修正

springboot_05_mybatis/src/main/java/com/yv/Springboot05MybatisApplication.java

@@ -0,0 +1,16 @@
+package com.yv;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author YoVinchen
+ */
+@SpringBootApplication
+public class Springboot05MybatisApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Springboot05MybatisApplication.class, args);
+	}
+
+}

springboot_05_mybatis/src/main/java/com/yv/dao/BookDao.java

@@ -0,0 +1,19 @@
+package com.yv.dao;
+
+import com.yv.domain.Book;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+
+/**
+ * @author YoVinchen
+ * @date 2023/3/9 下午 3:25
+ */
+@Mapper
+public interface BookDao {
+    /**
+     * @param id
+     * @return
+     */
+    @Select("select * from tbl_book where id = #{id}")
+    public Book getById(Integer id);
+}

springboot_05_mybatis/src/main/java/com/yv/domain/Book.java

@@ -0,0 +1,55 @@
+package com.yv.domain;
+
+/**
+ * @author YoVinchen
+ * @date 2023/3/9 下午 3:23
+ */
+
+public class Book {
+    private Integer id;
+    private String  type;
+    private String  name;
+    private String  description;
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "id=" + id +
+                ", type='" + type + '\'' +
+                ", name='" + name + '\'' +
+                ", description='" + description + '\'' +
+                '}';
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+}

springboot_05_mybatis/src/main/resources/application.yml

@@ -0,0 +1,8 @@
+#??????
+
+spring:
+  datasource:
+    driver-class-name: com.mysql.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/ssm_db?useSSL=false
+    username: root
+    password: 8520

springboot_05_mybatis/src/test/java/com/yv/Springboot05MybatisApplicationTests.java

@@ -0,0 +1,19 @@
+package com.yv;
+
+import com.yv.dao.BookDao;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Springboot05MybatisApplicationTests {
+    @Autowired
+    private BookDao bookDao;
+
+
+    @Test
+    void contextLoads() {
+        System.out.println(bookDao.getById(1));
+    }
+
+}