mybatis 参数获取 @Param方式等

mybatis_train/src/main/java/com/mapper/UserMapper.java

@@ -2,11 +2,16 @@ package com.mapper;
 
 import com.pojo.entity.UserEntity;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 import java.util.List;
+import java.util.Map;
 
 public interface UserMapper {
     List<UserEntity> findUserListByCondition(UserEntity userEntity);
     List<UserEntity> findUserForEach(List<Integer> users);
     void deleteOne(Integer id);
+    UserEntity findUserByParam(String name,Integer age);
+    UserEntity findUserByMap(Map<String,Object> map);
+    UserEntity findUserByAnnoParam(@Param("users") UserEntity userEntity);
 }

mybatis_train/src/main/resources/com/mapper/UserMapper.xml

@@ -32,5 +32,17 @@
 <delete id="deleteOne" parameterType="integer">
     delete from user where id=#{id}
 </delete>
+    <select id="findUserByParam" resultType="user">
+        select *
+        from user where name = '${arg0}' and age = ${param2};
+    </select>
+    <select id="findUserByMap" resultType="user">
+        select *
+        from user where name = #{name}  and age = #{age};
+    </select>
+    <select id="findUserByAnnoParam" resultType="user">
+        select *
+        from user where name = #{param1.name}  and age = #{users.age};
+    </select>
 
 </mapper>

mybatis_train/src/test/java/TestUserParam.java

@@ -0,0 +1,44 @@
+import com.mapper.UserMapper;
+import com.pojo.entity.UserEntity;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+
+public class TestUserParam {
+    UserMapper userMapper;
+    @Before
+    public void before() throws IOException {
+        InputStream resourceAsStream = Resources.getResourceAsStream("mybatisConfig.xml");
+        SqlSessionFactory build = new SqlSessionFactoryBuilder().build(resourceAsStream);
+        SqlSession sqlSession = build.openSession();
+        userMapper = sqlSession.getMapper(UserMapper.class);
+    }
+    @Test
+    public void testParam() {
+        UserEntity name = userMapper.findUserByParam("难", 11);
+    }
+    @Test
+    public void testParamByMap() {
+        HashMap<String, Object> hashMap = new HashMap<>();
+        hashMap.put("name","name");
+        hashMap.put("age",11);
+        UserEntity name = userMapper.findUserByMap(hashMap);
+    }
+    /**
+     * 验证参数使用@Param
+     */
+    @Test
+    public void testAnnoParam() {
+        UserEntity userEntity = new UserEntity();
+        userEntity.setName("name");
+        userEntity.setAge(11);
+        UserEntity userByAnnoParam = userMapper.findUserByAnnoParam(userEntity);
+    }
+}