poi 导出excle加固定下拉框，求代码，给全分

[所爱随风起]

在以下代码的基础上改
public class ExportExcel {
private static Logger log = LoggerFactory.getLogger(ExportExcel.class);
private SXSSFWorkbook wb;
private Sheet sheet;
private Map<String, CellStyle> styles;
private int rownum;
List<Object[]> annotationList = Lists.newArrayList();
public ExportExcel(String title, Class<?> cls){
this(title, cls, 1);
}
public ExportExcel(String title, Class<?> cls, int type, int... groups){
// Get annotation field
Field[] fs = cls.getDeclaredFields();
for (Field f : fs){
ExcelField ef = f.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==type)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, f});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, f});
}
}
}
// Get annotation method
Method[] ms = cls.getDeclaredMethods();
for (Method m : ms){
ExcelField ef = m.getAnnotation(ExcelField.class);
if (ef != null && (ef.type()==0 || ef.type()==type)){
if (groups!=null && groups.length>0){
boolean inGroup = false;
for (int g : groups){
if (inGroup){
break;
}
for (int efg : ef.groups()){
if (g == efg){
inGroup = true;
annotationList.add(new Object[]{ef, m});
break;
}
}
}
}else{
annotationList.add(new Object[]{ef, m});
}
}
}
// Field sorting
Collections.sort(annotationList, new Comparator<Object[]>() {
public int compare(Object[] o1, Object[] o2) {
return new Integer(((ExcelField)o1[0]).sort()).compareTo(
new Integer(((ExcelField)o2[0]).sort()));
};
});
// Initialize
List<String> headerList = Lists.newArrayList();
for (Object[] os : annotationList){
String t = ((ExcelField)os[0]).title();
// 如果是导出，则去掉注释
if (type==1){
String[] ss = StringUtils.split(t, "**", 2);
if (ss.length==2){
t = ss[0];
}
}
headerList.add(t);
}
initialize(title, headerList);
}
public ExportExcel(String title, String[] headers) {
initialize(title, Lists.newArrayList(headers));
}

