Spring-mybatis-入门程序

springboot-mybatis-quickstart/src/main/java/com/inmind/SpringbootMybatisQuickstartApplication.java

@@ -0,0 +1,13 @@
+package com.inmind;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringbootMybatisQuickstartApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringbootMybatisQuickstartApplication.class, args);
+    }
+
+}

springboot-mybatis-quickstart/src/main/java/com/inmind/mapper/UserMapper.java

@@ -0,0 +1,19 @@
+package com.inmind.mapper;
+
+import com.inmind.pojo.User;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
+
+//让mybatis进行识别是Mapper接口
+//注意：在运行时，@Mapper会自动生成该接口UserMapper的实现类对象（代理对象），并且将该代理对象交给spring的IOC容器管理
+@Mapper
+public interface UserMapper {
+
+    /*
+    查询所有用户数据
+     */
+    @Select("select  * from user;")
+    public List<User> list();
+}

springboot-mybatis-quickstart/src/main/java/com/inmind/pojo/User.java

@@ -0,0 +1,71 @@
+package com.inmind.pojo;
+
+public class User {
+    private Integer id;
+    private String name;
+    private Integer age;
+    private Short gender;
+    private String phone;
+
+    public User() {
+    }
+
+    public User(Integer id, String name, Integer age, Short gender, String phone) {
+        this.id = id;
+        this.name = name;
+        this.age = age;
+        this.gender = gender;
+        this.phone = phone;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", gender=" + gender +
+                ", phone='" + phone + '\'' +
+                '}';
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public Short getGender() {
+        return gender;
+    }
+
+    public void setGender(Short gender) {
+        this.gender = gender;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+}

springboot-mybatis-quickstart/src/main/resources/application.properties

@@ -0,0 +1,15 @@
+#下面这些内容是为了让MyBatis映射
+#指定Mybatis的Mapper文件
+mybatis.mapper-locations=classpath:mappers/*xml
+#指定Mybatis的实体目录
+mybatis.type-aliases-package=com.inmind.mybatis.entity
+
+
+#驱动类名称
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+#数据库连接的url
+spring.datasource.url=jdbc:mysql://localhost:3306/mybatis
+#连接数据库的用户名
+spring.datasource.username=root
+#连接数据库的密码
+spring.datasource.password=1234

springboot-mybatis-quickstart/src/test/java/com/inmind/SpringbootMybatisQuickstartApplicationTests.java

@@ -0,0 +1,26 @@
+package com.inmind;
+
+import com.inmind.mapper.UserMapper;
+import com.inmind.pojo.User;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.List;
+
+@SpringBootTest
+class SpringbootMybatisQuickstartApplicationTests {
+
+    @Autowired//直接从IOC容器中获取UserMapper类型的对象
+    private UserMapper userMapper;
+
+    @Test
+    void contextLoads() {
+        //使用mybatis框架查询所有用户的数据
+        List<User> list = userMapper.list();
+        list.stream().forEach(user -> {
+            System.out.println(user);
+        });
+    }
+
+}