【问题】

        I have an excel file with following data (dummy)

  I am reading this file and storing the result in a Set so that duplicates can be removed and I only get unique list. Below is the what I tried：

FileInputStream file = new FileInputStream(new File(“C:\\Users\\harshita.sethi\\Desktop\\ALLOT010T_Input_Keywords.xls”));

HSSFWorkbook w = new HSSFWorkbook(file);

HSSFSheet sheet = w.getSheetAt(0);

int totalrows = sheet.getLastRowNum();

System.out.println(sheet.getRow(0).getPhysicalNumberOfCells());

String[][] data = new String[totalrows+1][sheet.getRow(0).getPhysicalNumberOfCells()];

Set<String[]> keySet = new HashSet<>();

for (int i = 0; i <= totalrows; i++) {

    for (int j = 0; j < sheet.getRow(0).getPhysicalNumberOfCells(); j++) {

        HSSFCell cell = sheet.getRow(i).getCell(j);

        // writing keywords from excel into a hashmap

        data[i][j]=cell.getRichStringCellValue().getString();

    }

    keySet.add(data[i]);

}

Iterator<String[]> iterator = keySet.iterator();

System.out.println(“Output Set is as below”);

while(iterator.hasNext()){

    String[] next = iterator.next();

    System.out.println(next[0] + “\t”+ next[1] +"\t"+next[2]);

}

The output of this code is as shown below

Output Set is as below

d   b    c

e   b    c

a   b    c

d   b    c

d   b    c

g   b    c

e   b    c

f   b    c

d   b    c

The set didn’t remove the duplicate. What other approach can I used to eliminate these duplicates. Any column can have different or same value. So I cannot remove duplicates based on a particular column

I want the entire row to be unique.

PS: This data is just dummmy. In real scenario I have more columns and any column value can be different which will make the row unique.

【回答】

这是个典型的去重动作，用 SPL 比 Java 要简单得多。

这段代码可以方便地集成进 Java，参考【Java 如何调用 SPL 脚本​】

执行上述脚本语句即获取结果：

A1：读取 Excel 文件；

A2：获取数据集合并去掉重复数据；