[英]Null Pointer Exception while reading from excel?
public class ExecuteTest {
@Test
public void testLogin() throws Exception {
// TODO Auto-generated method stub
`WebDriver webdriver = new FirefoxDriver();
ReadExcelFile file = new ReadExcelFile();
ReadObject object = new ReadObject();
Properties allObjects = object.getObjectRepository();
UIOperation operation = new UIOperation(webdriver);
//Read keyword sheet
Sheet RDSheet = file.readExcel(System.getProperty("user.dir")+"\\","TestCase.xlsx" , "KeywordFramework");
//Find number of rows in excel file
int rowCount = //Loop over all the rows RDSheet.getLastRowNum()-RDSheet.getFirstRowNum();
//Create a loop over all the rows of excel file to read it
for (int i = 1; i < rowCount+1; i++) {
Row row = RDSheet.getRow(i);
//Check if the first cell contain a value, if yes, That means it is the new testcase name
if(row.getCell(0).toString().length()==0){
//Print testcase detail on console
System.out.println(row.getCell(1).toString()+"----"+ row.getCell(2).toString()+"----"+
row.getCell(3).toString()+"----"+ row.getCell(4).toString());
//Call perform function to perform operation on UI
operation.perform(allObjects, row.getCell(1).toString(), row.getCell(2).toString(),
row.getCell(3).toString(), row.getCell(4).toString());
}
else{
//Print the new testcase name when it started
System.out.println("New Testcase->"+row.getCell(0).toString() +" Started");
}
}
}
}
当第一个单元格为空时,获取空指针异常。 我搜索了许多博客,但找不到任何解决方案,有人可以帮助我提供代码。
确保在使用toString()
方法之前添加了一个null检查,否则,如果该值为null
则将获得NPE
。
if (row.getCell(0) != null) {
row.getCell(0).toString() //in this case you are trying to call toString on null value.
}
请参阅此SO question
为每个.toString()
添加一个" "+ x.toString()
,以便该值不为null。 `
for (int i = 1; i < rowCount+1; i++) {
Row row = RDSheet.getRow(i);
//Check if the first cell contain a value, if yes, That means it is the new testcase name
if((row.getCell(0)+"").toString().length()==0){
//Print testcase detail on console
System.out.println((row.getCell(1)+"").toString()+"----"+ (row.getCell(2)+"").toString()+"----"+
(row.getCell(3)+"").toString()+"----"+ (row.getCell(4)+"").toString());
//Call perform function to perform operation on UI
//your operations
}
else{
//Print the new testcase name when it started
System.out.println("New Testcase->"+row.getCell(0).toString() +" Started");
}
}
`
尝试下面的代码为我工作正常,我们不能定义一个Null的长度
if(row.getCell(0)==null){
//Print testcase detail on console
//System.out.println("testing");
System.out.println(row.getCell(1)+"----"+ row.getCell(2)+"----"+
row.getCell(3)+"----"+ row.getCell(4));
//Call perform function to perform operation on UI
try{
operation.perform(allObjects, row.getCell(1)==null?"Not a Valid KeyWord":row.getCell(1).toString(),
row.getCell(2)==null?null:row.getCell(2).toString(),
row.getCell(3)==null?null:row.getCell(3).toString(),
row.getCell(4)==null?null:row.getCell(4).toString());
}catch(Exception e)
{
//will print Error Row and break the flow
System.out.println(i);
System.out.println(e);
break;
}
}
else{
//Print the new testcase name when it started
System.out.println("New Testcase->"+row.getCell(0) +" Started");
}
}
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