在一個循環中使用字符串生成器和數組java

Question

我試圖使用字符串生成器追加第一個文件與它的位置，然後新線第二個文件與其位置等。我該怎麼做？什麼是正確的語法？我的下面循環有什麼問題？

@Override 
public List<FileUpload> uploadFile(MultipartFile[] files, String windowsUsername, String number) { 
List<FileUpload> uploadList = new ArrayList<FileUpload>(); 
     for (MultipartFile file : files) { 

       FileUpload result = itsmFileService.uploadAttachment(file, number); 


       uploadList.add(result);  



     } 
     String supportCallID; 
     supportCallID = this.getSupportCallIDForTicketNumber(number); 

int i = 0; 
      for (FileUpload loopLocation : uploadList){ 
       notesSection = uploadList.get(i).getLocation(); 
       StringBuilder sb = new StringBuilder(); 
       sb.append(notesSection); 
       sb.toString(); 
      } 

    } 

}

Answer 1

您正在創建一個新的StringBuilder每次循環運行。請嘗試以下操作：

StringBuilder sb = new StringBuilder(); 

for (FileUpload loopLocation : uploadList){ 
    string notesSection = uploadList.get(i).getLocation(); 

    sb.append(notesSection); 
} 

sb.toString();