Java JsonMappingException:（was NullPointerException）（通过引用链：com.domain.ProfitStrategyInputMsg[“productBasicInfo”]）

org.codehaus.jackson.map.JsonMappingException:（是 java.lang.NullPointerException）（通过引用链： com.domain.profit.ProfitStrategyInputMsg[“productBasicInfo”]）

公共列表buiInputParams（）{
字符串paramStragetyA="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和qntq1laogicagicagicagicagicagicjimjvb2tdaxr5ijogwgicagicagicagicgicgicjaigicagicagicagicagicgicjagicagicagicagicgicgicgicjagicagicagicjagicagicgicgicgicagicgicgicgicjjjjjjjjjjjjjjjjjjjjjjjjjjGICAGICAGICAGICAGICAGIGIGIGIJIWMTUTMDKTUILAOGICAGICAGICAGICAGICAGICYMDE5LTA2IIWKICAGICAGICAGIGICAGIMJAXNS0xMC0WN SIKICAGICAGICAGICAGIGIGIGIF0SCIAGICAGICAGICAGICAGICAGICHVZHVJDFR5GUIOAYLAGICAGICAGICAGINYNZZWZZZWIAQOICAGICAGICAGICAGICAGIN1YLYL2YL5YLZENZSYNZZZZWIZWIZWIZWIZWIZWIIcagicAgIzdGluyxRpB25DbGfZcYI6IdeSciagicAgIzGluyxRpB25Db2lIlijomqogicagicGb9LaogicagicGb7CiagicAgicagicAgizVj1bGvTawHzI6IdeSciagicagicAgizVj1bGvFzVj1bgVFbGvTzW50IjOgMy4yGyGagicAgi2Y2Y2RjZcI4YZcIdZcGyGyZcgI6IdGyZcgIdGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyGyCAGICAGICJIB29RQ2L0ESI6IFSKICAGICAGICAGICAGICAGIMCMWIIWKICAGICAGICAGICAGICAGICAGICAGICAGIMCJZXBHCNR1CMVEYXRLIJOWWIGICAGICAGICAGICAGICAGICAGICAGICAGICAGICAGIMCYMDEaginbyb2r1y3ruexblijogmiwkigicagicagicagicagicjdbgfzc0lkijogmswkicagicagicagicjdwqcmrdbgfzc0lkijogmswkicagicagicagicagicagicjicmfr5guioiaxlaogicagicagicagicagic3rpbmf0aw9uqxxc3mioxicagicagicagicagic3rpbmf0aw9uq9kzsi6idekicagicagicagicagicagic0kicagic0kicagic0kicagic0kc0kqq=”；
List params=JsonUtil.toList(
新字符串（Base64.decodeBase64（paramStragetyA.getBytes（））），ProfitStrategyInputMsg.class）；//异常抛出原因？？？
System.out.println（JsonUtil.toString（params））；
返回参数；
}
公共类利润策略{
私人int coverFlag；
私有列表productBasicInfo；
public int getCoverFlag（）{
返回标志；
}
公共无效setCoverFlag（int coverFlag）{
this.coverFlag=coverFlag；
}
公共列表getProductBasicInfo（）{
返回productBasicInfo；
}
public void setProductBasicInfo（列出productBasicInfo）{
this.productBasicInfo=productBasicInfo；
}}

我该如何解决这个问题？有人能帮我吗{

public class ProductBasicInfo {

    private int productId;

    private List<Integer> bookCities;

    private int departureCity;

    @JsonSerialize(using = DateJsonSerializer.class)
    @JsonDeserialize(using = DateJsonDeserializer.class)
    private List<Date> departureDate;
}

私有int-productId； 私人书城名单； 私人部门； @JsonSerialize（使用=DateJsonSerializer.class） @JsonDeserialize（使用=DateJsonDeserializer.class） 私人名单出发日期； } 改变

public class ProductBasicInfo {

    private int productId;

    private List<Integer> bookCities;

    private int departureCity;

    private List<Date> departureDate;
}

公共类ProductBasicInfo{
私有int-productId；
私人书城名单；
私人部门；
私人名单出发日期；
}

这是一个答案吗？实际上，该问题没有原始的

类ProductBasicInfo声明。

可能应该添加到问题中。

public class ProductBasicInfo {

    private int productId;

    private List<Integer> bookCities;

    private int departureCity;

    private List<Date> departureDate;
}