Java如何读取xls文件呢?

读取excel的实现思路

使用Apache POI的XSSFWorkbook对象
  读取excel中的信息

//定义实体类
//UserRoleBean

package com.java265;  
public class UserRoleBean {
    
    private String userCode ;
    private String roleid;
    private String isflag;
    
    public String getUserCode() {
        return userCode;
    }
    public void setUserCode(String userCode) {
        this.userCode = userCode;
    }
    public String getRoleid() {
        return roleid;
    }
    public void setRoleid(String roleid) {
        this.roleid = roleid;
    }
    public String getIsflag() {
        return isflag;
    }
    public void setIsflag(String isflag) {
        this.isflag = isflag;
    }    
}
 
//读取excel的类

package com.java265;
import java.io.File;
import java.io.FileInputStream;
import java.util.Arraylist;
import java.util.List;
import java.util.logging.Logger;
 
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

 
public class Client {
    
    private static final Logger logger = (Logger) Logger.getLogger(Client.class.getName());
    
    private List<UserRoleBean> getInfoFromExcle(){
        List<UserRoleBean> list = new ArrayList();
        //excel文件路径
        String excelPath = Pub.getPropertiesValue("test", "path");//读取配置文件，例如 D://test/test.xls
        try {
            //String encoding = "GBK";
            File excel = new File(excelPath);
            if (excel.isFile() && excel.exists()) {   //判断文件是否存在
                String[] split = excel.getName().split("\\.");  //.是特殊字符，需要转义！！！！！
                Workbook wb;
                //根据文件后缀（xls/xlsx）进行判断
                if ( "xls".equals(split[1])){
                    FileInputStream fis = new FileInputStream(excel);   //文件流对象
                    wb = new HSSFWorkbook(fis);
                }
                /**
                else if ("xlsx".equals(split[1])){
                    FileInputStream  fis = new FileInputStream(excel);  
                    wb = new XSSFWorkbook(fis);
                }
                */
                else {
                    //System.out.println("文件类型错误!");
                    logger.info("文件类型错误!");
                    return list;
                }

                //开始解析
                Sheet sheet = wb.getSheetAt(0);     //读取sheet 0
                int firstRowIndex = sheet.getFirstRowNum()+1;   //第一行是列名，所以不读
                int lastRowIndex = sheet.getLastRowNum();
                //System.out.println("firstRowIndex: "+firstRowIndex);
                logger.info("firstRowIndex: "+firstRowIndex);
                //System.out.println("lastRowIndex: "+lastRowIndex);
                logger.info("lastRowIndex: "+lastRowIndex);
                //System.out.println("执行进行中......");
                logger.info("执行进行中......");
                
                //遍历行
                for(int rIndex = firstRowIndex; rIndex <= lastRowIndex; rIndex++) {   
                    //System.out.println("rIndex: " + rIndex);
                    Row row = sheet.getRow(rIndex);
                    if (row != null) {
                        //行中第一个值所在的列序号
                        int firstCellIndex = row.getFirstCellNum();
                        //行中最后一个值所在的列序号
                        int lastCellIndex = row.getLastCellNum();
                        UserRoleBean userRoleBean = new UserRoleBean();
                        //遍历列
                        //for (int cIndex = firstCellIndex; cIndex < lastCellIndex; cIndex++) { 
                        for (int cIndex = 0; cIndex < 3; cIndex++) {
                            Cell cell = row.getCell(cIndex);
                            if (cell != null) {
                                //将表格内容强制转换为字符型
                                cell.setCellType(Cell.CELL_TYPE_STRING);
                                //System.out.println(cell.toString());
                                if(cIndex == 0){
                                    userRoleBean.setUserCode(cell.toString());
                                }else if(cIndex == 1){
                                    userRoleBean.setRoleid(cell.toString());
                                }else if(cIndex == 2){
                                    userRoleBean.setIsflag(cell.toString());
                                }
                            }
                        }
                        if(!("".equals(userRoleBean.getUserCode())) && !("".equals(userRoleBean.getRoleid()))){
                            //System.out.println(">>>0000000>>:"+userRoleBean.getRoleid());
                            list.add(userRoleBean);
                        }
                    }
                }
            } else {
                //System.out.println("找不到指定的文件");
                logger.info("找不到指定的文件");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list;
    }
    
    public static void main(String[] args) {
        List<UserRoleBean> list = new ArrayList();
        Client client = new Client();
         //读取excel,并返回list
		list = client.getInfoFromExcle();
    }
}