小编jee*_*esh的帖子

我们需要合并两个具有不同列名的数据集,数据集中没有共同的列.

我们尝试了几种方法,这两种方法都没有产生结果.请告诉我们如何使用Apache spark Java组合两个数据集

输入数据集1

"405-048011-62815", "CRC Industries",

"630-0746","Dixon value",

"4444-444","3M INdustries",

"555-55","Dixon coupling valve"

输入数据集2

"222-2222-5555", "Tata",

"7777-88886","WestSide",

"22222-22224","Reliance",

"33333-3333","V industries"

期待的是

    ----------label1----|------sentence1------|------label2---|------sentence2-----------
    | 405-048011-62815  | CRC Industries      | 222-2222-5555 |                      Tata|
    |        630-0746   |   Dixon value       |   7777-88886  |                  WestSide|
    -------------------------------------------------------------------------------------

`

    List<Row> data = Arrays.asList(
                    RowFactory.create("405-048011-62815", "CRC Industries"),
                    RowFactory.create("630-0746","Dixon value"),
                    RowFactory.create("4444-444","3M INdustries"),
                    RowFactory.create("555-55","Dixon coupling valve"));

    StructType schema = new StructType(new StructField[] {new StructField("label1", DataTypes.StringType, false,Metadata.empty()),
            new StructField("sentence1", DataTypes.StringType, false,Metadata.empty()) });

    Dataset<Row> sentenceDataFrame = spark.createDataFrame(data, schema);

    List<String> listStrings …

起初我知道Xpath和CSS选择器表示法都不同. http://ejohn.org/blog/xpath-css-selectors/

基本上我需要在mousover上生成html元素CSS选择器.

(让你明白在鼠标悬停在元素上时生成Xpath或者特别是Html元素的CSS选择器).我试过event.data.selector有没有api或示例代码