driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/person?serverTimezone=UTC
username=root
password=root

<configuration> <properties resource="db.properties" />      //把抽离出去的properties文件加载进来<environments default="development"><environment id="development"><transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="${driver}"/>   //用类似el表达式的方式进行引用<property name="url" value="${url}"/><property name="username" value="${username}"/><property name="password" value="${password}"/></dataSource></environment></environments><mappers><mapper resource="com/offcn/mapper/personMapper.xml"/></mappers>
</configuration>

<configuration><properties resource="db.properties" /><!-- 设置全局参数<settings><setting name="cacheEnabled" value="false" /><setting name="lazyLoadingEnabled" value="false" /></settings> 

1 　　 Student queryStudentByNameAndAge(String name,int age);
2     Student queryStudentWithHashMap(Map<String, Object> map);
3     Student queryStudentWithParam(@Param("sname") String sname,@Param("age") int age);
4     Student queryStudentWithObject(Student student);

 1 <!-- sql片段 -->
 2     <sql id="queryStudent">
 3         select sid,sname,sex,age from student
 4     </sql>
 5     <!-- 多参数 -->
 6     <!--1. 通过下标的方式进行传参 -->
 7   <select id="queryStudentByNameAndAge" resultType="student">
 8       <include refid="queryStudent" /> where sname = #{0} and age = #{1}
 9   </select>
10     <!--   2.通过HashMap进行传参 -->
11   <select id="queryStudentWithHashMap" resultType="student">
12      <include refid="queryStudent" /> where sname = #{sname} and age = #{age}
13  </select>
14  <!--   3.通过注解的方式进行传参 ,同时注解也能对对象进行注解，取值的时候用别名点属性名-->
15   <select id="queryStudentWithParam" resultType="student">
16      <include refid="queryStudent" /> where sname = #{sname} and age = #{age}
17  </select>
18
19  <!--   4.通过对象的方式进行传参 -->
20   <select id="queryStudentWithObject" parameterType="student" resultType="student">
21      <include refid="queryStudent" /> where sname = #{sname} and age = #{age}
22  </select>

 1 public static void queryStudentByNameAndAge() throws IOException {
 2         //读取配置文件
 3         Reader reader = Resources.getResourceAsReader("conf.xml");
 4         //创建sqlSessionFactory
 5         SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
 6         //创建session
 7         SqlSession session = sessionFactory.openSession();
 8         //定位映射文件
 9         studentMapper studentMapper = session.getMapper(studentMapper.class);
10         //定位sql语句并执行sql语句
11         Student student = studentMapper.queryStudentByNameAndAge("馒头",22);
12         System.out.println(student);
13         //提交事务
14         session.commit();
15         session.close();
16     }
17     public static void queryStudentWithHashMap() throws IOException {
18         //读取配置文件
19         Reader reader = Resources.getResourceAsReader("conf.xml");
20         //创建sqlSessionFactory
21         SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
22         //创建session
23         SqlSession session = sessionFactory.openSession();
24         //定位映射文件
25         studentMapper studentMapper = session.getMapper(studentMapper.class);
26         //定位sql语句并执行sql语句
27         Map<String, Object> map = new HashMap<String, Object>();
28         map.put("sname", "馒头");
29         map.put("age", 23);
30         Student student = studentMapper.queryStudentWithHashMap(map);
31         System.out.println(student);
32         //提交事务
33         session.commit();
34         session.close();
35     }
36     public static void queryStudentWithParam() throws IOException {
37         //读取配置文件
38         Reader reader = Resources.getResourceAsReader("conf.xml");
39         //创建sqlSessionFactory
40         SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
41         //创建session
42         SqlSession session = sessionFactory.openSession();
43         //定位映射文件
44         studentMapper studentMapper = session.getMapper(studentMapper.class);
45         //定位sql语句并执行sql语句
46         Student student = studentMapper.queryStudentWithParam("馒头",22);
47         System.out.println(student);
48         //提交事务
49         session.commit();
50         session.close();
51     }
52     public static void queryStudentWithObject() throws IOException {
53         //读取配置文件
54         Reader reader = Resources.getResourceAsReader("conf.xml");
55         //创建sqlSessionFactory
56         SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
57         //创建session
58         SqlSession session = sessionFactory.openSession();
59         //定位映射文件
60         studentMapper studentMapper = session.getMapper(studentMapper.class);
61         //定位sql语句并执行sql语句
62         Student stu = new Student();
63         stu.setSname("馒头");
64         stu.setAge(22);
65         Student student = studentMapper.queryStudentWithObject(stu);
66         System.out.println(student);
67         //提交事务
68         session.commit();
69         session.close();
70     }