Jsf 更改页面时丢失p:datatable中的选中信息

我知道这不是虫子。 但我需要一个建议，我能做些什么不丢失检查线的检查知识

在JSF页面上：

<h:form prependId="false" id="searchUserFormTable" > 
                    <p:dataTable  id="selectUserTable" var="user" 
                    value="#{userListController.lazyDataModel}" paginator="true"
                    paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
                    rows="2" paginatorPosition="bottom" rowKey="#{user}"
                    lazy="true"
                    rowsPerPageTemplate="2,10,20,30,40,50"
                    rendered="#{userListController.lazyDataModel != null}" selection="#{systemMessageEditController.receiverList}"
                    scrollable="true" scrollHeight="250" resizableColumns="false" >


                    <p:column selectionMode="multiple" width="18" />

                    <f:facet name="header">
                        <h:outputText value=" Users (#{userListController.lazyDataModel.rowCount})"  />
                    </f:facet>

                    <p:column filterBy="#{user.name}" headerText="Name" filterMatchMode="contains" width="80">
                        #{user.name}
                    </p:column>
                    <p:column filterBy="#{user.surname}" headerText="Surname" filterMatchMode="contains" width="80">
                        #{user.surname}
                    </p:column>   
                    <p:column headerText="Gender" width="80">
                        #{user.gender}
                    </p:column>

                    <p:column headerText="City" width="80">                             
                        #{user.address.city.name}
                    </p:column>

                    <p:column headerText="Status" width="80">                               
                        #{user.userStatus}
                    </p:column>

                    <p:column headerText="User Detail" width="80">
                        <h:link value="User Detail" outcome="/view/admin/usermanagement/userInfo.jsf">
                            <f:param name="userId" value="#{user.id}" />
                        </h:link>
                    </p:column>



                </p:dataTable>
                        <p:commandButton value="Tamam" oncomplete="userListDlg.hide();" update=":newMessageForm"></p:commandButton>
            </h:form>

#{user.name}
#{用户姓氏}
#{user.gender}
#{user.address.city.name}
#{user.userStatus}

所有控制器：

    @ManagedBean(name="systemMessageEditController")
@ViewScoped
public class SystemMessageEditController {

    @ManagedProperty(value = "#{systemMessageService}")
    SystemMessageService systemMessageService;

    @ManagedProperty(value = "#{securityBean}")
    SecurityBean securityBean;

    @ManagedProperty(value = "#{systemMessageReceiverService}")
    SystemMessageReceiverService systemMessageReceiverService;

    @ManagedProperty(value = "#{systemMessageAnswerService}")
    SystemMessageAnswerService systemMessageAnswerService;

    private SystemMessage systemMessage = new SystemMessage();

    private SystemMessageAnswer systemMessageAnswer = new SystemMessageAnswer();

    private SystemMessageReceiver systemMessageReceiver = new SystemMessageReceiver();

    private User[] receiverList;
    private boolean dummy;


    public void prepareToEdit(){
        systemMessage = systemMessageService.findById(systemMessage.getId());
    }

    public void prepareToSendMessage(){
        systemMessage = new SystemMessage();
        receiverList = null ;

    }

    public void sendMessage(){
        if(Util.isNotNull(systemMessage.getTitle())){
            boolean success = false;
            systemMessageAnswer.setUser(securityBean.getUser());
            systemMessage.getSystemMessageAnswerList().add(systemMessageAnswer);
            systemMessage.setUserSender(securityBean.getUser());
            systemMessageAnswer.setSystemMessage(systemMessage);
            if(!systemMessage.isSendAll()){
                addMessageReceiver();   
            }


            systemMessage = systemMessageService.save(systemMessage);

            systemMessageAnswer = new SystemMessageAnswer();

            success = true;
            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, FacesUtils.getMessageByKey("systemmessage.send.success"), FacesUtils.getMessageByKey("systemmessage.send.success"));
            FacesContext.getCurrentInstance().addMessage("", message);
            RequestContext context = RequestContext.getCurrentInstance();
            context.addCallbackParam("success", success);
        }
        else{
            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, FacesUtils.getMessageByKey("systemmessage.null.title"), FacesUtils.getMessageByKey("systemmessage.null.title"));
            FacesContext.getCurrentInstance().addMessage("", message);
        }
    }

    public void setRead(SystemMessage message){
        message.setReaded(true);
        systemMessageService.save(message);
    }


    public void addMessageReceiver(){
        for(User user : receiverList){
            SystemMessageReceiver messageReceiver = new SystemMessageReceiver();
            messageReceiver.setReceiver(user);
            messageReceiver.setSystemMessage(systemMessage);
            messageReceiver.setReaded(false);
            systemMessage.getSystemMessageReceiverList().add(messageReceiver);
        }

