Java中为Google Analytics API的RunReportRequest声明OrderBys

只需正确构建OrderBy对象即可实现按date维度升序排序，具体修改如下：

修正后的排序逻辑代码 #

List<OrderBy> orderBys = new ArrayList<OrderBy>() {{
    // 按date维度升序排序
    add(OrderBy.newBuilder()
            .setDimension(OrderBy.DimensionOrderBy.newBuilder()
                    .setDimensionName("date")
                    .build())
            .setDesc(false) // *false表示升序（ASC），true表示降序（DESC）*
            .build());
}};

完整修正后的代码片段 #

String VIEW_ID = "0000000000";
String[] GA_METRICS = {"newUsers","activeUsers","totalUsers","addToCarts","cartToViewRate","checkouts","screenPageViews","totalPurchasers"};
List<Metric> metrics = new ArrayList<Metric>() {{
    for(String metricName : GA_METRICS) {
        add(Metric.newBuilder().setName(metricName).build());
    }               
}};
                    
List<OrderBy> orderBys = new ArrayList<OrderBy>() {{
    // 按date字段升序排序
    add(OrderBy.newBuilder()
            .setDimension(OrderBy.DimensionOrderBy.newBuilder()
                    .setDimensionName("date")
                    .build())
            .setDesc(false)
            .build());
}};

RunReportRequest request = RunReportRequest.newBuilder().setProperty("properties/" + VIEW_ID)
        .addDimensions(Dimension.newBuilder().setName("date"))
        .addAllMetrics(metrics)
        .addAllOrderBys(orderBys)
        .addDateRanges(DateRange.newBuilder().setStartDate(dateRanges.get("startDate")).setEndDate(dateRanges.get("endDate"))).build();

说明：因为是按维度date排序，所以需要通过OrderBy.DimensionOrderBy指定排序维度名称，再通过setDesc(false)显式设置为升序（若省略该参数，默认排序方向也为升序，但显式设置更易维护）。

内容的提问来源于stack exchange，提问作者kim jason