数据库中的JSF Bean未显示 [英] JSF bean from database not shown
问题描述
我有以下bean:
import java.util.List;
import javax.faces.bean.RequestScoped;
import javax.annotations.ManagedBean;
import javax.persistence.EntityManager;
import listener.EMF;
import model.CustomerOrder;
@MangedBean
@RequestScoped
public class OrderBean {
private List<CustomerOrder> orderList;
/**
* Creates a new instance of OrderBean
*/
public OrderBean() {
EntityManager em = EMF.createEntityManager();
this.orderList = em.createNamedQuery("CustomerOrder.findAll").getResultList();
System.out.println("=== Orderlist ===");
for (CustomerOrder order : orderList) {
System.out.println(order.getNumber());
}
em.close();
}
public List<CustomerOrder> getOrderList() {
System.out.println("=== In getOrderList ===");
return orderList;
}
public void setOrderList(List<CustomerOrder> orderList) {
this.orderList = orderList;
}
}
CustomerOrder类是一个JPA类:
The CustomerOrder class is a JPA class:
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.*;
import java.util.regex.*;
import javax.persistence.*;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import listener.EMF;
import regex.AttachmentAnalyzer;
@Entity
@Table(name = "customerorder")
@NamedQueries({
@NamedQuery(name = "CustomerOrder.findAll", query = "SELECT c FROM CustomerOrder c"),
@NamedQuery(name = "CustomerOrder.findById", query = "SELECT c FROM CustomerOrder c WHERE c.id = :id"),
@NamedQuery(name = "CustomerOrder.findByNumber", query = "SELECT c FROM CustomerOrder c WHERE c.number = :number"),
@NamedQuery(name = "CustomerOrder.findByCalculationparameter", query = "SELECT c FROM CustomerOrder c WHERE c.calculationparameter = :calculationparameter"),
@NamedQuery(name = "CustomerOrder.findByActive", query = "SELECT c FROM CustomerOrder c WHERE c.active = :active"),
@NamedQuery(name = "CustomerOrder.findByLastupdate", query = "SELECT c FROM CustomerOrder c WHERE c.lastupdate = :lastupdate")})
public class CustomerOrder implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id")
private Integer id;
@Size(max = 255)
@Column(name = "number")
private String number;
@Column(name = "calculationparameter")
private BigDecimal calculationparameter;
@Column(name = "active")
private Short active;
@Basic(optional = false)
@NotNull
@Column(name = "lastupdate")
@Temporal(TemporalType.TIMESTAMP)
private Date lastupdate;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "customerorderId")
private List<Orderline> orderlineList;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "customerorderId")
private List<Attachment> attachmentList;
@JoinColumn(name = "lastupdateby", referencedColumnName = "id")
@ManyToOne(optional = false)
private User lastupdateby;
@JoinColumn(name = "customer_id", referencedColumnName = "id")
@ManyToOne
private Customer customerId;
@Transient
private boolean validOrder;
public CustomerOrder() {
}
public CustomerOrder(Email email) {
this.attachmentList = email.getAttachments();
EntityManager em = EMF.createEntityManager();
List<Customer> customers = em.createNamedQuery("Customer.findAll").getResultList();
User systemUser = (User) em.createNamedQuery("User.findByName").setParameter("name", "system").getSingleResult();
em.close();
for (Customer customer : customers) {
String fromAddressFilter = customer.getEmailaddressfilter();
String subjectFilter = customer.getEmailsubjectfilter();
String subject = email.getSubject();
String content = email.getContent();
if (isMatch(email.getSubject(), subjectFilter)
&& isMatch(email.getFromAddress(), fromAddressFilter)) {
this.validOrder = true;
this.active = 1;
AttachmentAnalyzer analyzer = new AttachmentAnalyzer(customer, subject, content, attachmentList);
this.number = analyzer.getNumber();
this.calculationparameter = analyzer.getCalculationParameter();
this.orderlineList = analyzer.getOrderlineList();
this.customerId = customer;
this.lastupdateby = systemUser;
for (Attachment a : attachmentList) {
a.setCustomerorderId(this);
}
for (Orderline o : orderlineList) {
o.setCustomerorderId(this);
o.setLastupdateby(systemUser);
}
} else {
this.validOrder = false;
}
}
}
private boolean isMatch(String string, String filter) {
Pattern pattern;
pattern = Pattern.compile(filter);
Matcher matcher = pattern.matcher(string);
boolean isMatch = matcher.find();
return isMatch;
}
// getters, setters and overrided hashCode, equal and toString methods omitted
}
当接收到新的电子邮件消息时，Quartz会调用JPA类的构造函数CustomerOrder(Email email).我测试了这一点，这是可行的.我的数据库中有一些客户订单记录.
The JPA class constructor CustomerOrder(Email email) is called by Quartz when a new email message is received. I tested this and this works. I have some customerorder records in my database.
最后是我的JSF页面:
Finally my JSF page:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html">
<h:head>
<title>Test page</title>
</h:head>
<h:body>
<h:dataTable var="order" value="#{orderBean.orderList}" >
<h:column>
#{order.customerId}
</h:column>
</h:dataTable>
</h:body>
</html>
我希望这能从表中输出带有数据库中的customerorders的customerId字段.但是，它只返回一个空表.
I am expecting this to output the customerId fields from thetable with customerorders in the database. However, it just returns an empty table.
我至少希望在我的服务器终端中显示来自Bean的Sysout消息，但甚至不显示这些消息.
I would at least expect that in my server terminal the Sysout messages from the bean are shown, but even these are not shown.
问题:我的代码有什么问题，为什么我的数据库条目没有显示?我该如何调试此问题?
Question: What is wrong with my code, why are my database entry's not shown? How can I debug this problem?
推荐答案
使用Java 8，eclipse luna，tomcat 8和mojarra 2.2.7;
从javax.faces.bean.ManagedBean而不是javax.annotations.ManagedBean导入@ManagedBean后，它就可以正常工作.
using java 8, eclipse luna, tomcat 8 and mojarra 2.2.7;
after importing @ManagedBean from javax.faces.bean.ManagedBean instead of javax.annotations.ManagedBean, it works just fine.
这篇关于数据库中的JSF Bean未显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
