java web中FileInputStream的路劲老是找不到

Question

用POI操作excell，但是文件路劲老找不到 ，应该怎么写啊
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.faces.application.Application;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.jboss.weld.context.ApplicationContext;

public class ExcellInfo {
private Map allSheet=new HashMap();

public Map<String, List> getAllSheet() {
    return allSheet;
}

public void setAllSheet(Map<String, List> allSheet) {
    this.allSheet = allSheet;
}

public String getInfo() throws IOException{

        System.out.println(this.getClass().getClassLoader().getResource("").getPath());
        allSheet = getAllSheet("上海某购物中心");

    return "ok";
}

public Map<String,List> getAllSheet(String excellName) throws IOException{

    Map<String,List> allSheet=new HashMap<String,List>();  
    List<List> list = null;
    List<String> context = null;
    InputStream inp = new FileInputStream("excell/"+excellName+".xlsx");
    XSSFWorkbook wb = new XSSFWorkbook(inp);
    for (int i = 0; i < wb.getNumberOfSheets(); i++) {
        Sheet sheet = wb.getSheetAt(i);
        list = new ArrayList<List>();
        for (Row row : sheet) {
            context = new ArrayList<String>();
            for (Cell cell : row) {
                context.add(cell.toString());
            }
            list.add(context);
        }
        allSheet.put(sheet.getSheetName(), list);
    }
    return allSheet;    
}

}

Answer 1

InputStream inp = new FileInputStream("excell/"+excellName+".xlsx");
这相对路径对吗？打印出来看看。然后看看有没有这个路径，看看System.out.println(new File(".").getAbsolutePath());路径在哪里
最好加上class的路径比较明确