如果需要在不使用java.util.map的情况下创建可序列化的键值映射，请使用我的解决方法继续运行到NullPointerException

我正在尝试使用OracleAS web服务使用第三方web服务。我试图调用的操作请求一个java.util.Map作为其输入参数之一。它期待着这样的结构：

<in1>
    <!--Zero or more repetitions:-->
    <item>
        <key>?</key>
        <value>?</value>
    </item>
</in1>

CustomItem类

public class CreateStructure {
    public static void main(String[] args) {
       CustomItem inputParamMap = new CustomItem(2);
       inputParamMap.setItem("HireDate", "2011-12-31", 0);
       inputParamMap.setItem("status", "Hired", 1);

    }
}

public class CustomItem implements java.io.Serializable {
    protected JAXRpcMapEntry[] item;

        //Constructor
    public CustomItem(int index) {
        item = new JAXRpcMapEntry[index];
    }

        //methods
    public JAXRpcMapEntry[] getItem() {
        return item;
    }

    public void setItem(JAXRpcMapEntry[] item) {
        this.item = item;
    }

    public void setItem(java.lang.Object key, java.lang.Object value, int index) {
        this.item[index].setKey((String)key);
        this.item[index].setValue((String)value);
    }

    public JAXRpcMapEntry[] getItem(int index) {
        return this.getItem(index);
    }
}

public class JAXRpcMapEntry
        implements java.io.Serializable
{
        //
        // Constructors
        //
        public JAXRpcMapEntry() { }

        public JAXRpcMapEntry(java.lang.Object p1, java.lang.Object p2) { }

        //
        // Fields
        //
        private java.lang.Object key;

        private java.lang.Object value;

        //
        // Methods
        //
        public java.lang.Object getKey() {
            return this.key;
        }

        public void setKey(java.lang.Object p1) { }

        public java.lang.Object getValue() {
            return this.value;
        }

        public void setValue(java.lang.Object p1) { }

        public boolean equals(java.lang.Object p1) {
            if(this.equals(p1)){
                return true;
            }
            else
            {
                return false;
            }
        }
}

jaxrpcmpentry类

public class CreateStructure {
    public static void main(String[] args) {
       CustomItem inputParamMap = new CustomItem(2);
       inputParamMap.setItem("HireDate", "2011-12-31", 0);
       inputParamMap.setItem("status", "Hired", 1);

    }
}

public class CustomItem implements java.io.Serializable {
    protected JAXRpcMapEntry[] item;

        //Constructor
    public CustomItem(int index) {
        item = new JAXRpcMapEntry[index];
    }

        //methods
    public JAXRpcMapEntry[] getItem() {
        return item;
    }

    public void setItem(JAXRpcMapEntry[] item) {
        this.item = item;
    }

    public void setItem(java.lang.Object key, java.lang.Object value, int index) {
        this.item[index].setKey((String)key);
        this.item[index].setValue((String)value);
    }

    public JAXRpcMapEntry[] getItem(int index) {
        return this.getItem(index);
    }
}

public class JAXRpcMapEntry
        implements java.io.Serializable
{
        //
        // Constructors
        //
        public JAXRpcMapEntry() { }

        public JAXRpcMapEntry(java.lang.Object p1, java.lang.Object p2) { }

        //
        // Fields
        //
        private java.lang.Object key;

        private java.lang.Object value;

        //
        // Methods
        //
        public java.lang.Object getKey() {
            return this.key;
        }

        public void setKey(java.lang.Object p1) { }

        public java.lang.Object getValue() {
            return this.value;
        }

        public void setValue(java.lang.Object p1) { }

        public boolean equals(java.lang.Object p1) {
            if(this.equals(p1)){
                return true;
            }
            else
            {
                return false;
            }
        }
}

---

获取空指针异常的原因是数组中的元素未初始化。换句话说，您正在将key和value设置为null对象。快速解决办法是：

public void setItem(java.lang.Object key, java.lang.Object value, int index) {
   this.item[index] = new JAXRpcMapEntry(key, value);
}

---

你是我周五下午的英雄！非常好，谢谢你的帮助。