这是我的代码:
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Reader {
public static void read_excel() {
File excel = new File ("C:\\Users\\Username\\Desktop\\java-Tools\\data.xlsx");
FileInputStream fis = new FileInputStream(excel);
XSSFWorkbook wb = new XSSFWorkbook(fis);
}
这会导致以下错误消息:
error: cannot find symbol
File excel = new File ("C:\\Users\\Username\\Desktop\\java-Tools\\data.xlsx");
symbol: class File
location: class reader
我为Apache POI库的jar文件设置了CLASSPATH。以下是CLASSPATH varibale的内容:
.;C:\Users\Username\Desktop\Code\Classes;C:\poi-3.12\poi-3.12-20150511.jar;C:\poi-3.12\poi-ooxml-3.12-20150511.jar;C:\poi-3.12\poi-ooxml-schemas-3.12-20150511.jar;C:\poi-3.12\ooxml-lib\xmlbeans-2.6.0.jar;C:\poi-3.12\lib\commons-codec-1.9.jar;C:\poi-3.12\lib\commons-logging-1.1.3.jar;C:\poi-3.12\lib\junit-4.12.jar; C:\poi-3.12\lib\log4j-1.2.17.jar;C:\poi-3.12\poi-examples-3.12-20150511.jar;C:\poi-3.12\poi-excelant-3.12-20150511.jar;C:\poi-3.12\poi-scratchpad-3.12-20150511.jar
我不明白为什么程序不能编译!
答案 0 :(得分:1)
为File
添加import语句import java.io.File;
答案 1 :(得分:1)
尝试使用以下代码
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.io.File;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Reader {
public static void read_excel() throws FileNotFoundException {
File excel = new File ("C:\\Users\\Username\\Desktop\\java-Tools\\data.xlsx");
FileInputStream fis = new FileInputStream(excel);
XSSFWorkbook wb = new XSSFWorkbook(fis);
}
答案 2 :(得分:0)
好的,这里的代码最终没有产生错误信息:
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.File;
import java.util.*;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Reader {
public static void read_excel() throws FileNotFoundException, IOException {
File excel = new File ("C:\\Users\\Username\\Desktop\\java-Tools\\data.xlsx");
FileInputStream fis = new FileInputStream(excel);
XSSFWorkbook wb = new XSSFWorkbook(fis);
}