package com.gomsws.util;


import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.lang.reflect.Field;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * Package：com.gomsws.util
 * Author：tanyong
 * Date： 2016/12/1
 * Desc：檔案工具類
 */
public class FileUtil {
    private static Logger logger = LoggerFactory
            .getLogger(FileUtil.class);

    /**
     * 讀取xml
     * @param classz
     * @param fileSrc
     * @return
     */
    public static List readExcel(Class classz,String fileSrc){
        List list = new ArrayList<>();

        try {
            File file = new File(fileSrc);
            FileInputStream fileInputStream = new FileInputStream(file);
            XSSFWorkbook workbook = new XSSFWorkbook(fileInputStream);
            XSSFSheet sheet = workbook.getSheetAt(0);

            if(sheet.getLastRowNum() < 1){
                return list;
            }

            XSSFRow headRow = sheet.getRow(0);

            for (int i = 1; i < sheet.getLastRowNum() + 1 ; i++){
                XSSFRow row = sheet.getRow(i);
                Object t = classz.newInstance();

                for(int j = 0; j < row.getLastCellNum(); j++){
                    XSSFCell cellHeadFiled = headRow.getCell(j);
                    XSSFCell cellFiled = row.getCell(j);
                    if(cellHeadFiled == null || cellFiled == null){
                        continue;
                    }

                    String cellFiledName = null;
                    if(cellHeadFiled != null){
                        cellFiledName = cellHeadFiled.getRichStringCellValue().getString();
                    }

                    cellFiled.setCellType(Cell.CELL_TYPE_STRING);
                    String cellFiledValue = String.valueOf(cellFiled.getRichStringCellValue());

                    setFiledValue(t, cellFiledName, cellFiledValue);
                }

                list.add(t);
            }
        } catch (Exception e) {
            e.printStackTrace();
            logger.error("解析excel異常");
        }

        return list;
    }

    /**
     * 設定欄位值
     * @param object
     * @param excelFiledName
     * @param value
     */
    private static void setFiledValue(Object object,String excelFiledName,String value){
        Class classz = object.getClass();
        Field[] fields = classz.getDeclaredFields();

        for(Field field : fields){
            String filedName = field.getName();
            ExcelField excelField = field.getAnnotation(ExcelField.class);
            if(excelField != null){
                filedName = excelField.fieldName();
            }

            String orgFiledName = field.getType().getName();
            String filedTypeName = orgFiledName.toUpperCase();

            if(excelFiledName.equalsIgnoreCase(filedName)){
                field.setAccessible(true);
                try {
                    if(isNumeric(value)){
                        NumberFormat numberFormat = NumberFormat.getNumberInstance();
                        Number number = numberFormat.parse(value);

                        if(filedTypeName.contains("INT")){
                            field.set(object, number.intValue());
                        }else if(filedTypeName.contains("DOUBLE")){
                            field.set(object, number.doubleValue());
                        }else if(filedTypeName.contains("FLOAT")){
                            field.set(object, number.floatValue());
                        }else if(filedTypeName.contains("LONG")){
                            field.set(object, number.longValue());
                        }else if(filedTypeName.contains("SHORT")){
                            field.set(object, number.shortValue());
                        }
                    }else {
                        if(filedTypeName.contains("BOOLEAN")){
                            field.set(object,Boolean.valueOf(value));
                        }else{
                            field.set(object,value);
                        }
                    }

                }  catch (Exception e) {
                    e.printStackTrace();
                    logger.error("暫不支援的資料型別["+orgFiledName+"]");

                }
                break;
            }
        }
    }

    /**
     * 判斷字串是否為數字
     * @param str
     * @return
     */
    public static boolean isNumeric(String str){
        if(StringUtils.isEmpty(str)){
            return false;
        }

        for (int i = str.length();--i>=0;){
            if (!Character.isDigit(str.charAt(i))){
                return false;
            }
        }
        return true;
    }

    public static void main(String[] args) {
        String sre = "D://b.csv";
        List<Person> persons = readExcel(Person.class, sre);
        for(Person person : persons){
            System.out.println("姓名:"+person.getName()+"---年齡:"+person.getAge()+"---性別:"+person.getSex());
        }

    }

}
 

package com.gomsws.util;

import java.lang.annotation.*;

/**
 * Package：com.gomsws.util
 * Author：tanyong
 * Date： 2016/12/2
 * Desc：Excel欄位名
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ExcelField {

    public String fieldName();
}

package com.gomsws.util;

/**
 * Package：com.gomsws.util
 * Author：tanyong
 * Date： 2016/12/2
 * Desc：
 */
public class Person {
    @ExcelField(fieldName="名字")
    private String name;
    private double age;
    private String sex;

    public Person(){

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getAge() {
        return age;
    }

    public void setAge(double age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}