mybatis--删除员工&新增员工&预编译操作

springboot-mybatis-crud/src/main/java/com/inmind/SpringbootMybatisCrudApplication.java

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

springboot-mybatis-crud/src/main/java/com/inmind/mapper/EmpMapper.java

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+package com.inmind.mapper;
+
+import com.inmind.pojo.Emp;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper//生成接口的实现类对象，交给spring容器管理，DI自动注入
+public interface EmpMapper {
+    /*
+    删除员工
+     */
+    @Delete("delete from emp where id = #{id}")
+//    @Delete("delete from emp where id = ${id}")
+    public int delete(Integer id);
+
+    /*
+    新增员工
+     */
+    @Insert("insert into emp(username, name, gender, image, job, entrydate, dept_id, create_time, update_time)" +
+            "values (#{username},#{name},#{gender},#{image},#{job},#{entrydate},#{deptId},#{createTime},#{updateTime});")
+    public void insert(Emp emp);
+}

springboot-mybatis-crud/src/main/java/com/inmind/pojo/Emp.java

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+package com.inmind.pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class Emp {
+    private Integer id; //ID
+    private String username; //用户名
+    private String password;//密码
+    private String name;//姓名
+    private Short gender;//性别,1:男 2:女
+    private String image;//图像url
+    private Short job;//职位,  1:班主任 2:讲师 3:学工主管 4:教研主管 5:咨询师
+    private LocalDate entrydate;// 入职日期
+    private Integer deptId;//部门ID
+    private LocalDateTime createTime;//创建时间
+    private LocalDateTime updateTime;//修改时间
+}

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

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+
+#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/mybatis2
+#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
+
+
+#输出mybatis的日志
+mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

springboot-mybatis-crud/src/test/java/com/inmind/SpringbootMybatisCrudApplicationTests.java

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+package com.inmind;
+
+import com.inmind.mapper.EmpMapper;
+import com.inmind.pojo.Emp;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestTemplate;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+@SpringBootTest
+class SpringbootMybatisCrudApplicationTests {
+
+    @Autowired
+    private EmpMapper empMapper;
+
+    @Test
+    void contextLoads() {
+    }
+
+    @Test
+    void testDelete(){
+        //调用员工Mapper对象的删除员工的方法
+        int delete = empMapper.delete(14);
+        System.out.println("删除的员工数量为："+delete);
+    }
+
+    @Test
+    void testInsert() {
+        Emp emp = new Emp();
+        emp.setUsername("zhangsan");
+        emp.setName("张三");
+        emp.setGender((short) 1);
+        emp.setImage("1.jpg");
+        emp.setEntrydate(LocalDate.of(2025,10,26));
+        emp.setDeptId(1);
+        emp.setCreateTime(LocalDateTime.now());
+        emp.setUpdateTime(LocalDateTime.now());
+        empMapper.insert(emp);
+    }
+
+}