首先下载MyBatis jar包， 可以去MyBatis中文官网下载

项目中导入MyBatis jar包和JDBC jar包（此处用的MySQL）

新建conf.xml

内容如下：

　　配置好后写个Student类测试：

1 public class Student { 2     int id; 3     String name; 4     int age; 5     String sex; 6  7     public int getId() { 8         return id; 9     }10 11     public void setId(int id) {12         this.id = id;13     }14 15     public String getName() {16         return name;17     }18 19     public void setName(String name) {20         this.name = name;21     }22 23     public int getAge() {24         return age;25     }26 27     public void setAge(int age) {28         this.age = age;29     }30 31     public String getSex() {32         return sex;33     }34 35     public void setSex(String sex) {36         this.sex = sex;37     }38 39     @Override40     public String toString() {41         return "Student{" +42                 "id=" + id +43                 ", name='" + name + '\'' +44                 ", age=" + age +45                 ", sex='" + sex + '\'' +46                 '}';47     }48 }

带着toString（）一会print方便

同时在数据库中创建student表，并插入几条数据：

1 CREATE TABLE student 2 ( 3     id int PRIMARY KEY, 4     name VARCHAR(20), 5     age INT, 6     sex VARCHAR(4) 7 ) 8 insert into student values(1, '张三', 20, '女'); 9 insert into student values(2, '李四', 21, '女');10 insert into student values(3, '王五', 22, '男');11 insert into student values(4, '马六', 23, '男');

配置Mapper.xml文件（上方Mapper resource写此文件）

用Mapper方式， 定义接口：

1 import java.util.List;2 3 public interface StudentMapper {4     public Student getOneStudent(int id);5     public List
      
        getAllStudents();6 }
      

 

下面编写测试类：

1 import org.apache.ibatis.io.Resources; 2 import org.apache.ibatis.session.SqlSession; 3 import org.apache.ibatis.session.SqlSessionFactory; 4 import org.apache.ibatis.session.SqlSessionFactoryBuilder; 5  6 import java.io.IOException; 7 import java.io.InputStream; 8 import java.util.List; 9 10 public class Test {11     public static void main(String[] args) throws IOException {12         String resource = "conf.xml";13         InputStream inputStream = Resources.getResourceAsStream(resource);14         SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);15         SqlSession session = sqlSessionFactory.openSession();16         StudentMapper studentMapper = session.getMapper(StudentMapper.class);17         Student s = studentMapper.getOneStudent(1);18         List
      
        arrayStudents = studentMapper.getAllStudents();19         System.out.println(s);20         System.out.println(arrayStudents);21     }
      

 

测试成功：