MySQL JDBC 编程(select)

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class test2 {
    public static void main(String[] args) throws SQLException {
        //创建DataSource
        DataSource datasource = new MysqlDataSource();
        ((MysqlDataSource) datasource).setUrl("jdbc:mysql://127.0.0.1:3306/java1217?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource) datasource).setUser("root");
        ((MysqlDataSource) datasource).setPassword("111111");
        //建立连接
        Connection connection=datasource.getConnection();
        //sql
        String sql="select * from student";
        PreparedStatement statement=connection.prepareStatement(sql);
        //执行sql
        //返回ResultSet(结果集合)
        ResultSet resultSet=statement.executeQuery();
        //遍历结果集合 通过next获取到临时表中的每一行数据,获取到最后一行后,执行next返回false循环结束
        while (resultSet.next()){
            //根据列名获取对应的值
            int id=resultSet.getInt("id");
            String name=resultSet.getString("name");
            System.out.println("id=" + id +", name="+ name);
       }


        //释放资源
        resultSet.close();
        statement.close();
        connection.close();
    }
}

 

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