Primefaces selectOneListbox不显示项目文本(项目中也不包含数据)

我的PrimeFaces selectOneListbox中有3000个项目,这可以从chrome调试器中的对象检查器中看到。div行都在那里,但其中没有用于显示文本的数据。div都是空的。

我反复检查,itemValue指向其中包含数据的company.name。此外,itemLabel获取公司的唯一符号,因此也可以,因为这些数据都是有效的。然而,我遗漏了一些东西,因为UI显示一个空白框,明显高于其默认的空框——正如我所说,在chrome的调试器中以空div的形式包含3000个空项。

下面是我的列表框中的SelectOneXHTML代码。我在托管bean中尝试将映射作为集合和列表(因此我将值更改为我想要尝试的变量)。地图和公司列表都产生了相同的结果——javascript中包含3000个条目的列表(如下所示)

<p:selectOneListbox id="symbolPicker" value="#{simulationBean.company}" converter="companyConverter" var="t" filter="true" filterMatchMode="contains">
    <f:selectItems value="#{simulationBean.companyMap}" var="company" itemLabel="#{company.symbol}" itemValue="#{company}" />
</p:selectOneListbox>                                   

托管bean只存储一个公司列表,这些公司显然都是在@PostConstruct初始化的,因为在我的调试器中枚举了对象(3000个),所以这些公司在那里,它们的数据是有效的(我可以在调试器中看到数据)。

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Transient;

import com.google.gson.JsonObject;

@Entity
@Table(name = "company")
public class Company implements Serializable {

    private static final long serialVersionUID = 1L;

    private String symbol;

    @Column
    private String name;

    @Column(columnDefinition="market_category")
    private String marketCategory;

    @Column(columnDefinition="test_issue")
    private Integer testIssue;

    @Column(columnDefinition="good_status")
    private Integer goodStatus;

    @Column(columnDefinition="round_lot")
    private Integer roundLot;

    @Column
    private Integer etf;

    public Company() {}

    public Company(String symbol, String name, String marketCategory, Integer testIssue, Integer goodStatus, Integer roundLot, Integer etf) {
        super();
        this.symbol = symbol;
        this.name = name;
        this.marketCategory = marketCategory;
        this.testIssue = testIssue;
        this.goodStatus = goodStatus;
        this.roundLot = roundLot;
        this.etf = etf;
    }

    @Id
    public String getSymbol() {
        return symbol;
    }

    public void setSymbol(String symbol) {
        this.symbol = symbol;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMarketCategory() {
        return marketCategory;
    }

    public void setMarketCategory(String marketCategory) {
        this.marketCategory = marketCategory;
    }

    public Integer getTestIssue() {
        return testIssue;
    }

    public void setTestIssue(Integer testIssue) {
        this.testIssue = testIssue;
    }

    public Integer getGoodStatus() {
        return goodStatus;
    }

    public void setGoodStatus(Integer goodStatus) {
        this.goodStatus = goodStatus;
    }

    public Integer getRoundLot() {
        return roundLot;
    }

    public void setRoundLot(Integer roundLot) {
        this.roundLot = roundLot;
    }

    public Integer getEtf() {
        return etf;
    }

    public void setEtf(Integer etf) {
        this.etf = etf;
    }

    @Override
    public String toString() {
        return symbol;
    }

    public String toDebugString() {
        return "Company [symbol=" + symbol + ", name=" + name + ", marketCategory=" + marketCategory + ", testIssue="
                + testIssue + ", goodStatus=" + goodStatus + ", roundLot=" + roundLot + ", etf=" + etf + "]";
    }

    @Transient
    public JsonObject getJsonObject() {

        JsonObject result = new JsonObject();

        result.addProperty("symbol", symbol);
        result.addProperty("name", name);
        result.addProperty("marketCategory", marketCategory);
        result.addProperty("testIssue", testIssue);
        result.addProperty("goodStatus", goodStatus);
        result.addProperty("roundLot", roundLot);
        result.addProperty("etf", etf);
        return result;
    }

    @Override
    public boolean equals(Object obj) {

        // null check
        if (obj == null) {
            return false;
        }

        // this instance check
        if (this == obj) {
            return true;
        }

        // instanceof Check and actual value check
        if ((obj instanceof Company) && (((Company) obj).getSymbol() == this.symbol)) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {

        return symbol.hashCode();
    }
}

现在我还有一个转换器:

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;

import com.appzany.stockService.BeanUtil;
import com.appzany.stockService.entity.Company;
import com.appzany.stockService.stockservice.StockService;

@FacesConverter("companyConverter")
public class CompanyConverter implements Converter {

    private StockService stockService = null;

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value) {

        if(stockService == null)
            stockService = BeanUtil.getBean(StockService.class);
        return stockService.getCompany(value);
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value) {
        return ((Company)value).getSymbol();
    }
}