将Excel生成实体类

package com.excel.test;

import java.util.List;

public class createUtil {

	public static String appendPrivate(List<String> types,List<String> attributes,List<String> mark){
		StringBuffer sb = new StringBuffer();
		if(types.size()==attributes.size()&&types.size()==mark.size()){
			for(int i=0;i<types.size();i++){
				sb.append(" 	/**\n");
				sb.append("	*"+mark.get(i)+"\n");
				sb.append("	*/\n");
				sb.append("	private "+types.get(i)+" "+attributes.get(i)+";\n\n");
			}
		}
		return sb.toString();
	}
	public static String getSet(List<String> types,List<String> attributes,List<String> mark){
		StringBuffer sb = new StringBuffer();
		if(types.size()==attributes.size()){
			for(int i=0;i<types.size();i++){
				String attribute = attributes.get(i);
				String c = String.valueOf(attribute.charAt(0));
                c = c.toUpperCase();
                attribute = c + attribute.substring(1);
                sb.append(" 	/**\n");
				sb.append("	* 设置"+mark.get(i)+"\n");
				sb.append("	* @param "+attributes.get(i)+" "+mark.get(i)+"\n");
				sb.append("	*/\n");
				sb.append("	public void set"+attribute+"("+types.get(i)+" "+attributes.get(i)+"){\n");
				sb.append("		this."+attributes.get(i)+" = "+attributes.get(i)+";\n");
				sb.append("	}\n\n");
				sb.append(" 	/**\n");
				sb.append("	*获得"+mark.get(i)+"\n");
				sb.append("	* @return "+attributes.get(i)+" "+mark.get(i)+"\n");
				sb.append("	*/\n");
				sb.append("	public "+types.get(i)+" get"+attribute+"(){\n");
				sb.append("		return "+attributes.get(i)+";\n");
				sb.append("	}\n\n");
			}
		}

		return sb.toString();
	}
}

　　

package com.excel.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ReadExcel3 {

    public static void main(String[] args) throws IOException, InvalidFormatException {
        // TODO Auto-generated method stub

        File file = new File("D:\\user.xlsx");
        String fileName = file.getName();
        String className = "demo";
        File file1 = null;
         FileOutputStream fop = null;
        List<String> types = new ArrayList<String>();
        List<String> attributes = new ArrayList<String>();
        List<String> marks = new ArrayList<String>();
         if (fileName.endsWith("xlsx")){
             XSSFWorkbook workbooks = new XSSFWorkbook(file);
             XSSFSheet xssfSheet = workbooks.getSheetAt(0);
             int totalRows = xssfSheet.getPhysicalNumberOfRows();
             XSSFRow row = xssfSheet.getRow(0);
             className = row.getCell(0).getStringCellValue();
             System.out.println(className+"total:"+totalRows);
             for(int i=2;i<totalRows;i++){
                 XSSFRow row2 = xssfSheet.getRow(i);
                 attributes.add(row2.getCell(0).getStringCellValue());
                 types.add(row2.getCell(1).getStringCellValue());
                 marks.add(row2.getCell(2).getStringCellValue());
             }
         }else {
             HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));
            //读取默认第一个工作表sheet
            HSSFSheet sheet = workbook.getSheetAt(0);
            int firstRowNum = 0;
            //获取sheet中最后一行行号
            int lastRowNum = sheet.getLastRowNum();
            HSSFRow row = sheet.getRow(firstRowNum);
            className = row.getCell(0).getStringCellValue();
            for (int i = 2; i <=lastRowNum; i++){
                HSSFRow row1 = sheet.getRow(i);
                attributes.add(row1.getCell(0).getStringCellValue());
                types.add(row1.getCell(1).getStringCellValue());
                marks.add(row1.getCell(2).getStringCellValue());
            }
        }

        StringBuffer sb = new StringBuffer();

        sb.append("public class "+className+"{\n\n");
        sb.append(createUtil.appendPrivate(types, attributes,marks));
        sb.append(createUtil.getSet(types, attributes,marks));
        sb.append("}");

        file1 = new File("d:/"+className+".java");
        fop = new FileOutputStream(file1);
        if (!file1.exists()) {
            file1.createNewFile();
        }
        byte[] contentInBytes = sb.toString().getBytes();

        fop.write(contentInBytes);
        fop.flush();
        fop.close();

        System.out.println("Done");
    }

}