spring jdbc查询 依赖JdbcTemplate这个类模版封装JDBC的操作

 package cn.itcast.spring.jdbc;

 import java.util.List;

 import org.springframework.jdbc.core.support.JdbcDaoSupport;

 public class PersonDao extends JdbcDaoSupport{
     public void update(){
         this.getJdbcTemplate().execute("update person set pname='a' where pid=3");
     }

     public void query(){
13         List<Person> persons = this.getJdbcTemplate().query("select * from person", new PersonRowMapper());
         for(Person person:persons){
             System.out.println(person.getPname());
         }
     }
 }

 package cn.itcast.spring.jdbc;

 import java.sql.ResultSet;
 import java.sql.SQLException;

 import org.springframework.jdbc.core.RowMapper;

 public class PersonRowMapper implements RowMapper{

     @Override
     public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
         // TODO Auto-generated method stub
         Person person = new Person();
         person.setPid(rs.getLong("pid"));
         person.setPname(rs.getString("pname"));
         person.setPsex(rs.getString("psex"));
         return person;
     }
     /**
      * crud做一下
      */

 }

 public class PersonTest {
     @Test
     public void test(){
         ApplicationContext context = new ClassPathXmlApplicationContext("cn/itcast/spring/jdbc/applicationContext.xml");
         PersonDao personDao = (PersonDao)context.getBean("personDao");
         personDao.query();
     }
 }