【Mapper method 'org.lin.hms.dao.IndentDAO.insertIndent' has an unsupported return type: interface java.util.List】的更多相关文章

Mapper method 'com.xxxx.other.dao.MyDao.getNo attempted to return null from a method with a primitive return type (int)

使用myBatis调用存储过程的返回值,提示错误信息: org.apache.ibatis.binding.BindingException: Mapper method 'com.xxxx.other.dao.MyDao.getNo attempted to return null from a method with a primitive return type (int). 先查mysql监控语句,发现存储过程调用正常,也得到了返回值,继续查 对应的文件 存储过程: CREATE PRO…

SSM报错：No converter found for return value of type: class java.util.ArrayList at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverter

我使用的是SSM框架,是在编写测试RESTFUL接口的时候出现, @RequestMapping(value = "/selectAll", method = RequestMethod.GET) @ResponseBody public ResponseEntity<List<User>> selectAll() { List<User> users = this.userService.selectAll(); if (null != users…

Mybatis 报错Mapper method 'xxx' has an unsupported return type

报错原因: 出现这种错误,说明sql语句执行成功,只是返回类型出了问题. 解决方法: insert.delete.update操作默认返回一个int类型的整数,将增删改的接口改成int或者void即可. select操作返回的类型可以是自定义的Map或者是List(目前遇到的),这里等我总结了resultType相关知识再回来补充! 没有解决前: insert返回值用的是Dept类,但实际上需要传2个参数,而Dept则是三个参其中一个是自增主键,因此返回的不全就会报错.  改成Void就解决了;…

rg.apache.ibatis.binding.BindingException: Mapper method 'com.dao.Cameao.getOnlineDayRation attempted to return null from a method with a primitive return type (float)

本文为博主原创,未经允许不得转载: 异常展示如下: org.apache.ibatis.binding.BindingException: Mapper method 'com.dao.Cameao.getOnlineDayRation attempted to return null from a method with a primitive return type (float). at org.apache.ibatis.binding.MapperMethod.execute(Mapp…

mapper.xml是怎样实现Dao层接口

上午写了一个简单的 从xml读取信息实例化一个Bean对象.下午就开始想mybatis是怎么通过xml文件来实现dao层接口的,一开始想直接用Class.forName(String name)然后调用getMethods的办法来得到Dao接口所有的方法Method,结果证明这对接口实没有用的,会报一个错误.于是想百度,但是百度的结果全是怎么配置mapper的..然后我又四处翻资料,终于找到一些办法.最后我还是用到了我自己封装的DButil 和 DataUtil两个类. 反正我是这么实现的,至于…

org.apache.ibatis.binding.BindingException: Mapper method 'attempted to return null from a method with a primitive return type (long).

一.问题描述 今天发现测试环境报出来一个数据库相关的错误 org.apache.ibatis.binding.BindingException: Mapper method 'attempted to return null from a method with a primitive return type (long). 二.问题根源 经过查询后发现,Mybatis 在查询id信息的时候返回类型为long ,没有留意long和Long的区别. Long是long的包装类,long是基本数据类…

spring3+structs2整合hibernate4时报org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void sy.dao.impl.UserDaoImpl.setSessionFactory(org.hibernate.SessionFactory);

今天在spring3+structs2整合hibernate4时报如下错误,一直找不到原因: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDao': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCre…

delete attempted to return null from a method with a primitive return type (int)

今天被自己给蠢死了 今天在代码中遇到这个错误, 百度翻译一下:映射方法,从一org.system.mapper.child.chmorganizationexaminationmapper.delete返回零作为一个原始的方法的返回类型(int). org.apache.ibatis.binding.BindingException: Mapper method 'org.system.mapper.child.ChmOrganizationExaminationMapper.delete at…

报错org.apache.ibatis.binding.BindingException: Type interface com.atguigu.mybatis.bean.dao.EmployeeMapper is not known to the MapperRegistry.

报错org.apache.ibatis.binding.BindingException: Type interface com.atguigu.mybatis.bean.dao.EmployeeMapper is not known to the MapperRegistry. 我报这个错误的原因是因为mybatis-config.xml配置文件中 <!-- 批量注册: --> <package name="com.atguigu.mybatis.dao"/>…

attempted to return null from a method with a primitive return type (int).

java接口文件 package com.cyb.ms.mapper; import org.apache.ibatis.annotations.Param; public interface AccountMapper { void update(@Param("name") String name, @Param("money") int money); int queryMoney(String name); } xml文件 <?xml version=…