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org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of 异常
在开发项目的过程中,发现如下异常:原因是updateType字段为int类型,不能接收null,而在数据库中对应的字段为null,解决方法:将updateType字段类型改为Integer。
分类:数据库   时间:2015-03-18 19:54:54    阅读次数:179
hibernate generator class="" id详解 (转)
“assigned”主键由外部程序负责生成,在 save() 之前指定一个。“hilo”通过hi/lo 算法实现的主键生成机制,需要额外的数据库表或字段提供高位值来源。“seqhilo”与hilo 类似,通过hi/lo 算法实现的主键生成机制,需要数据库中的 Sequence,适用于支持 Seque...
分类:Web程序   时间:2015-03-17 19:37:45    阅读次数:192
Hibernate主键生成策略
在Hibernate中,提供了主键生成策略。下面是比较常用的几种:? 1:assigned? ----表示在新增数据时由应用程序指定主键的值。主要针对主键是采用自然主键的形式。这种方式,适用于主键列不是自动增长列。? 其缺...
分类:Web程序   时间:2015-03-16 08:44:44    阅读次数:224
hdu 2426 Interesting Housing Problem 最大权匹配KM算法
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2426For any school, it is hard to find a feasible accommodation plan with every student assigned to a s...
分类:编程语言   时间:2015-03-15 13:37:30    阅读次数:166
1026. Table Tennis (30)
A table tennis club has N tables available to the public. The tables are numbered from 1 to N. For any pair of players, if there are some tables open when they arrive, they will be assigned to the ava...
分类:其他好文   时间:2015-03-02 19:10:02    阅读次数:126
Hibernate自定义主键
Hibernate自定义主键,通过此方法可以解决一此特殊的主键ID,在了解自定义主键时,先了解下Hibernate有自带的10种生成主键方法.1) assigned主键由外部程序负责生成,无需Hibernate参与。推荐此种方法,在实体配置中修改如下: ...
分类:Web程序   时间:2015-02-28 18:30:18    阅读次数:151
[leet code 135]candy
1 题目There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following r...
分类:其他好文   时间:2015-02-28 00:06:36    阅读次数:211
PAT1053. Path of Equal Weight
Given a non-empty tree with root R, and with weight Wi assigned to each tree node Ti. The weight of a path from R to L is defined to be the sum of the...
分类:其他好文   时间:2015-02-26 13:02:16    阅读次数:226
LeetCode 笔记25 Candy (艰难的调试)
There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following requi...
分类:其他好文   时间:2015-02-25 23:39:26    阅读次数:202
Gambler's Ruin Problem and 3 Solutions
In my stochastic processes class, Prof Mike Steele assigned a homework problem to calculate the ruin probabilities for playing a game where you with $...
分类:其他好文   时间:2015-02-23 09:36:56    阅读次数:382
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