1、引入依赖
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.0.0</version>
</dependency>2、写注解类
@Retention(RetentionPolicy.RUNTIME)
@Target( { java.lang.annotation.ElementType.FIELD })
public @interface ExcelVOAttribute {
/**
* 导出到Excel中的名字.
*/
public abstract String name();
/**
* 配置列的名称,对应A,B,C,D....
*/
public abstract String column();
public abstract String contentType() default "";
/**
* 提示信息
*/
public abstract String prompt() default "";
/**
* 设置只能选择不能输入的列内容.
*/
public abstract String[] combo() default {};
/**
* 是否导出,应对需求:有时我们需要导出一份模板,这是标题需要但内容需要用户手工填写.
*/
public abstract boolean isExport() default true;
/**
* 是否应用到导入模板上
*/
public abstract boolean isUsedInImport() default true;
/**
* 是否应用到导出上
*/
public abstract boolean isUsedInExport() default true;
}
3、实体类字段加注解
...
@TableField(exist = false)
@ApiModelProperty("分享码链接")
@ExcelVOAttribute(name = "二维码",column="F",contentType = "QRCODE")
private String fxmUrl;
...
4、EXCEL工具类（部分代码）
// 写入各条记录,每条记录对应excel表中的一行
for (int i = startNo; i < endNo; i++) {
row = sheet.createRow(i + 3 - startNo);
T vo = (T) list.get(i); // 得到导出对象.
for (int j = 0; j < fields.size(); j++) {
Field field = fields.get(j);// 获得field.
field.setAccessible(true);// 设置实体类私有属性可访问
ExcelVOAttribute attr = field.getAnnotation(ExcelVOAttribute.class);
try {
// 根据ExcelVOAttribute中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
if (attr.isExport()) {
cell = row.createCell(ExcelFragment.getExcelCol(attr.column()));// 创建cell
if("QRCODE".equals(attr.contentType())){
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.MARGIN, 0);
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
MatrixToImageWriter.writeToStream(
new MultiFormatWriter().encode(String.valueOf(field.get(vo)), BarcodeFormat.QR_CODE, 300, 300, hints), "PNG",
outputStream);
row.setHeight((short) 1000);
HSSFClientAnchor anchor = new HSSFClientAnchor(20, 10, 1003, 245, (short) j, i + 3 - startNo, (short) j, i + 3 - startNo);
patriarch.createPicture(anchor,workbook.addPicture(outputStream.toByteArray(), XSSFWorkbook.PICTURE_TYPE_JPEG));
}else{
// 取得类型,并根据对象类型设置值.
Class<?> fieldType = field.getType();
if (String.class == fieldType) {
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(field.get(vo) == null ? "" : String.valueOf(field.get(vo)));// 如果数据存在就填入,不存在填入空格.
} else if ((Integer.TYPE == fieldType) || (Integer.class == fieldType)) {
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(field.get(vo) == null ? 0 : Integer.parseInt(field.get(vo).toString()));
} else if ((Long.TYPE == fieldType) || (Long.class == fieldType)) {
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(field.get(vo) == null ? 0 : Long.parseLong(field.get(vo).toString()));
} else if ((Float.TYPE == fieldType) || (Float.class == fieldType)) {
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(field.get(vo) == null ? 0 : Double.parseDouble(field.get(vo).toString()));
} else if ((Short.TYPE == fieldType) || (Short.class == fieldType)) {
} else if ((Double.TYPE == fieldType) || (Double.class == fieldType)) {
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(field.get(vo) == null ? 0 : Double.parseDouble(field.get(vo).toString()));
} else if (Character.TYPE == fieldType) {
}
}
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}5、调用
MyExcelUtils<CrmWxUserInfo> myExcelUtils=new MyExcelUtils(CrmWxUserInfo.class);
JsonResult jsonResult= myExcelUtils.exportExcel("wxuser-"+term.getType()+"-"+term.getId(), list, typestr+"列表");
最后成果：
