java exl导出通用版
/**
* Excel实体BEAN的属性注解
* @author Y.j
* 2013-9-2下午02:50:37
* 此类为注解类，在所建立的实体BEAN中，对应的属性进行注解
*/
@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
}
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(); }
}
import java.io.FileOutputStream; 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.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;
/** * 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 */ public class PrintExlUtil {
@SuppressWarnings("unchecked") public static void createExcel(List models, String className,String tempPath, String excelName) throws Exception { Class clasVo = null;
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(); } }
/***
最后建立实体BEAN
对对应的属性进行相应的标注
**/
如：
@ExcelAnnotation(name="卷烟代码",width=20,id=1) private String cigCode;//卷烟代码
并需要对应的jxl.jar 包
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