JDBC增删改查练习

2022/6/30 23:24:05

本文主要是介绍JDBC增删改查练习,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!

 

public class test {


    @Test
    public void select() throws Exception {
        Properties prop=new Properties();

        prop.load(new FileInputStream("C:\\Users\\Administrator\\IdeaProjects\\JDBC\\JDB\\src\\druid1.properties"));
        //获取连接池对象
        DataSource datasource= DruidDataSourceFactory.createDataSource(prop);
        //获取数据库连接
        Connection connection=datasource.getConnection();

        String sql="SELECT * FROM student;";
        //获取psmt对象
        PreparedStatement psmt=connection.prepareStatement(sql);
        //执行sql语句
        ResultSet res=psmt.executeQuery();
            student stu=new student();
            List<student> students=new ArrayList<>();
        while(res.next()){
            String name=res.getString("name");
            String id=res.getString("id");
            String cellphone=res.getString("cellphone");

            stu.setName(name);
            stu.setId(id);
            stu.setCellphone(cellphone);

            students.add(stu);

        }
        System.out.println(students);
        psmt.close();
        res.close();
        connection.close();

    }

}


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