = 33102;//本地端口（随便取）  
  public static String rhost = "172.***.***.***";//远程MySQL服务器  
  public static int rport = 3306;//远程MySQL服务端口
  
  
  public static void go() {
    String user = "***";//SSH连接用户名
    String password = "******";//SSH连接密码
    String host = "120.132.***.***";//SSH服务器
    int port = *****;//SSH访问端口
    try {
      JSch jsch = new JSch();
      Session session = jsch.getSession(user, host, port);
      session.setPassword(password);
      session.setConfig("StrictHostKeyChecking", "no");
      session.connect();
      System.out.println(session.getServerVersion());//这里打印SSH服务器版本信息
      int assinged_port = session.setPortForwardingL(lport, rhost, rport);
      System.out.println("localhost:" + assinged_port + " -> " + rhost + ":" + rport);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  
  
  
  public static void main(String[] args) {
    String mobileNo;//mobile_username
    String accountName;//account_name
    String accountNo;//account_no
    String cnaps;//cnaps_no
    String bankName;//bank_name
    
    String realName;//lawyer
    int status;//open_status
    String password;//mobile_password
    String idCard;//id_card_no
    int realNameAuth;//real_flag
    Date createTime;
    go();
    try {
      //1、加载驱动
      Class.forName("com.mysql.jdbc.Driver");
    } catch (ClassNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    //2、创建连接
    Connection conn = null;
    Connection conn2 = null;
     try {
      conn = DriverManager.getConnection("jdbc:mysql://localhost:33102/posp", "****", "***");
      conn2 = DriverManager.getConnection("jdbc:mysql://115.29.***.***:3306/bag", "****", "*****");
    } catch (SQLException e) {
      System.out.println("未连接上数据库");
      e.printStackTrace();
    }
    PreparedStatement pstmt = null;
    PreparedStatement pstmt2 = null;
    PreparedStatement pstmt22 = null;
    PreparedStatement pstmt3 = null;
    try {
      String sql = "select mobile_username,account_name,account_no,cnaps_no,bank_name,lawyer,open_status,mobile_password,id_card_no,real_flag,create_time from pos_merchant";
      //String sql = "select * from settle_account where id=1";
      String sql2 = "insert into bag_login(mobile_no,status,real_name,create_time,password,pay_password,idcard,real_name_auth) values(?,?,?,?,?,?,?,?)";
      String sql22 = "select * from bag_login where mobile_no=?";
      String sql3 = "insert into settle_account(mobile_no,account_name,account_no,cnaps,bank_name,create_time) values(?,?,?,?,?,?)";
      pstmt = conn.prepareStatement(sql);
      pstmt2 = conn2.prepareStatement(sql2);
      pstmt22 = conn2.prepareStatement(sql22);
      pstmt3 = conn2.prepareStatement(sql3);
      ResultSet rs = pstmt.executeQuery();
      int i=1;
      while(rs.next()){
        System.out.println(i++);
        createTime = rs.getDate("create_time");
        mobileNo = rs.getString("mobile_username");
        accountName = rs.getString("account_name");
        accountNo = rs.getString("account_no");
        cnaps = rs.getString("cnaps_no");
        bankName = rs.getString("bank_name");
        realName = rs.getString("lawyer");
        status = rs.getInt("open_status");
        password = rs.getString("mobile_password");
        idCard = rs.getString("id_card_no");
        realNameAuth = rs.getInt("real_flag");
        pstmt3.setString(1, mobileNo);
        pstmt3.setString(2, accountName);
        pstmt3.setString(3, accountNo);
        pstmt3.setString(4, cnaps);
        pstmt3.setString(5, bankName);
        pstmt3.setDate(6, createTime);
        pstmt3.execute();
        
        pstmt22.setString(1, mobileNo);
        if(!pstmt22.execute()){
          pstmt2.setString(1, mobileNo);
          pstmt2.setInt(2, status);
          pstmt2.setString(3, realName);
          pstmt2.setDate(4, createTime);
          pstmt2.setString(5, password);
          pstmt2.setString(6, password);
          pstmt2.setString(7, idCard);
          pstmt2.setInt(8, realNameAuth);
          pstmt2.execute();
        }
        
      }
       
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } finally{
       try {
          pstmt.close();
          conn.close();
          pstmt2.close();
          conn2.close();
          pstmt3.close();
           
        } catch (SQLException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
    }

  }

}