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);
     }
 }