MYbatis 多参数传递方式

Mybatis查询传递参数的三种方式

1.用注解的方式传递多个参数

2.构建map

3.构建查询条件类

需求：

根据姓名和年龄查询出符合条件数据

创建表：

create table t_user (

id number(6) primary key,

name varchar2(25),

age number(3));

insert into t_user values (1,'tom',18);

insert into t_user values(2,'jim',19);

insert into t_user values(3,'aaa',18);

insert into t_user values (4,'bbb',20);

创建User类

public class User {
private Integer id;

private String name;

private Integer age;
.......省略get,set.....
}

UserMapper

public interface UserMapper {

//1.注解方式
User query(@Param(value="name")String name,@Param(value="age")Integer age);

//2.构建map
User quertByMap(Map<String, Object> map);

//3.构建查询条件类，这里就用创建好的User代替
User queryByCondition(User user);

}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.briup.dao.UserMapper" >

<select id="query" resultType="com.briup.domain.User">
select * from t_user where name=#{name}  and age=#{age}
</select>

<select id="quertByMap" parameterType="map" resultType="com.briup.domain.User">
select * from t_user where name=#{name}  and age=#{age}
</select>

<select id="queryByCondition" parameterType="com.briup.domain.User" resultType="com.briup.domain.User">
select * from t_user where name=#{name}  and age=#{age}
</select>
</mapper>

测试：

public class MybatiesTest {
private SqlSessionFactory sqlSessionFactory;

@Before
public void init() throws Exception {
String resource = "conf.xml";
Reader reader = Resources.getResourceAsReader(resource);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
}

// 测试
@Test
public void testQuery() {
SqlSession session = sqlSessionFactory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
User user = mapper.query("aaa", 18);
System.out.println(user);
}

@Test
public void testQueryByMap() {
SqlSession session = sqlSessionFactory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
Map<String, Object> map = new HashMap<String, Object>();
map.put("name", "aaa");
map.put("age", 18);
User user = mapper.quertByMap(map);
System.out.println(user);
}

@Test
public void testQueryByCondition() {
SqlSession session = sqlSessionFactory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
User conditon = new User();
conditon.setName("aaa");
conditon.setAge(18);
User user = mapper.queryByCondition(conditon);
System.out.println(user);
}

}