jdbc 连接各种数据库

 package com.fh.controller.ruitai.util;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;

 //连接瑞泰餐饮前台数据库
 public class DBConnectSS {

     private static String dbURL = "192.168.186.128";
     private static String databaseName = "ssycyv8";
     private static String dbUser = "sa";
     private static String dbPassword = "88888888";

     public static Connection getConnectionForSS() {
         Connection conn = null;
         try {
             String url = "jdbc:sqlserver://" + dbURL + ";databaseName="
                     + databaseName + ";user=" + dbUser + ";password="
                     + dbPassword;// sa身份连接
             // Establish the connection.
             Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
             conn = DriverManager.getConnection(url, dbUser, dbPassword);
         } catch (ClassNotFoundException | SQLException e) {
             e.printStackTrace();
         }
         return conn;
     }

     public static Connection getConnectionForSS(String dbURL,String databaseName,String dbUser,String dbPassword) {
         Connection conn = null;
         try {

             String url = "jdbc:sqlserver://" + dbURL + ";databaseName="
                     + databaseName + ";user=" + dbUser + ";password="
                     + dbPassword;// sa身份连接
             // Establish the connection.
             Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
             conn = DriverManager.getConnection(url, dbUser, dbPassword);
         } catch (ClassNotFoundException | SQLException e) {
             e.printStackTrace();
         }
         return conn;
     }

     /**
      * @param dbtype    数据库类型
      * @param username    用户名
      * @param password    密码
      * @param dburl        数据库连接地址:端口
      * @param databaseName 数据库名
      * @return
      * @throws SQLException
      * @throws ClassNotFoundException
      */
     public static Connection getCon(String dbtype,String username,String password,String dburl,String databaseName) throws SQLException, ClassNotFoundException{
         System.out.print("数据库连接地址:"+"jdbc:sqlserver://"+dburl+"; DatabaseName="+databaseName+username+ password);
         if("mysql".equals(dbtype)){
             Class.forName("com.mysql.jdbc.Driver");
             return DriverManager.getConnection("jdbc:mysql://"+dburl+"/"+databaseName+"?user="+username+"&password="+password);
         }else if("oracle".equals(dbtype)){
             Class.forName("oracle.jdbc.driver.OracleDriver");
             return DriverManager.getConnection("jdbc:oracle:thin:@"+dburl+":"+databaseName, username, password);
         }else if("sqlserver".equals(dbtype)){
             Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
             return DriverManager.getConnection("jdbc:sqlserver://"+dburl+"; DatabaseName="+databaseName, username, password);
         }else{
             return null;
         }
     }

     /**
      * @description 关闭数据库的所有连接
      * @param con
      * @param stmt
      * @param rs
      */
     public static void closeAll(Connection con, Statement stmt, ResultSet rs) {
         if (rs != null)
             try {
                 rs.close();
             } catch (Exception e) {
             }
         if (stmt != null)
             try {
                 stmt.close();
             } catch (Exception e) {
             }
         if (con != null)
             try {
                 con.close();
             } catch (Exception e) {
             }
     }

     // 测试
     public static void main(String[] args) {
         // Declare the JDBC objects.
         Connection con = null;
         Statement stmt = null;
         ResultSet rs = null;
         try {
             con = getConnectionForSS();
             String SQL = SqlConst.getOders("",null);
             System.out.println(SQL);
             stmt = con.createStatement();
             rs = stmt.executeQuery(SQL);
             int i = 1;
             while (rs.next()) {
                 i = i + 1;
                 System.out.println("个数:" + i);
                 System.out.println(rs.getString(1) + " " + rs.getString(2));
             }

         } catch (Exception e) {
             e.printStackTrace();
         } finally {
             closeAll(con, stmt, rs);
         }
     }

     public static String getDbURL() {
         return dbURL;
     }

     public static void setDbURL(String dbURL) {
         DBConnectSS.dbURL = dbURL;
     }

     public static String getDatabaseName() {
         return databaseName;
     }

     public static void setDatabaseName(String databaseName) {
         DBConnectSS.databaseName = databaseName;
     }

     public static String getDbUser() {
         return dbUser;
     }

     public static void setDbUser(String dbUser) {
         DBConnectSS.dbUser = dbUser;
     }

     public static String getDbPassword() {
         return dbPassword;
     }

     public static void setDbPassword(String dbPassword) {
         DBConnectSS.dbPassword = dbPassword;
     }

 }