    }

    public void deleteMessage(){
        boolean success = false;
        systemMessageService.delete(systemMessageService.findById(systemMessage.getId()));

        success = true;
        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, FacesUtils.getMessageByKey("systemmessage.delete.success"), FacesUtils.getMessageByKey("systemmessage.delete.success"));
        FacesContext.getCurrentInstance().addMessage("", message);
        RequestContext context = RequestContext.getCurrentInstance();
        context.addCallbackParam("success", success);
    }
    public void sendMessageAnswer(){
        systemMessageAnswer.setUser(securityBean.getUser());
        systemMessageAnswer.setSystemMessage(systemMessage);
        systemMessageAnswerService.save(systemMessageAnswer);

        if(!systemMessage.isSendAll()){
            systemMessage.setSystemMessageReceiverList(systemMessageService.getReceiverListOfMessage(systemMessage));
            for(SystemMessageReceiver systemMessageReceiver : systemMessage.getSystemMessageReceiverList()){
                if(!systemMessageReceiver.getReceiver().getId().equals(securityBean.getUser().getId())){
                    systemMessageReceiver.setReaded(false);
                    systemMessageReceiver.setShowed(false);
                    systemMessageReceiverService.save(systemMessageReceiver);
                }
            }
        }

        systemMessage.getSystemMessageAnswerList().add(systemMessageAnswer);

        systemMessageAnswer = new SystemMessageAnswer();
        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, FacesUtils.getMessageByKey("systemmessage.send.success"), FacesUtils.getMessageByKey("systemmessage.send.success"));
        FacesContext.getCurrentInstance().addMessage("", message);
        RequestContext context = RequestContext.getCurrentInstance();
        context.addCallbackParam("success", true);
    }



    public SystemMessageService getSystemMessageService() {
        return systemMessageService;
    }

    public void setSystemMessageService(SystemMessageService systemMessageService) {
        this.systemMessageService = systemMessageService;
    }

    public SystemMessage getSystemMessage() {
        return systemMessage;
    }

    public void setSystemMessage(SystemMessage systemMessage) {
        ArrayList<String> fetchedAttributes = new ArrayList<String>();
        fetchedAttributes.add("systemMessageAnswerList");
        this.systemMessage = systemMessageService.loadWithFetchedAttributes(systemMessage.getId(),fetchedAttributes);
    }

    public SystemMessageAnswer getSystemMessageAnswer() {
        return systemMessageAnswer;
    }

    public void setSystemMessageAnswer(SystemMessageAnswer systemMessageAnswer) {
        this.systemMessageAnswer = systemMessageAnswer;
    }
    public SecurityBean getSecurityBean() {
        return securityBean;
    }
    public void setSecurityBean(SecurityBean securityBean) {
        this.securityBean = securityBean;
    }
    public SystemMessageReceiverService getSystemMessageReceiverService() {
        return systemMessageReceiverService;
    }
    public void setSystemMessageReceiverService(
            SystemMessageReceiverService systemMessageReceiverService) {
        this.systemMessageReceiverService = systemMessageReceiverService;
    }
    public SystemMessageAnswerService getSystemMessageAnswerService() {
        return systemMessageAnswerService;
    }
    public void setSystemMessageAnswerService(
            SystemMessageAnswerService systemMessageAnswerService) {
        this.systemMessageAnswerService = systemMessageAnswerService;
    }
    public SystemMessageReceiver getSystemMessageReceiver() {
        return systemMessageReceiver;
    }
    public void setSystemMessageReceiver(SystemMessageReceiver systemMessageReceiver) {
        this.systemMessageReceiver = systemMessageReceiver;
    }
    public User[] getReceiverList() {
        return receiverList;
    }
    public void setReceiverList(User[] receiverList) {
        this.receiverList = receiverList;
    }

