";@OverridepublicvoidsetNonNullParameter(PreparedStatement preparedStatement,int i,List<String>strings,JdbcType jdbcType)throws SQLException{String value=StringUtils.collectionToDelimitedString(strings,DELIM);preparedStatement.setString(i,value);}
采用实体类接受参数,有一个参数为List,对应的数据库字段为nvachar,要求新增时将List序列化为String插入数据库中,查询时将String转成 List 2.具体操作 新增自定义的typeHandler,继承BaseTypeHandler,具体代码如下: packagecom.zjjg.dlbp.config;importcom.alibaba.fastjson.JSON;importcom.alibaba.fastjson.JSONArray;import...
这个类可以直接继承实体，再添加上需要在关联查询中返回的列即可：@Data@ToString(callSuper = true)@EqualsAndHashCode(callSuper = true)public class OrderDto extends Order { String userName; String productName; Double unitPrice;} 接下来的MPJLambdaWrapper就是构建查询条件的核心了，看一下我们在上面...
}@OverridepublicList<T>getNullableResult(ResultSet resultSet, String columnName)throwsSQLException {returnthis.getListByJsonArrayString(resultSet.getString(columnName)); }@OverridepublicList<T>getNullableResult(ResultSet resultSet,intcolumnIndex)throwsSQLException {returnthis.getListByJsonArrayString(resultSe...
public List<String> fillNotifyRecordList(Notify notify, String receiveUserIds, List<NotifyRecord> collect) { List<String> noticeRecordList = new ArrayList<>(200); ... // 组将两百条用户通知记录 return noticeRecordList; } 如上代码,我有一个saveNotice()方法用于保存通知消息以及用户通知记录。执行...
selectBatchIds(new ArrayList<String>(Arrays.asList("1", "2", "3"))); users.forEach(System.out::println); } //TODO 根据实体类存在条件查询 @Test public void select5(){ System.out.println("===根据实体类存在条件查询==="); User user = new User().setName("李小斌"); QueryWrapper<Us...
QueryWrapper<User> queryWrapper = new QueryWrapper<>();queryWrapper.select("DISTINCT no,type").orderByAsc("oldlu");return mapper.selectList(queryWrapper); 3 Mybatis plus实现in操作 如果是List类型的String,例如:List这种类型的,就直接放值就可以了,本文讲的是当你查询到的是一个list集合如何遍历取值,否...
==> Parameters: 冯文议(String) <== Columns: id, name, age, info, is_delete, create_time, update_time, gender, idcard_id, city_id <== Row: 1035789714459471874, 冯文议, 26, <<BLOB>>, 0, 2018-09-01 15:21:26.0, 2018-09-01 15:21:26.0, 1, 1035789714388168706, 1035762001753501698 ...
lqw.select(User::getId,User::getName,User::getAge); QueryWrapper<User> lqw = new QueryWrapper<User>(); // 我们采用select方法来添加查询种类,QueryWrapper采用String添加 lqw.select("id","name","age","tel"); List<User> userList = userDao.selectList(lqw); System.out.println(userList); }...
@Bean@DependsOn({"springCtxUtil"})public MybatisSqlSessionFactoryBean sqlSessionFactoryBean() throws Exception {MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean();// basic configString logicNotDeleteValue = "", logicDeleteValue = "", metaObjectHandler = "" , typeEnum...