SchoolViewModel.java
rect
InstituteType.java
public class SchoolViewModel {
private String state;
private String city;
private String instituteType;
//getter and setter
}
Board.java
@Entity
@Table(name="REF_INSTITUTE_TYPE")
public class InstituteType implements Serializable{
private static final long serialVersionUID = 1L;
@Id
@Column(name="ID")
private Integer id;
@Column(name="INSTITUTE_TYPE")
private String instituteType;
public Integer getId() {
return id;
}
@ManyToMany(mappedBy="instituteType")
private Set<SchoolDetail> schoolDetail =new HashSet<SchoolDetail>();
//getter and setter
}
SchoolDetail.java
@Entity
@Table(name="REF_BOARD")
public class Board implements Serializable{
private static final long serialVersionUID = 1L;
@Id
@Column(name="ID")
private Integer id;
@Column(name="BAORD")
private String board;
@ManyToMany(mappedBy="board")
private Set<SchoolDetail> schoolDetail =new HashSet<SchoolDetail>();
//getter and setter
}
Main.java
@Entity
@Table(name="SCHOOL_DETAIL")
public class SchoolDetail implements Serializable{
private static final long serialVersionUID = 1L;
@Id
@Column(name="id")
private int id;
@Column(name="name")
private String name;
@Column(name="state")
private String state;
@Column(name="city")
private String city;
@ManyToMany
@JoinTable(name="SCHOOL_INSTITUTE_TYPE",
joinColumns={@JoinColumn(name="SCHOOL_ID")},
inverseJoinColumns={@JoinColumn(name="INSTITUTE_TYPE_ID")}
)
private Set<InstituteType> instituteType=new HashSet<InstituteType>();
@ManyToMany
@JoinTable(name="SCHOOL_BOARD",
joinColumns={@JoinColumn(name="SCHOOL_ID")},
inverseJoinColumns={@JoinColumn(name="BOARD_ID")}
)
private Set<Board> board=new HashSet<Board>();
//getter and setter
}
例外是:
public class SchoolBoard {
public static void main(String[] args) {
Configuration cfg=new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory sessionFactory=cfg.buildSessionFactory();
Session session=sessionFactory.openSession();
try{
SchoolViewModel svm=new SchoolViewModel();
svm.setState("Maharastra");
svm.setCity("Pune");
svm.setInstituteType("college");
SchoolDetail school=new SchoolDetail();
school.setState(svm.getState());
school.setCity(svm.getCity());
InstituteType instituteType=new InstituteType();
instituteType.setInstituteType(svm.getInstituteType());
Board board=new Board();
board.setBoard("STATE");
Example schoolExample=Example.create(school).ignoreCase().enableLike().excludeZeroes();
Example instituteTypeExample=Example.create(instituteType).ignoreCase().enableLike().excludeZeroes();
Example boardExample=Example.create(board).ignoreCase().enableLike().excludeZeroes();
Criteria criteria=session.createCriteria(SchoolDetail.class,"schoolDetail");
criteria.createAlias("schoolDetail.instituteType", "instituteType");
criteria.createAlias("schoolDetail.board", "board");
criteria.add(schoolExample);
criteria.add(instituteTypeExample);
criteria.add(boardExample);
Line - 48 List<SchoolDetail> schoolList=criteria.list();
}finally{
session.close();
sessionFactory.close();
}
}
}
描述:SchoolViewModel是pojo类,它将从前端传输数据。屏幕是搜索屏幕,包含优化您的搜索,就像任何可以过滤或缩小搜索范围的电子商务网站一样。基于用户选择数据库将从数据库中检索数据。为此,我在hibernate中通过示例实现查询。但是,虽然标准中的多个示例会引发异常。