@ManagedBean（name=“systemMessageEditController”）
@视域
公共类SystemMessageEditController{
@ManagedProperty（value=“#{systemMessageService}”）
系统消息服务系统消息服务；
@ManagedProperty（value=“#{securityBean}”）
SecurityBean SecurityBean；
@ManagedProperty（value=“#{systemMessageReceiverService}”）
SystemMessageReceiverService SystemMessageReceiverService；
@ManagedProperty（value=“#{systemMessageAnswerService}”）
系统消息应答服务系统消息应答服务；
私有SystemMessage SystemMessage=新SystemMessage（）；
私有SystemMessageAnswer SystemMessageAnswer=新SystemMessageAnswer（）；
私有SystemMessageReceiver SystemMessageReceiver=新SystemMessageReceiver（）；
私人用户[]接收人名单；
私有布尔伪；
public void prepareToEdit（）{
systemMessage=systemMessageService.findById（systemMessage.getId（））；
}
public void prepareToSendMessage（）{
systemMessage=新的systemMessage（）；
接收方列表=空；
}
公共无效发送消息（）{
if（Util.isNotNull（systemMessage.getTitle（）））{
布尔成功=假；
systemMessageAnswer.setUser（securityBean.getUser（））；
systemMessage.getSystemMessageAnswerList（）.add（systemMessageAnswer）；
setUserSender（securityBean.getUser（））；
systemMessageAnswer.setSystemMessage（系统消息）；
如果（！systemMessage.isSendAll（））{
addMessageReceiver（）；
}
systemMessage=systemMessageService.save（systemMessage）；
systemMessageAnswer=新的systemMessageAnswer（）；
成功=真实；
FacesMessage=新的FacesMessage（FacesMessage.SEVERITY_信息，FacesUtils.getMessageByKey（“systemmessage.send.success”）、FacesUtils.getMessageByKey（“systemmessage.send.success”）；
FacesContext.getCurrentInstance（）.addMessage（“，message”）；
RequestContext=RequestContext.getCurrentInstance（）；
addCallbackParam（“success”，success）；
}
否则{
FacesMessage=新的FacesMessage（FacesMessage.SEVERITY_信息，FacesUtils.getMessageByKey（“systemmessage.null.title”）、FacesUtils.getMessageByKey（“systemmessage.null.title”）；
FacesContext.getCurrentInstance（）.addMessage（“，message”）；
}
}
public void setRead（系统消息）{
message.setReaded（true）；
systemMessageService.save（消息）；
}
public void addMessageReceiver（）{
用于（用户：接收方列表）{
SystemMessageReceiver messageReceiver=新的SystemMessageReceiver（）；
messageReceiver.setReceiver（用户）；
messageReceiver.setSystemMessage（系统消息）；
messageReceiver.setReaded（false）；
systemMessage.getSystemMessageReceiverList（）.add（messageReceiver）；
}
}
公共void deleteMessage（）{
布尔成功=假；
systemMessageService.delete（systemMessageService.findById（systemMessage.getId（））；
成功=真实；
FacesMessage=新的FacesMessage（FacesMessage.SEVERITY_信息，FacesUtils.getMessageByKey（“systemmessage.delete.success”）、FacesUtils.getMessageByKey（“systemmessage.delete.success”）；
FacesContext.getCurrentInstance（）.addMessage（“，message”）；
RequestContext=RequestContext.getCurrentInstance（）；
addCallbackParam（“success”，success）；
}
public void sendMessageAnswer（）{
systemMessageAnswer.setUser（securityBean.getUser（））；
systemMessageAnswer.setSystemMessage（系统消息）；
systemMessageAnswerService.save（systemMessageAnswer）；
如果（！systemMessage.isSendAll（））{
systemMessage.setSystemMessageReceiverList（systemMessageService.getReceiverListOfMessage（systemMessage））；
对于（SystemMessageReceiver SystemMessageReceiver:systemMessage.getSystemMessageReceiverList（））{
如果（！systemMessageReceiver.getReceiver（）.getId（）.equals（securityBean.getUser（）.getId（）））{
systemMessageReceiver.setReaded（false）；
systemMessageReceiver.setShowed（假）；
systemMessageReceiverService.save（systemMessageReceiver）；
}
}
}
systemMessage.getSystemMessageAnswerList（）.add（systemMessageAnswer）；
systemMessageAnswer=新的systemMessageAnswer（）；
FacesMessage=新的FacesMessage（FacesMessage.SEVERITY_信息，FacesUtils.getMessageByKey（“systemmessage.send.success”）、FacesUtils.getMessageByKey（“systemmessage.send.success”）；
FacesContext.getCurrentInstance（）.addMessage（“，message”）；
RequestContext=RequestContext.getCurrentInstance（）；
addCallbackParam（“success”，true）；
}
公共系统消息服务getSystemMessageService（）{
返回系统消息服务