anyway, thank u Eric Fitzsimmons
well, i think u misunderstand my point
let me put it this way
assum that there is a "form" (called maintain)which has a "applyPerson" and
a "confirmPerson"
then the "form"(called maintain) bean is:
------------------------------------------------------------------------------------------------------------
import org.appfuse.model.BaseObject;
import javax.persistence.*;
import javax.persistence.Entity;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.Column;
import java.util.*;
@Entity
public class Maintain extends BaseObject{
private Long id;
private Person applyPerson,confirmPerson;
private String description;
private Date applyTime;
@ManyToOne
@JoinColumn(name="APPPERSON_ID", nullable=false)
public Person getApplyPerson() {
return applyPerson;
}
public void setApplyPerson(Person applyPerson) {
this.applyPerson = applyPerson;
}
@ManyToOne
@JoinColumn(name="CONPERSON_ID", nullable=false)
public Person getConfirmPerson() {
return confirmPerson;
}
public void setConfirmPerson(Person confirmPerson) {
this.confirmPerson = confirmPerson;
}
@Column(name="applytime")
public Date getApplyTime() {
return applyTime;
}
public void setApplyTime(Date applyTime) {
this.applyTime = applyTime;
}
@Column(name="description", length=500)
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Id @GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
--------------------------------------------------------------------------------------------------------
ok, another bean we called "Person"(applyPerson and confirmPerson are from
here)
---------------------------------------------------------------------------------------------------------
import org.appfuse.model.BaseObject;
import javax.persistence.*;
import javax.persistence.Entity;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.Column;
import java.util.*;
@Entity
public class Person extends BaseObject{
private Long id;
private String name;
private Set<Maintain> applyMaintains = new HashSet<Maintain>(),
confirmMaintains = new HashSet<Maintain>();
@Id @GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name="name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@OneToMany(targetEntity=Maintain.class,mappedBy="applyPerson")
public Set<Maintain> getApplyMaintains() {
return applyMaintains;
}
public void setApplyMaintains(Set<Maintain> applyMaintains) {
this.applyMaintains = applyMaintains;
}
@OneToMany(targetEntity=Maintain.class,mappedBy="confirmPerson")
public Set<Maintain> getConfirmMaintains() {
return confirmMaintains;
}
public void setConfirmMaintains(Set<Maintain> confirmMaintains) {
this.confirmMaintains = confirmMaintains;
}
}
------------------------------------------------------------------------------------------------------
then, back to the beginning,
everything(CRUD) on Person is doing well
but, when i try to delete or save(add new&update) a "maintain form", there
comes problem
here is the situation, when i click the delete or save button, it just turns
to a blank page
and in the cmd window(jetty-run window)....occurs lots error messages(over
50lines), so its hard for me to determine what is the exact reason caused
that.
i'm not sure whether i make it clear enough this time
i appreciate your patience, Eric Fitzsimmons(all u guys who reads this topic
as well)
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