paip.hibernate list 返回位null的解决

paip.hibernate list 返回位null的解决

但是size是对的...

里面都是null...

hb3.2版本...oracle11g

＝＝＝＝＝＝＝＝＝原因：没主键

也许没主键,看累挂,真的没...

走加上...在myeclipse生成...走ok兰...发现生成的pojo和没主键的时候儿也不一样...

作者 老哇的爪子 Attilax 艾龙， EMAIL:1466519819@qq.com

来源： http://blog.csdn.net/attilax
// Fields

private Long id;

private Long vdnid;

private Long userid;

private Long confkbstypepid;

private Long departmentid;

private Long grpsubsitepid;

private String question;

private String keyword;

private String answer;

private Long belong;





// Property accessors

@GenericGenerator(name = "generator", strategy = "increment")

@Id

@GeneratedValue(generator = "generator")

@Column(name = "ID", unique = true, nullable = false, precision = 22, scale = 0)

public Long getId() {

return this.id;

}



要是没主键,走弄个..

// Fields

private TConfKbsId id;

// Property accessors

@EmbeddedId

@AttributeOverrides( {

@AttributeOverride(name = "vdnid", column = @Column(name = "VDNID", precision = 22, scale = 0)),

@AttributeOverride(name = "userid", column = @Column(name = "USERID", precision = 22, scale = 0)),

@AttributeOverride(name = "confkbstypepid", column = @Column(name = "CONFKBSTYPEPID", precision = 22, scale = 0)),

@AttributeOverride(name = "departmentid", column = @Column(name = "DEPARTMENTID", precision = 22, scale = 0)),

@AttributeOverride(name = "grpsubsitepid", column = @Column(name = "GRPSUBSITEPID", precision = 22, scale = 0)),

@AttributeOverride(name = "id", column = @Column(name = "ID", precision = 22, scale = 0)),

@AttributeOverride(name = "question", column = @Column(name = "QUESTION", length = 2048)),

@AttributeOverride(name = "keyword", column = @Column(name = "KEYWORD", length = 2048)),

@AttributeOverride(name = "answer", column = @Column(name = "ANSWER", length = 1096)),

@AttributeOverride(name = "belong", column = @Column(name = "BELONG", precision = 22, scale = 0)) })

public TConfKbsId getId() {

return this.id;

}

参考

hibernate 查询视图返回list为null的解决方法 2013-01-08 16:12:37

分类： Linux

hibernate查询视图时，会将视图的所有字段作为主键，如果存在为空字段则返回值就为空，也就查询不到相应的结果。myeclipse反转工具生成的实体包含两个表，一个表是EntPriWarQueryId，一个表是EntPriWarQuery，处理方法如下：

1.把此表EntPriWarQuery当做普通的表处理，增加主键及主键生成策略，还有相关的get和set方法，也就是说把该表处理成普通的实体；

2.在创建视图时把可能为空的字段做处理，forexampl：

case when p.fileno is null then '0'

else p.fileno

end as fileno,

是为空的字段有值即可；