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我正在学习如何使用SQLData，并且在投射回我的对象​​时遇到问题。

我的Oracle类型看起来像这样：

CREATE OR REPLACE TYPE activities_t AS OBJECT
(
   list   activity_list_t;
);

CREATE OR REPLACE TYPE activity_list_t AS TABLE OF activity_t;

CREATE OR REPLACE TYPE activity_t AS OBJECT
(
   startDate  DATE;
   endDate    DATE;
);

我的Java看起来像这样：

public class Activities implements SQLData {
    private String sqlType = "ACTIVITIES_T";
    List<Activity> list;

    // must have default ctor!
    public Activities() {
    }

    public String getSQLTypeName() throws SQLException
    { 
        return sqlType; 
    }

    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list …