1 package cn.zmh.PingCe;
 2
 3 import org.junit.Test;
 4 import org.springframework.jdbc.core.BeanPropertyRowMapper;
 5 import org.springframework.jdbc.core.JdbcTemplate;
 6
 7 import java.util.List;
 8 import java.util.Map;
 9 /**
10  * Spring框架   JdbcTemplate类
11  * */
12 public class Demo {
13     //Junit单元测试，可以让方法独立执行   @Test
14     // 获取JdbcTemplate对象    连接池
15     JdbcTemplate temp = new JdbcTemplate(JdbcUtils.getDataSource());
16
17     //1. 修改1005号数据的 salary 为 10000
18     @Test
19     public void Test1(){
20         //定义sql语句
21         String sql = "update emp set salary=10000 where id=1005";
22         // 执行sql语句
23         int i = temp.update(sql);
24         System.out.println(i);
25     }
26
27     //2. 添加一条记录
28     @Test
29     public void test2(){
30         String sql = "insert into emp (id,ename,salary) values (1015,'码云',200)";
31         int i = temp.update(sql);
32         System.out.println(i);
33     }
34
35     //3. 删除最后一条的记录
36     @Test
37     public void test3(){
38         String sql = "delete from emp where id=?";
39         int i = temp.update(sql, 1015);
40         System.out.println(i);
41     }
42
43     //4. 查询id为1的记录，将其封装为Map集合
44     @Test
45     public void test4(){
46         String sql = "select * from emp where id=1001";
47         Map<String, Object> map = temp.queryForMap(sql);
48         System.out.println(map);
49     }
50
51     //5. 查询所有记录，将其封装为List
52     @Test
53     public void test5(){
54         String sql = "select * from emp";
55         List<Map<String, Object>> maps = temp.queryForList(sql);
56         for(Map<String ,Object> m:maps){
57             System.out.println(m);
58         }
59     }
60
61     //6. 查询所有记录，将其封装为Emp对象的List集合
62     @Test
63     public void test6(){
64         String sql = "select * from emp";
65         List<Emp> list = temp.query(sql, new BeanPropertyRowMapper<Emp>(Emp.class));
66         for(Emp e:list){
67             System.out.println(e);
68         }
69     }
70
71     //7. 查询总记录数
72     @Test
73     public void test7(){
74         String sql = "select count(id) from emp";
75         List<Map<String, Object>> maps = temp.queryForList(sql);
76         System.out.println(maps);
77     }
78
79     //7_1. 查询总记录数
80     @Test
81     public void test7_1(){
82         String sql = "select count(id) from emp";
83         Long aLong = temp.queryForObject(sql, long.class);
84         System.out.println(aLong);
85     }
86 }