1.Spring-mybatis-删除实现-SQL注入

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

@@ -1,8 +1,19 @@
 package com.inmind.mapper;
 
+import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
 
 @Mapper
 public interface EmpMapper {
 
+    /*
+    员工删除的接口方法
+    delete from  emp where id = 17;
+    #{id}:直接将接口方法中传入的参数，使用预编译的方式，动态拼接到sql语句中，实现功能的动态化
+    ${id}:直接将参数拼接到sql中
+     */
+//    @Delete("delete from  emp where id = ${id};")
+//    public void delete(Integer id);
+    @Delete("delete from  emp where id = #{id};")
+    public int delete(Integer id);
 }

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

@@ -12,3 +12,6 @@ spring.datasource.url=jdbc:mysql://localhost:3306/mybatis
 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

@@ -1,13 +1,23 @@
 package com.inmind;
 
+import com.inmind.mapper.EmpMapper;
 import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
 class SpringbootMybatisCrudApplicationTests {
+    @Autowired
+    private EmpMapper empMapper;
 
     @Test
     void contextLoads() {
     }
 
+    @Test
+    void testDelete(){
+        int count = empMapper.delete(15);
+        System.out.println(count);
+    };
+
 }