Tag: spring

如何使用hibernate生成Custom Id,同时它必须是表的主键

这是我的pojo课程 @Entity public class Department { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name=”Department_Id”) private Integer deptId; @Column(name=”Department_Name”,unique=true,nullable=false) private String deptName; @Column(name=”Department_Description”) @NotNull private String deptDesc; //geters and setters 我想要的是department_id必须是此Department表的主键,此键的条目必须为DEP0001,DEP0002,DEP0003

Spring + Hibernate:具有相同标识符值的不同对象已与会话关联

在我的应用程序中,它使用Spring和Hibernate,我解析一个CSV文件,并在每次从CSV文件中读取记录时通过调用handleRow()填充数据库。 我的域名模型: ‘家庭’有很多’SubFamily’ ‘SubFamily’有很多’Locus’ ‘Locus’属于’Species’ Family SubFamily Locus都是双向映射。 码: public void handleRow(Family dummyFamily, SubFamily dummySubFamily, Locus dummyLocus) { //Service method which access DAO layers CommonService serv = ctx.getCommonService(); boolean newFamily=false; Family family=serv.getFamilyByFamilyId(dummyFamily.getFamilyId()); if(family==null){ newFamily=true; family=new Family(); family.setFamilyId(dummyFamily.getFamilyId()); family.setFamilyIPRId(dummyFamily.getFamilyIPRId()); family.setFamilyName(dummyFamily.getFamilyName()); family.setFamilyPattern(dummyFamily.getFamilyPattern()); family.setRifID(dummyFamily.getRifID()); } SubFamily subFamily = family.getSubFamilyBySubFamilyId( dummySubFamily.getSubFamilyId() ); if(subFamily==null){ subFamily=new SubFamily(); subFamily.setRifID(dummySubFamily.getRifID()); subFamily.setSubFamilyId(dummySubFamily.getSubFamilyId()); subFamily.setSubFamilyIPRId(dummySubFamily.getSubFamilyIPRId()); subFamily.setSubFamilyName(dummySubFamily.getSubFamilyName()); […]