【sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class】的更多相关文章

sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class

1.首先,问题出现的点是在泛型 我出现问题的原因是,和泛型有关系,要调整泛型 2.我把问题出现的过程描述一哈子 1.基础类 @tk.mybatis.mapper.annotation.RegisterMapper public interface BaseModelMapper<T extends BaseModel> extends Mapper<T>,BaseExtraMapper<T> { } 2.在基础mapper上面进行封装 public interface…

利用泛型抽取Dao层，加事务注解问题（java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType）

想利用泛型抽取BaseDao层,简化操作时出现故障: @Transactional这个注解是能够继承的.于是就想写在抽取的BaseDao层上,让实现的类能够不用写@Transactional,就可开启事务. 问题描写叙述: 因为偷懒.没给BaseDao抽接口.代码例如以下: package com.liang.ssh2.base; import java.lang.reflect.ParameterizedType; import java.util.Collections; import ja…

TreeMap cannot be cast to java.lang.Comparable

/** * Constructs a new, empty tree map, using the natural ordering of its * keys. All keys inserted into the map must implement the {@link * Comparable} interface. Furthermore, all such keys must be * <i>mutually comparable</i>: <tt>k1.c…

Mybatis的失误填坑-java.lang.Integer cannot be cast to java.lang.String

Mybatis的CRUD小Demo 为方便查看每次的增删改结果,封装了查询,用来显示数据库的记录: public static void showInfo(){ SqlSession session = getSqlSesion(); String sql = "me.gacl.mapping.userMapper.getUsers"; List<Map<String,String>> users = session.selectList(sql); for(M…

cannot be cast to java.lang.Comparable

Exception in thread "main" java.lang.ClassCastException: com.myradio.People cannot be cast to java.lang.Comparable at java.util.TreeMap.compare(TreeMap.java:1294) at java.util.TreeMap.put(TreeMap.java:538) at java.util.TreeSet.add(TreeSet.java:2…

mysql连接报java.math.BigInteger cannot be cast to java.lang.Long异常

使用hibernate出现以下错误 java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java…

java.lang.ClassCastException: java.util.HashMap cannot be cast to java.lang.String

问题背景:从前端传来的json字符串中取某些值,拼接成json格式入参调外部接口. 报如下错: java.lang.ClassCastException: java.util.HashMap cannot be cast to java.lang.String at com.taobao.hsf.proxy.bytecode.proxy31.registerCancellation(proxy31.java) at com.ohaotian.approval.controller.spzx.Te…

java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String

1.错误描写叙述 java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String service.impl.ArrivalBillServiceImpl.exportBillExcel(BillServiceImpl.java:266) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.Na…

Spring boot启动时报 java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long错误

Spring boot启动时报 java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long错误: java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Longat com.mysql.jdbc.…

初学MyBatis（踩坑）Error querying database. Cause: java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long

最近在学习Mybatis,代码全部根据教程写好了,一运行结果报了一个错误,主要错误内容: Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long…