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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class Test1 {
public static void main(String[] args) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, IOException {
HSSFWorkbook wb = new HSSFWorkbook();//创建文档对象
HSSFSheet sheet = wb.createSheet();//创建表空间
HSSFRow row = sheet.createRow(0);//创建行
String[] title = {"学院编号","姓名","薪资"};//首行
for (int i = 0; i < title.length; i++) {
HSSFCell createCell = row.createCell(i);//第0行的列
createCell.setCellValue(title[i]);//给列赋值
}
ArrayList<Student> arrayList = new ArrayList<Student>();//创建一个集合
for (int i = 0; i < 50; i++) {//创建对象放到集合中
Student student = new Student(i+1,"张三"+i,100+i);
arrayList.add(student);
}
for (int i = 0; i < arrayList.size(); i++) {
HSSFRow createRow = sheet.createRow(i+1);//创建新的一行
Student student = arrayList.get(i);//通过循环取到Student对象
Class<? extends Student> class1 = student.getClass();//反射
Field[] declaredFields = class1.getDeclaredFields();//获取方法数组
for (int j = 0; j < declaredFields.length; j++) {//遍历这个数组
String name = declaredFields[j].getName();//取到成员变量的名称
String methodName = "get"+name.substring(0,1).toUpperCase()+name.substring(1);//修改名称
Method method = class1.getMethod(methodName);//获取方法名
Object invoke = method.invoke(student);//通过对象调用方法
HSSFCell createCell = createRow.createCell(j);
createCell.setCellValue(invoke+"");
}
}
FileOutputStream fos = new FileOutputStream(new File("D:\\b.xls"));
wb.write(fos);
fos.close();
}
}
愿你胸中有丘壑,眼里存山河。
愿你炼出钻石心,依然芙蓉面。
愿你心中有花,手里有剑。
有慈悲心肠,有金刚手段。
《你才是自己的过来人》
——李爱玲