Question

我试图一次向MongoDB插入多条记录，所以为此我为每个要插入的记录创建了一个javaBean并将它们添加到ArrayList。

最后从ArrayList，我正在尝试执行插入操作，如下所示

public void insert(ArrayList<QuoteReportBean> quotelist) {
     BasicDBList totalrecords = new BasicDBList();
    StringBuffer sb = new StringBuffer();
    int valuecount=0;
     for (QuoteReportBean reportbean: quotelist) {
         valuecount++;
            BasicDBObject dbrecord = new BasicDBObject();
            dbrecord.append("cust_id", reportbean.getCustomerId());
            dbrecord.append("unique_symbol", reportbean.getUniqueSymbol());
            sb.append(reportbean.getUniqueSymbol()+",");
            dbrecord.append("exch", reportbean.getExchange());
            dbrecord.append("access_time", reportbean.getDate());
            totalrecords.add(dbrecord);
          }
     WriteResult result = coll.insert(totalrecords,WriteConcern.NORMAL);
}

但我是以下错误

Exception in thread "taskExecutor-1" java.lang.IllegalArgumentException: BasicBSONList can only work with numeric keys, not: [_id]
        at org.bson.types.BasicBSONList._getInt(BasicBSONList.java:159)
        at org.bson.types.BasicBSONList._getInt(BasicBSONList.java:150)
        at org.bson.types.BasicBSONList.get(BasicBSONList.java:104)
        at com.mongodb.DBCollection.apply(DBCollection.java:501)
        at com.mongodb.DBCollection.apply(DBCollection.java:491)
        at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:195)
        at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:180)
        at com.mongodb.DBCollection.insert(DBCollection.java:58)

有人可以帮我解决这个问题吗？

Answer 1

BasicDBList不能用于插入多个文档，它只用于单个文档中的数组。要进行批量插入，需要将DBObject数组传递给insert方法。

我更改了你的代码来执行此操作，并且它没有错误地工作：

    StringBuffer sb = new StringBuffer();
    int valuecount = 0;
    final QuoteReportBean[] quotelist = {new QuoteReportBean()};
    DBObject[] totalrecords = new BasicDBObject[quotelist.length];
    for (int i = 0; i < quotelist.length; i++) {
        QuoteReportBean reportbean = quotelist[i];
        valuecount++;
        BasicDBObject dbrecord = new BasicDBObject();
        dbrecord.append("cust_id", reportbean.getCustomerId());
        dbrecord.append("unique_symbol", reportbean.getUniqueSymbol());
        sb.append(reportbean.getUniqueSymbol() + ",");
        dbrecord.append("exch", reportbean.getExchange());
        dbrecord.append("access_time", reportbean.getDate());
        totalrecords[i] = dbrecord;
    }
    WriteResult result = coll.insert(totalrecords, WriteConcern.NORMAL);

BasicBSONList只能使用数字键，而不是：[_ id]

1 个答案: