我使用ajax时不显示消息

Question

我想在数据表中的行编辑上调用此方法后显示成功消息，但它没有显示给我。请帮助

  public String onRowEdit(RowEditEvent event) {
             FacesMessage msg = new FacesMessage(((SearchMaintenanceFields) event.getObject()).getFieldName(), "has been updated Successfully");
             FacesContext.getCurrentInstance().addMessage(null, msg);
             setUpdateFlag(true); 
             return "searchMaintenance.xhtml?faces-redirect=true";
        }

<p:ajax event="rowEdit" onstart="PF('dlg').show();" oncomplete="PF('dlg').hide();" listener="#{vaultSearchMaintenanceFields.onRowEdit}"
  update="fieldListTable" />

我保留此ajax调用的数据表的fieldListTable id

Answer 1

此代码对我有用：

public void addMessage(String summary, FacesMessage.Severity severity) {
    FacesMessage message = new FacesMessage(severity, summary, null);
    FacesContext.getCurrentInstance().addMessage(null, message);
}