Spring框架 JdbcTemplate类 @Junit单元测试，可以让方法独立执行 如：@Test

package cn.zmh.PingCe;

import org.junit.Test;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;
import java.util.Map;
/**
 * Spring框架   JdbcTemplate类
 * */
public class Demo {
    //Junit单元测试，可以让方法独立执行   @Test
    // 获取JdbcTemplate对象    连接池
    JdbcTemplate temp = new JdbcTemplate(JdbcUtils.getDataSource());

    //1. 修改1005号数据的 salary 为 10000
    @Test
    public void Test1(){
        //定义sql语句
        String sql = "update emp set salary=10000 where id=1005";
        // 执行sql语句
        int i = temp.update(sql);
        System.out.println(i);
    }

    //2. 添加一条记录
    @Test
    public void test2(){
        String sql = "insert into emp (id,ename,salary) values (1015,'码云',200)";
        int i = temp.update(sql);
        System.out.println(i);
    }

    //3. 删除最后一条的记录
    @Test
    public void test3(){
        String sql = "delete from emp where id=?";
        int i = temp.update(sql, 1015);
        System.out.println(i);
    }

    //4. 查询id为1的记录，将其封装为Map集合
    @Test
    public void test4(){
        String sql = "select * from emp where id=1001";
        Map<String, Object> map = temp.queryForMap(sql);
        System.out.println(map);
    }

    //5. 查询所有记录，将其封装为List
    @Test
    public void test5(){
        String sql = "select * from emp";
        List<Map<String, Object>> maps = temp.queryForList(sql);
        for(Map<String ,Object> m:maps){
            System.out.println(m);
        }
    }

    //6. 查询所有记录，将其封装为Emp对象的List集合
    @Test
    public void test6(){
        String sql = "select * from emp";
        List<Emp> list = temp.query(sql, new BeanPropertyRowMapper<Emp>(Emp.class));
        for(Emp e:list){
            System.out.println(e);
        }
    }

    //7. 查询总记录数
    @Test
    public void test7(){
        String sql = "select count(id) from emp";
        List<Map<String, Object>> maps = temp.queryForList(sql);
        System.out.println(maps);
    }

    //7_1. 查询总记录数
    @Test
    public void test7_1(){
        String sql = "select count(id) from emp";
        Long aLong = temp.queryForObject(sql, long.class);
        System.out.println(aLong);
    }
}