Map<String, Object> studentMap =newHashMap<>(); studentMap.put("name", "John"); studentMap.put("age", 20);//插入数据studentMapper.insert(studentMap); } } 2、查询数据: @ServicepublicclassStudentService { @AutowiredprivateStudentMapper studentMapper;publicList<Map<String, Object>>getStudents...
Page<User> page = userMapper.pageWithMap(new Page(request.getCurrent(), request.getSize()), paramsMap); Page<User> page = userMapper.pageWithMapDefault(new Page(request.getCurrent(), request.getSize()), paramsMap); return R.ok(page); } @GetMapping("/api/user/page/map/default") pub...
Map<String,Object> columnMap = new HashMap<>(); columnMap.put("gender",0); columnMap.put("age",18); emplopyeeDao.deleteByMap(columnMap); 注:该方法与selectByMap类似,将条件封装在columnMap中,然后调用deleteByMap方法,传入columnMap即可,返回值是Integer类型,表示影响的行数。 (3)、根据id批量...
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!--namespace=绑定一个对应的Dao/Mapper接口--><mappernamespace="com.cn.springbootmybatisplus06.mapper.UserMapper"><selectid="selectMapById"resultType="map">select id,name,age,email from user<where><iftest="id!=null">and id=#{id}</if>...
从语义的角度,insert、update、delete都是属于对数据库的行进行更新操作 从实现的角度,我们熟悉的PreparedStatement里面提供了两种execute方法,一种是executeUpdate(),一种是executeQuery(),前者对应的是insert、update与delete,后者对应的是select,因此对于MyBatis来说只有update与select ...
通过map条件删除记录 @Testvoid testDeleteByMap(){ //DELETE FROM user WHERE name = ? AND age = ? Map<String,Object> map=new HashMap<>(); map.put("age",12); map.put("name","lisi"); int result = userMapper.deleteByMap(map); System.out.println("受影响行数："+...
map-underscore-to-camel-case: true cache-enabled: false # 返回map时,true:当查询数据为空时字段返回为null;false:不加这个查询数据为空时,字段将被隐藏 call-setters-on-nulls: true # sql日志打印 log-impl: org.apache.ibatis.logging.stdout.StdOutImpl ...
Map<String,Object> columnMap = new HashMap<>();columnMap.put("gender",0);columnMap.put("age",18);emplopyeeDao.deleteByMap(columnMap); 注:该方法与selectByMap类似,将条件封装在columnMap中,然后调用deleteByMap方法,传入columnMap即可,返回值是Integer类型,表示影响的行数。
*/privateMap<String,String>SEX_MAP=newConcurrentHashMap<String,String>(){{put("0","女");put("1","男");}};@OverridepublicStringgetNameByCode(FieldDict fieldDict,String code){System.err.println("字段类型:"+fieldDict.type()+",编码:"+code);returnSEX_MAP.get(code);}} ...
Map<String, Object> columnMap 表字段 map 对象 QueryWrapper<User> queryWrapper = new QueryWrapper<>(); queryWrapper.eq("name","小明-saveOrUpdate1"); userMapper.delete(queryWrapper); 其它方法参考上节的Service Update // 根据 whereWrapper 条件,更新记录 ...