Mysql

driver下载：https://mvnrepository.com/artifact/mysql/mysql-connector-java

import java.sql.*;
public class SqlServerTest {
         public static void main(String []args) {
         String driverName="com.mysql.jdbc.Driver";
         String dbURL="jdbc:mysql://$ip:3306/$db";
         String userName="$user";
         String userPwd="$password";
          try
        {
            Class.forName(driverName);
            Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
            Statement st = dbConn.createStatement();
            ResultSet rs = st.executeQuery("select * from user");
            while (rs.next()) {
              System.out.println(rs.getString(1));
            }
            System.out.println("success!");
         }
          catch(Exception e)
       {
            e.printStackTrace();
            System.out.print("fail!");
       }
    }
 }

SqlServer

driver下载：https://mvnrepository.com/artifact/com.microsoft.sqlserver/sqljdbc4/4.0

import java.sql.*;
public class SqlServerTest {
         public static void main(String []args) {
         String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
         String dbURL="jdbc:sqlserver://$ip:1433;DatabaseName=$db";
         String userName="$user";
         String userPwd="$password";
          try
        {
            Class.forName(driverName);
            Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
            Statement st = dbConn.createStatement();
            ResultSet rs = st.executeQuery("select * from sysobjects where xtype='U'");
            while (rs.next()) {
              System.out.println(rs.getString(1));
            }
            System.out.println("success!");
         }
          catch(Exception e)
       {
            e.printStackTrace();
            System.out.print("fail!");
       }
    }
 }

Oracle

driver下载：https://www.oracle.com/database/technologies/jdbc-drivers-12c-downloads.html

import java.sql.*;
public class SqlServerTest {
         public static void main(String []args) {
         String driverName="oracle.jdbc.driver.OracleDriver";
         String dbURL="jdbc:oracle:thin:@//$ip:1521/$db";
         String userName="$user";
         String userPwd="$password";
          try
        {
            Class.forName(driverName);
            Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
            Statement st = dbConn.createStatement();
            ResultSet rs = st.executeQuery("select * from all_tab_comments");
            while (rs.next()) {
              System.out.println(rs.getString(1));
            }
            System.out.println("success!");
         }
          catch(Exception e)
       {
            e.printStackTrace();
            System.out.print("fail!");
       }
    }
 }

标签：jdbc,dbURL,String,rs,sqlserver,System,mysql,oracle,out
来源： https://www.cnblogs.com/barneywill/p/12069149.html