JAVA导出Excel通用类

package com.ss.util.excel;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
* Excel实体BEAN的属性注解
* @author
* 2012-10-10
*/
@Documented 
@Retention(RetentionPolicy.RUNTIME) 
@Target(ElementType.FIELD)
public @interface ExcelAnnotation {

String name();//Excel列名
int width();//Excel列宽
int id();//Excel列ID

}

package com.ss.util.excel;

import java.lang.reflect.Field;
import java.util.Comparator;


@SuppressWarnings("unchecked")
public class FieldComparator implements Comparator {

    public int compare(Object arg0, Object arg1) {
        Field fieldOne = (Field)arg0;
        Field fieldTwo = (Field)arg1;
        ExcelAnnotation annoOne = fieldOne.getAnnotation(ExcelAnnotation.class);
        ExcelAnnotation annoTwo = fieldTwo.getAnnotation(ExcelAnnotation.class);
        return annoOne.id()-annoTwo.id();
    }

}

package com.ss.util.excel;

import java.awt.Color;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;


import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.Pattern;
import jxl.format.RGB;
import jxl.format.UnderlineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

/**
* 导出Excel文件
*
* @author 2012-10-10
*/
public class ExcelExport {

    /**
     * 生成Excel
     *
     * @param models
     *            封装需要到处的数据BEAN结合
     * @param className
     *            导成Excel的实体BEAN包名.类名
     * @param tempPath
     *            生成Excel存放的临时路径
     * @param excelName
     *            生成的Excel名
     */
    @SuppressWarnings("unchecked")
    public static void createExcel(List models, String className,
            String tempPath, String excelName) {
        Class clasVo = null;

        try {
            clasVo = Class.forName(className);
            OutputStream os = new FileOutputStream(tempPath + "\\" + excelName
                    + ".xls");
            WritableWorkbook workbook = Workbook.createWorkbook(os);
            WritableSheet sheet = workbook.createSheet(excelName, 0);
            // 用于标题
            WritableFont titleFont = new WritableFont(WritableFont.ARIAL, 17,
                    WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,
                    jxl.format.Colour.WHITE);
            WritableCellFormat wcf_title = new WritableCellFormat(titleFont);
            wcf_title.setBackground(Colour.TEAL,Pattern.SOLID);
            wcf_title.setBorder(Border.ALL, BorderLineStyle.DOUBLE, Colour.OCEAN_BLUE);
            wcf_title.setVerticalAlignment(VerticalAlignment.CENTRE); // 垂直对齐
            wcf_title.setAlignment(Alignment.CENTRE);

            // 用于正文
            WritableFont NormalFont = new WritableFont(WritableFont.TAHOMA, 11);
            WritableCellFormat wcf_center = new WritableCellFormat(NormalFont);
            wcf_center.setBorder(Border.ALL, BorderLineStyle.DOUBLE, Colour.GRAY_25);
            wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 垂直对齐
            wcf_center.setAlignment(Alignment.CENTRE);
            wcf_center.setWrap(true); // 是否换行

            sheet.addCell(new Label(0, 0, excelName, wcf_title));
            sheet.mergeCells(0, 0, clasVo.getDeclaredFields().length - 1, 0);

            // 获取属性
            Field[] fields = clasVo.getDeclaredFields();
            //按照注解id排序Excel列
            Arrays.sort(fields,new FieldComparator());
            for (int i = 0; i < fields.length; i++) {
                Field field = fields[i];
                if (field.isAnnotationPresent(ExcelAnnotation.class)) {
                    //获取该字段的注解对象
                    ExcelAnnotation anno = field
                            .getAnnotation(ExcelAnnotation.class);
                    sheet.setColumnView(i, anno.width());
                    sheet.addCell(new Label(i, 1, anno.name(), wcf_center));
                }
            }

            int rowId = 2;// 写入第几行 第一行为列头 数据从第二行开始写
            for (Object ssTopModel : models) {
                int columnId = 0;// 写入第几列 第一列为自动计算的行号 数据从第二列开始写
                // 获取该类 并获取自身方法
                Class clazz = ssTopModel.getClass();
                for (int i = 0; i < fields.length; i++) {
                    Field field = fields[i];
                    if (field.isAnnotationPresent(ExcelAnnotation.class)) {
                        String methodName = "get"+field.getName().substring(0,1).toUpperCase()+field.getName().substring(1);
                        Method method = clazz.getMethod(methodName);
                        try {
                            sheet.addCell(new Label(columnId, rowId, method
                                    .invoke(ssTopModel) == null ? ""
                                    : method.invoke(ssTopModel)
                                            .toString(), wcf_center));
                        } catch (IllegalArgumentException e) {
                            e.printStackTrace();
                        } catch (IllegalAccessException e) {
                            e.printStackTrace();
                        } catch (InvocationTargetException e) {
                            e.printStackTrace();
                        }
                        columnId++;
                    }
                }
                rowId++;
            }

            workbook.write();
            workbook.close();
            os.flush();
            os.close();
        } catch (WriteException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
    }
}