JAVA反射机制示例，读取excel数据映射到JAVA对象中

import java.beans.PropertyDescriptor;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

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;

/**

 * 读取excel数据映射到指定bean中

 * @author

 * May 30, 2016 5:38:33 PM

 */

public class MyExcelReader {

    /**

     *

     * @author

     * May 30, 2016 5:39:01 PM

     * @param beginRow

     * @param beanpros

     * @param classPathName

     * @param results

     * @param sheet

     * @return

     */

    public String getDatasByrc(int beginRow,Map<Integer,String> beanpros,String classPathName,List<Object> results,Sheet sheet){

        try {

            Class clazz = Class.forName(classPathName);

            Set<Integer> set = beanpros.keySet() ;

            Row row = sheet.getRow(beginRow);

            while(row!=null) {

                Object obj = clazz.newInstance() ;

                for(Integer key:set){

                    String value = "" ;

                    if(row!=null){

                        Cell cell = row.getCell(key) ;

                        if(cell!=null){

                            int type = cell.getCellType() ;

                            if(type == Cell.CELL_TYPE_STRING){

                                value = cell.getStringCellValue() ;

                            }else if(type==Cell.CELL_TYPE_NUMERIC||type==Cell.CELL_TYPE_FORMULA){

                                value = String.valueOf(cell.getNumericCellValue());

                            }else if(type==Cell.CELL_TYPE_BOOLEAN){

                                value = String.valueOf(cell.getBooleanCellValue()) ;

                            }

                        }

                    }

                    PropertyDescriptor pd = new PropertyDescriptor(beanpros.get(key),clazz);

                    Method wM = pd.getWriteMethod();

                    wM.invoke(obj, value);

                }

                results.add(obj);

                row = sheet.getRow(++beginRow);

            }

        } catch (Exception e) {

            e.printStackTrace();

            return "用于接受结果的bean不存在";

        }

        return null ;

    }

    public static void main(String[] args) {

        MyExcelReader mer = new MyExcelReader() ;

        try {

            HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(new File("D:/testimport.xls")));

            Sheet sheet = wb.getSheetAt(0);

            List<Object> results = new ArrayList<Object>() ;

            Map<Integer,String> beanpros = new HashMap<Integer, String>() ;

            beanpros.put(0, "username");

            beanpros.put(1, "password");

            String s = mer.getDatasByrc(0, beanpros, "SysUser", results, sheet);

            if(s==null){

                for(Object obj:results){

                    SysUser bean = (SysUser) obj ;

                    System.out.println(bean.getUsername()+"---"+bean.getPassword());

                }

            }

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

public class SysUser {

    private String username;

    private String password;

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

Excel数据

输出结果：