[英]Spring MVC 3 <form:Select> tag multiple selection
I need to select multiple values in the multiple selection form:select tag. 我需要在多选形式中选择多个值:select tag。 my jsp code is
我的jsp代码是
<form:form id="myForm"
action="service.do" modelAttribute="services"
method="POST">
....
....
<form:select path="channelsInvolved" items="${allChannels}" itemValue="channelid" itemLabel="channelname">
my controller is... 我的控制器是......
List<Channels> channels = dao.getAllChannels();
model.addAttribute("allChannels", channels);
ServiceRegistration serRegistration = dao.getById(2);
model.put("services", serRegistration);
Actually, I have 3 tables -> ServiceRegistration, Channels (contains META data) and ServiceChannel. 实际上,我有3个表 - > ServiceRegistration,Channels(包含META数据)和ServiceChannel。 ServiceChannel contains foreign key reference with both serviceregistration and channel tables.
ServiceChannel包含具有serviceregistration和channel表的外键引用。 So, one serviceid may have multiple channelid's mapped in the servicechannel table.
因此,一个serviceid可能在servicechannel表中映射了多个channelid。
my ServiceRegistration.java entity class has the channelsInvolved field as... 我的ServiceRegistration.java实体类将channelsInvolved字段作为...
@OneToMany(cascade=CascadeType.ALL,fetch = FetchType.EAGER)
@JoinTable(name = "ServiceChannel", joinColumns = {
@JoinColumn(name="serviceid", unique = true)
},
inverseJoinColumns = {
@JoinColumn(name="channelid")
}
)
private List<Channels> channelsInvolved;
public List<Channels> getChannelsInvolved() {
return channelsInvolved;
}
public void setChannelsInvolved(List<Channels> channelsInvolved) {
this.channelsInvolved = channelsInvolved;
}
Channel entity class... Channels.java Channel实体类... Channels.java
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column private int channelid;
@Column private String channelname;
ServiceChannel.java entity class... ServiceChannel.java实体类...
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column private int servicechannelid;
@ManyToOne
@JoinColumn(name = "serviceid")
private ServiceRegistration serviceRegistration;
@ManyToOne
@JoinColumn(name = "channelid")
private Channels channels;
Say, I have a service id >> 2 mapped to channelid >> 1 and 2. I am able see 2 records in the "channelsInvolved". 说,我有一个服务ID >> 2映射到channelid >> 1和2.我可以在“channelsInvolved”中看到2条记录。 But when I set the serRegistration as model attribute to the jsp, none is selected in the select tag.
但是当我将serRegistration设置为jsp的model属性时,select选项中没有选择任何一个。
help appreciated, Thanks. 帮助表示感谢,谢谢。
您将需要在实体中实现正确的equals
实现(特别是在Channels
)。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.