Java连接mysql数据库详细步骤

1、首先下载驱动（mysql官网），解压得到jar包，如：mysql-connector-java-5.1.39-bin.jar；

2、加载驱动：右击项目点击 Build Path——>Configure Build Path...





3、接下来，程序实现数据库的连接，首先创建一个类实现数据库的打开和关闭，程序如下：

Connect.jar

package GPS_Data;
import java.sql.*;

import org.omg.CORBA.PUBLIC_MEMBER;
public class Connect {
public static final String url="jdbc:mysql://localhost:3306/lunwen";
public static final String name="com.mysql.jdbc.Driver";
public static final String user="root";
public static final String password="root";

public Connection conn=null;
public PreparedStatement pst=null;

public Connect(String sql){
try{
Class.forName(name);
conn=DriverManager.getConnection(url,user,password);
pst=conn.prepareStatement(sql);
}catch(Exception e){
e.printStackTrace();
}

}
public void close(){
try{
this.conn.close();
this.pst.close();

}catch (SQLException e){
e.printStackTrace();
}
}
}

4、接下来，main函数实现引用，输出查询操作

Preprocess_Model.jar

package GPS_Data;
import java.sql.*;
import GPS_Data.Connect;
public class Preprocess_Model {
static String sql=null;
static Connect mysql1=null;
static ResultSet ret=null;

public static void main(String[] args) {
sql="select * from gps_data2";// TODO Auto-generated method stub
mysql1= new Connect(sql);
try{
ret=mysql1.pst.executeQuery();
while (ret.next()){
String lie1 = ret.getString(1);
String lie2 = ret.getString(2);
String lie3 = ret.getString(3);
String lie4 = ret.getString(4);
System.out.println(lie1 + "\t" + lie2 + "\t" + lie3 + "\t" + lie4 );

}

ret.close();
mysql1.close();

}catch(SQLException e){
e.printStackTrace();
}

}

}

查询结果如下：