public AppUser loginUser(String userName, String password) { Map<String, String> map = new HashMap<String, String>(); map.put("name", userName); map.put("password", password); return sqlSession.selectOne(AppUser.class.getName()+"_Mapper.loginUser", map); } 1. 2. 3. 4. 5. 6. ...
1.传Map 1Map<String,Object> params=newHashMap<String, Object>();2params.put("mmsi",mmsi);3List<ShipImage> imageList=shipImageMapper.getImagesByMMSI(params);45<select id="getImagesByMMSI"parameterType="java.util.Map"resultMap="BaseResultMap">6SELECT a.*from ship_image a7<where>8<iftest=...
public Map<String,String> queryUserNameByUserCode() { MapResultHandler handler = new MapResultHandler(); this.getSqlSession().select(UserMapper.class.getName()+ ".queryUserNameByUserCode", RowBounds.DEFAULT, handler); Map<String, String> map = handler.getMappedResults(); return map; } /** ...
如果用Map 接返回值,会报Long转String的类型错误 原因是COUNT返回的Number类型会和Java的Long类型进行匹配 当Mapper层用Map 接数据时,仍...
1、mybatis只返回单个map mapper接口: Map<String,Object> selectCount(String provCode); mybatis的xml文件中: <select id="selectCount" resultType="map"> select city_code as "cityCode", count(*) as "count" from prov_code_count where prov_code = #{provCode} group by city_code </select> ...
<resultMap id="roleMap" type="com.wlong.modules.base.entity.RoleEntity"> <result property="roleName" column="role_name" /> </resultMap> <select id="selectRoleById" parameterType="Integer" resultMap="roleMap"> select * from `role` where id = #{id} ...
第一个foreach标签里面你的item是mapS，你后面用的maps当然要报错了，这个是要大小写严格区分的
我们先来了解下Statement对象,在原始JDBC操作中,会有加载驱动,设置属性,获取连接,创建Statement对象...等一系列操作。Statement对象在JDBC操作中就是向数据库发送sql语句,并获取到执行结果。Statement对象有三种,分别是Statement,PreparedStatement,CallableStatement。它们的继承关系如下 ...
// 使用 $ 符号拼接字符串String sql="SELECT * FROM users WHERE name = ${name}";Map<String,Object>params=newHashMap<>();params.put("name","a' or '1' = '1");// 执行 SQL 语句SqlSession sqlSession=sqlSessionFactory.openSession();List<User>users=sqlSession.selectList(sql,params); ...