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；