Question

我正在开发一个公开Web服务的Java Web应用程序。此Web服务在同一个tomcat服务器上远程调用另外两个java Web服务。如果我尝试从其他两个服务调用方法，我会得到一堆错误，导致自动生成的代码中出现NoSuchMethodError。我使用的是Netbeans 6.9，sun java 1.6和apache tomcat 6.0.26。我单独测试了Web服务，它们工作正常。

感谢您的时间。

让我更具体一点

我有RecommendationWeb Web应用程序和RecommendationManager Web服务：

@WebService()
public class RecommendationManager {
    public ArrayList<Long> getRecommendation(long userId, int NumOfRecommendations) {
        List<RecommendedItem> recommendations = this.myHModel.getRecommendations(userId, NumOfRecommendations);
        ArrayList<Long> result = new ArrayList<Long>();
        Iterator itr = recommendations.iterator();
        while(itr.hasNext()) {
            RecommendedItem recItem = (RecommendedItem) itr.next();
            result.add(new Long(recItem.getItemID()));
        }
        return result;
    }
}

以及带有ETL_WS Web服务的ETL_Procedures Web应用程序：

@WebService()
public class ETL_WS {
    public ArrayList<Long> getCorrespondingActiveCouponsForRecommendation(ArrayList<Long> itemCategories, int numOfRecoms) {
    int sumOfAllRecommendedCategories = 0;
    Iterator itr = itemCategories.iterator();
    ArrayList<Coupon> coupons = new ArrayList<Coupon>();
    ArrayList<Long> recommendedCoupons = new ArrayList<Long>();
    HashMap productOccurences = new HashMap();
    while(itr.hasNext()) {
        Long item = (Long) itr.next();
        int val = 0;
        ArrayList<Coupon> temp = (ArrayList<Coupon>) couponMap.getCoupon(item);
        if(temp != null) {
            Iterator itr_a = temp.iterator();
            while(itr_a.hasNext()) {
                val += 1;
                sumOfAllRecommendedCategories += 1;
                Coupon tmp_coupon = (Coupon) itr_a.next();
                if(tmp_coupon.isActive())
                    coupons.add(tmp_coupon);
            }
            productOccurences.put(item, new Integer(val));
        }
    }
    long currentCat = coupons.get(0).getItem_id();
    int categoryRecs = 0;
    Integer currentOccurence = (Integer) productOccurences.get(new Long(currentCat));
    int maxCategoryItems = (currentOccurence.intValue()/sumOfAllRecommendedCategories);
    int tempRecItems = 0;
    int listIndex = 0;
    while(tempRecItems < numOfRecoms && listIndex < coupons.size()) {
        if(categoryRecs < maxCategoryItems && currentCat == coupons.get(listIndex).getItem_id()) {
            recommendedCoupons.add(coupons.get(listIndex).getItem_id());
            listIndex += 1;
            tempRecItems += 1;
            categoryRecs += 1;
        }else if(categoryRecs < maxCategoryItems && currentCat != coupons.get(listIndex).getItem_id()) {
            recommendedCoupons.add(coupons.get(listIndex).getItem_id());
            currentCat = coupons.get(listIndex).getItem_id();
            currentOccurence = (Integer) productOccurences.get(new Long(currentCat));
            maxCategoryItems = (currentOccurence.intValue()/sumOfAllRecommendedCategories);
            categoryRecs = 1;
            listIndex += 1;
            tempRecItems += 1;
        }else {
            recommendedCoupons.add(coupons.get(listIndex).getItem_id());
            currentCat = coupons.get(listIndex).getItem_id();
            currentOccurence = (Integer) productOccurences.get(new Long(currentCat));
            maxCategoryItems = (currentOccurence.intValue()/sumOfAllRecommendedCategories);
            categoryRecs = 1;
            listIndex += 1;
            tempRecItems += 1;
        }
    }

    return recommendedCoupons;
}
}

这两个方法在INTERFACE_LAYER Web服务的Recommended_Interface Web应用程序中调用：

@WebService()
public class INTERFACE_LAYER {
    public ArrayList<Long> requestRecommendation(long userID, int noOfRecoms) {
    ArrayList<Long> recommendedCoupons = null;
    ArrayList<Long> recommendedItems = (ArrayList<Long>) getRecommendation(userID, noOfRecoms);
        recommendedCoupons = (ArrayList<Long>) getCorrespondingActiveCouponsForRecommendation(recommendedItems, noOfRecoms);
    return recommendedCoupons;
}

private static java.util.List<java.lang.Long> getRecommendation(long arg0, int arg1) {
    ws.recommender.RecommendationManagerService service = new ws.recommender.RecommendationManagerService();
    ws.recommender.RecommendationManager port = service.getRecommendationManagerPort();
    return port.getRecommendation(arg0, arg1);
}

private static java.util.List<java.lang.Long> getCorrespondingActiveCouponsForRecommendation(java.util.List<java.lang.Long> arg0, int arg1) {
    ws.etl.ETLWSService service = new ws.etl.ETLWSService();
    ws.etl.ETLWS port = service.getETLWSPort();
    return port.getCorrespondingActiveCouponsForRecommendation(arg0, arg1);
}
}

Answer 1

不工作的原因是Web Service的方法ArrayList的返回值。当我把它改成String时，它起作用了。

来自Web服务方法的tomcat6 Web服务调用方法

1 个答案: