Java realizes a simple example of connecting to oracle/mysql database function

This article mainly introduces the function of connecting Oracle/mysql database implemented by java, and analyzes the related operation skills of java based on jdbc to connect Oracle and mysql in the form of examples. It also comes with complete example code and oracle+mysql database driver package for readers. Download for reference, friends in need can refer to

The example in this article describes the function of connecting to the oracle mysql database implemented in java. Share it with everyone for your reference, the details are as follows:

package com.nuo.test.Connection;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBUtil{
    public static Connection getConnection() throws Exception{
        Connection conn=null;
        try {
            Class.forName(
                //"oracle.jdbc.driver.OracleDriver"
                "com.mysql.jdbc.Driver"
            );
            conn=DriverManager.getConnection(
                //"jdbc:oracle:thin:@127.0.0.1:1521:qiye","jossinfo","tao"
                "jdbc:mysql://localhost:3306/care","root","nuo"
            );
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        return conn;
    }
    public static void close(Connection conn) throws Exception{
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                System.out.println(e);
            }
        }
    }
    public static void main(String[] args) throws Exception{
        ResultSet rs = null;
        Connection conn = null;
        String valiresult="";
        try{
            conn = DBUtil.getConnection();
            PreparedStatement prep = conn.prepareStatement(    
                "select * from tab_user "
            );
            rs = prep.executeQuery();
            while(rs.next()){
                valiresult=rs.getString(1);//表第一列内容
                System.out.println(valiresult);
            }
        }catch(Exception e){
            e.printStackTrace();
            throw e;
        }finally{
            DBUtil.close(conn);
        }
    }
}

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