Java学习---连接数据库操作

Java连接Oracle数据库

package com.ftl.mysql;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class HelloFtl {
    public static final String DBDRIVER= "oracle.jdbc.driver.OracleDriver";
    public static final String DBURL= "jdbc:oracle:thin:@localhost:1521:impdb";
    public static final String DBUSER= "test";
    public static final String DBPASS= "Ch_123";
    
    public static void main(String[] args) throws Exception  {
        System.out.println("--------------------------------------");
            Connection conn = null;
            PreparedStatement pstmt = null;
            ResultSet rs = null;
            String sql = null;
            Class.forName(DBDRIVER);
            conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS) ;
//            sql = "select * from teachers ";
            sql = "select tname from teachers where tid = ? and score = ?";
            int tid = 1;
            int score = 100;
            String name = null;
            pstmt = conn.prepareStatement(sql);
            pstmt.setInt(1, tid);
            pstmt.setInt(2, score);
            rs = pstmt.executeQuery();
            while(rs.next())
            {
//                int tid = rs.getInt(1);
//                String tname = rs.getString(2);
//                String sex = rs.getString(3);
//                float score = rs.getFloat(4);
//                System.out.println("Tid: " +  tid + "	 Tname: " + tname +
//                            "	 sex: " + sex + "	 score: " + score);
                name = rs.getString(1);
                System.out.println(name);
            }
            
        System.out.println("--------------------------------------");
    }
};

Java连接Mysql数据库

package cn.mldn.lxh ;
import java.sql.Connection ;
import java.sql.DriverManager ;
public class DatabaseConnection {
    public static final String DBDRIVER= "com.mysql.jdbc.Driver";
    public static final String DBURL= "jdbc:mysql://localhost:3306/RUNOOB";
    public static final String DBUSER= "test";
    public static final String DBPASSWORD= "Changeme_123";
    
    private Connection conn ;
    public DatabaseConnection() throws Exception {
        Class.forName(DBDRIVER) ;
        this.conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD) ;
    }
    public Connection getConnection(){
        return this.conn ;
    }
    public void close() throws Exception {
        if(this.conn != null){
            try{
                this.conn.close() ;
            }catch(Exception e){
                throw e ;
            }
        }
    }
}

jar包下载

[更多参考]   

http://www.runoob.com/java/java-mysql-connect.html

Java实例---简单的数据库操作

数据库建模工具 PD的使用

Linu下的Mysql学习详解_【all】