mybatis 各种查询功能

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

@@ -3,11 +3,13 @@ package com.mapper;
 import com.pojo.dto.AccountVO;
 import com.pojo.entity.AccountEntity;
 import com.pojo.entity.AccountRealEntity;
+import org.apache.ibatis.annotations.MapKey;
 import org.apache.ibatis.annotations.Mapper;
 import org.springframework.stereotype.Component;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
+import java.util.Map;
 
 public interface AccountMapper {
     List<AccountEntity> findAll(Integer id);
@@ -17,6 +19,8 @@ public interface AccountMapper {
     // 多对一查询
     AccountVO findVO(Integer id);
     AccountVO findByStep(Integer id);
+    @MapKey("dep_id")
+    Map<Integer,AccountRealEntity> findAllMap();
 
 
 }

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

@@ -1,6 +1,7 @@
 package com.mapper;
 
 import com.pojo.entity.UserEntity;
+import org.apache.ibatis.annotations.MapKey;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 
@@ -14,4 +15,7 @@ public interface UserMapper {
     UserEntity findUserByParam(String name,Integer age);
     UserEntity findUserByMap(Map<String,Object> map);
     UserEntity findUserByAnnoParam(@Param("users") UserEntity userEntity);
+    Map<String,Object> findByMap(@Param("id") Integer id);
+    @MapKey("address")
+    Map<String,Object> findAllByMap();
 }

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

@@ -51,4 +51,7 @@
     <select id="findByStep" parameterType="java.lang.Integer" resultMap="finByStepMap">
         select * from account where id= #{id}
     </select>
+    <select id="findAllMap"  resultType="map">
+        select * from account
+    </select>
 </mapper>

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

@@ -44,5 +44,12 @@
         select *
         from user where name = #{param1.name}  and age = #{users.age};
     </select>
-
+    <select id="findByMap" resultType="map">
+        select *
+        from user where id = #{id}
+    </select>
+    <select id="findAllByMap" resultType="map">
+        select *
+        from user
+    </select>
 </mapper>

mybatis_train/src/test/java/Test3.java

@@ -1,6 +1,7 @@
 import com.mapper.AccountMapper;
 import com.mapper.UserMapper;
 import com.pojo.dto.AccountVO;
+import com.pojo.entity.AccountRealEntity;
 import com.pojo.entity.UserEntity;
 import org.apache.ibatis.io.Resources;
 import org.apache.ibatis.session.SqlSession;
@@ -14,6 +15,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 /**
  * 动态sql查询
@@ -85,6 +87,11 @@ public class Test3 {
         System.out.println(byStep.getUserName());
         return;
     }
+    @Test
+    public void testAllMap() {
+        Map<Integer, AccountRealEntity> allMap = accountMapper.findAllMap();
+
+    }
 
 
     @Test

mybatis_train/src/test/java/TestUserParam.java

@@ -10,6 +10,7 @@ import org.junit.Test;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.HashMap;
+import java.util.Map;
 
 public class TestUserParam {
     UserMapper userMapper;
@@ -41,4 +42,18 @@ public class TestUserParam {
         userEntity.setAge(11);
         UserEntity userByAnnoParam = userMapper.findUserByAnnoParam(userEntity);
     }
+
+    /**
+     * 测试查到到map
+     *
+     */
+    @Test
+    public void findByMap() {
+        Map<String, Object> byMap = userMapper.findByMap(1);
+        System.out.println(byMap.get("name"));
+    }
+    @Test
+    public void findAllByMap() {
+        Map<String, Object> byMap = userMapper.findAllByMap();
+    }
 }