Jsf 拾取列表面不工作

我尝试使用Primefaces的pickList组件。我的转换器不能正常工作，我不知道为什么

这是我的ManagedBean：

@ManagedBean(name = "comMB")
@SessionScoped
public class TeamCompetitionBean implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    private DualListModel<Team> teams;
    List<Team> source;
    List<Team> source1;
    List<Team> target;

    @ManagedProperty("#{team}")
    private TeamServiceI teamService;

    List<String> teamNameList ;

    // public TeamCompetitionBean() {

    public DualListModel<Team> getTeams() {

        // Players
        teamNameList = new ArrayList<String>();
        source = new ArrayList<Team>();
        target = new ArrayList<Team>();

        source.addAll(getTeamService().getTeam());

        teams = new DualListModel<Team>(source, target);
        return teams;

    }

    public void setTeams(DualListModel<Team> teams) {
        this.teams = teams;
    }

    public void onTransfer(TransferEvent event) {
        StringBuilder builder = new StringBuilder();
        for (Object item : event.getItems()) {
            builder.append(((Team) item).getTeamName()).append("<br />");
        }

        FacesMessage msg = new FacesMessage();
        msg.setSeverity(FacesMessage.SEVERITY_INFO);
        msg.setSummary("Items Transferred");
        msg.setDetail(builder.toString());

        FacesContext.getCurrentInstance().addMessage(null, msg);
    }

    public TeamServiceI getTeamService() {
        return teamService;
    }

    public void setTeamService(TeamServiceI teamService) {
        this.teamService = teamService;
    }

    public List<Team> getSource() {

        return source;
    }

    public void setSource(List<Team> source) {
        this.source = source;
    }

    public List<Team> getTarget() {
        return target;
    }

    public void setTarget(List<Team> target) {
        this.target = target;
    }


    public void afficher(){
        System.out.println(target);
        System.out.println(source);
    }

}

现在，这是我的自定义转换器：

@FacesConverter(forClass = Team.class, value = "teamConverter")
public class TeamConverter implements Converter {


    Team team;

    public Object getAsObject(FacesContext facesContext, UIComponent component,
            String value) {

        System.out.println("hello object");

        if (value == null || value.length() == 0) {
            return null;
        }
        ApplicationContext ctx = FacesContextUtils
                .getWebApplicationContext(FacesContext.getCurrentInstance());
        TeamBean controller = (TeamBean) ctx.getBean("teamMB");

        List<Team> liststagiaire = controller.getTeamList();

        for (int i = 0; i < liststagiaire.size(); i++)

        {
            team = liststagiaire.get(i);
            if (team.getIdTeam() == getKey(value)) {
                break;
            }

        }

        return team;
    }

    java.lang.Integer getKey(String value) {
        java.lang.Integer key;
        key = Integer.valueOf(value);
        return key;
    }

    String getStringKey(java.lang.Integer value) {
        StringBuffer sb = new StringBuffer();
        sb.append(value);
        return sb.toString();
    }

    public String getAsString(FacesContext facesContext, UIComponent component,
            Object object) {

        System.out.println("hello string");

        if (object == null) {
            System.out.println("hello string null");
            return null;
        }
        if (object instanceof Team) {
            System.out.println("hello string intance of");
            Team o = (Team) object;
            String i = getStringKey(o.getIdTeam());

            return i;
        } else {
            System.out.println("hello throw");
            throw new IllegalArgumentException("object " + object
                    + " is of type " + object.getClass().getName()
                    + "; expected type: " + Team.class.getName());
        }
    }

}

@facescoverter（forClass=Team.class，value=“teamConverter”）
公共类TeamConverter实现转换器{
团队；
公共对象getAsObject（FacesContext FacesContext、UIComponent组件、，
字符串值）{
System.out.println（“hello对象”）；
if（value==null | | value.length（）==0）{
返回null；
}
ApplicationContext ctx=面上下文
.getWebApplicationContext（FacesContext.getCurrentInstance（））；
TeamBean控制器=（TeamBean）ctx.getBean（“teamMB”）；
List liststagiaire=controller.getTeamList（）；
对于（int i=0；i

最后这是我的XHTML页面：

<p:pickList id="teamPickList" value="#{comMB.teams}" var="team"
            itemValue="#{team}" itemLabel="#{team}" converter="teamConverter">          
        </p:pickList>

---

您的问题来自这一行（在您的班级TeamConverter）：

你不能比较像那样的

Integer

对象，因为这样做是在比较。您应该将这一行替换为

if (team.getIdTeam().intValue() == getKey(value).intValue()) {

你在班上有同样的问题团队：

if (team.getIdTeam() == getKey(value)) {

return (this.idTeam == f.getIdTeam());

应替换为：

return (this.idTeam.intValue() == f.getIdTeam().intValue());

不相关：

您不需要使用

getKey

和

getStringKey

，您可以这样简单地替换它们：

getKey(value)  // this

Integer.valueOf(value)  // by this

及

---

此外，在您的视图中，您应该将

itemlab=“#{team}”

替换为

itemlab=“#{team.teamName}”

。

什么是“我的转换器工作不正常”？没有人打电话？它是否返回错误的值？

List teamNameList

何时初始化？我看不出来。与问题无关，但您可以替换

String I=getStringKey（o.getIdTeam（））由
String i=o.getIdTeam（）.toString（）teamserviceinpl
类。我已经按照你的建议编辑了我的代码……但问题仍然没有解决。这是堆栈跟踪中的异常：java.lang.IllegalArgumentException:object com.arobase.service.Impl。TeamServiceImpl@58e99405类型为com.sun.proxy.$Proxy863；预期类型：com.arobase.model.Team，位于com.arobase.managed.bean.TeamConverter.getAsString（TeamConverter.java:79）@用户2436180您是否尝试删除团队验证的
实例？当我删除它时，异常变成：java.lang.ClassCastException:com.sun.proxy。$Proxy176无法在com.arobase.managed.bean.TeamConverter.getAsString（TeamConverter.java:73）处强制转换到com.arobase.model.Team
getKey(value)  // this

Integer.valueOf(value)  // by this

getStringKey(o.getIdTeam()) // this

o.getIdTeam().toString() // by this