public ExportExcel(String title, List<String> headerList) {
initialize(title, headerList);
}
private void initialize(String title, List<String> headerList) {
this.wb = new SXSSFWorkbook(500);
this.sheet = wb.createSheet("Export");
this.styles = createStyles(wb);
// Create title
if (StringUtils.isNotBlank(title)){
Row titleRow = sheet.createRow(rownum++);
titleRow.setHeightInPoints(30);
Cell titleCell = titleRow.createCell(0);
titleCell.setCellStyle(styles.get("title"));
titleCell.setCellValue(title);
sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(),
titleRow.getRowNum(), titleRow.getRowNum(), headerList.size()-1));
}
// Create header
if (headerList == null){
throw new RuntimeException("headerList not null!");
}
Row headerRow = sheet.createRow(rownum++);
headerRow.setHeightInPoints(16);
for (int i = 0; i < headerList.size(); i++) {
Cell cell = headerRow.createCell(i);
cell.setCellStyle(styles.get("header"));
String[] ss = StringUtils.split(headerList.get(i), "**", 2);
if (ss.length==2){
cell.setCellValue(ss[0]);
Comment comment = this.sheet.createDrawingPatriarch().createCellComment(
new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6));
comment.setString(new XSSFRichTextString(ss[1]));
cell.setCellComment(comment);
}else{
cell.setCellValue(headerList.get(i));
}
sheet.autoSizeColumn(i);
}
for (int i = 0; i < headerList.size(); i++) {
int colWidth = sheet.getColumnWidth(i)*2;
sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth);
}
log.debug("Initialize success.");
}
private Map<String, CellStyle> createStyles(Workbook wb) {
Map<String, CellStyle> styles = new HashMap<String, CellStyle>();
CellStyle style = wb.createCellStyle();
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
Font titleFont = wb.createFont();
titleFont.setFontName("Arial");
titleFont.setFontHeightInPoints((short) 16);
titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
style.setFont(titleFont);
styles.put("title", style);
style = wb.createCellStyle();
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
style.setBorderRight(CellStyle.BORDER_THIN);
style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderTop(CellStyle.BORDER_THIN);
style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
Font dataFont = wb.createFont();
dataFont.setFontName("Arial");
dataFont.setFontHeightInPoints((short) 10);
style.setFont(dataFont);
styles.put("data", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_LEFT);
styles.put("data1", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_CENTER);
styles.put("data2", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_RIGHT);
styles.put("data3", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
Font headerFont = wb.createFont();
headerFont.setFontName("Arial");
headerFont.setFontHeightInPoints((short) 10);
headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
headerFont.setColor(IndexedColors.WHITE.getIndex());
style.setFont(headerFont);
styles.put("header", style);
return styles;
}
public Row addRow(){
return sheet.createRow(rownum++);
}
public Cell addCell(Row row, int column, Object val){
return this.addCell(row, column, val, 0, Class.class);
}
public Cell addCell(Row row, int column, Object val, int align, Class<?> fieldType){
Cell cell = row.createCell(column);
String cellFormatString = "@";
try {
if(val == null){
cell.setCellValue("");
}else if(fieldType != Class.class){
cell.setCellValue((String)fieldType.getMethod("setValue", Object.class).invoke(null, val));
}else{
if(val instanceof String) {
cell.setCellValue((String) val);
}else if(val instanceof Integer) {
cell.setCellValue((Integer) val);
cellFormatString = "0";
}else if(val instanceof Long) {
cell.setCellValue((Long) val);
cellFormatString = "0";
}else if(val instanceof Double) {
cell.setCellValue((Double) val);
cellFormatString = "0.00";
}else if(val instanceof Float) {
cell.setCellValue((Float) val);
cellFormatString = "0.00";
}else if(val instanceof Date) {
cell.setCellValue((Date) val);
cellFormatString = "yyyy-MM-dd HH:mm";
}else {
cell.setCellValue((String)Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(),
"fieldtype."+val.getClass().getSimpleName()+"Type")).getMethod("setValue", Object.class).invoke(null, val));
}
}
if (val != null){
CellStyle style = styles.get("data_column_"+column);
if (style == null){
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"+(align>=1&&align<=3?align:"")));
style.setDataFormat(wb.createDataFormat().getFormat(cellFormatString));
styles.put("data_column_" + column, style);
}
cell.setCellStyle(style);
}
} catch (Exception ex) {
log.info("Set cell value ["+row.getRowNum()+","+column+"] error: " + ex.toString());
cell.setCellValue(val.toString());
}
return cell;
}
public <E> ExportExcel setDataList(List<E> list){
for (E e : list){
int colunm = 0;
Row row = this.addRow();
StringBuilder sb = new StringBuilder();
for (Object[] os : annotationList){
ExcelField ef = (ExcelField)os[0];
Object val = null;
// Get entity value
try{
if (StringUtils.isNotBlank(ef.value())){
val = Reflections.invokeGetter(e, ef.value());
}else{
if (os[1] instanceof Field){
val = Reflections.invokeGetter(e, ((Field)os[1]).getName());
}else if (os[1] instanceof Method){
val = Reflections.invokeMethod(e, ((Method)os[1]).getName(), new Class[] {}, new Object[] {});
}
}
// If is dict, get dict label
if (StringUtils.isNotBlank(ef.dictType())){
val = DictUtils.getDictLabel(val==null?"":val.toString(), ef.dictType(), "");
}
}catch(Exception ex) {
// Failure to ignore
log.info(ex.toString());
val = "";
}
this.addCell(row, colunm++, val, ef.align(), ef.fieldType());
sb.append(val + ", ");
}
log.debug("Write success: ["+row.getRowNum()+"] "+sb.toString());
}
return this;
}

public ExportExcel write(OutputStream os) throws IOException{
wb.write(os);
return this;
}
public ExportExcel write(HttpServletResponse response, String fileName) throws IOException{
response.reset();
response.setContentType("application/octet-stream; charset=utf-8");
response.setHeader("Content-Disposition", "attachment; filename="+Encodes.urlEncode(fileName));
write(response.getOutputStream());
return this;
}
public ExportExcel writeFile(String name) throws FileNotFoundException, IOException{
FileOutputStream os = new FileOutputStream(name);
this.write(os);
return this;
}
public ExportExcel dispose(){
wb.dispose();
return this;
}
}

[尼古拉斯-全蛋]

固定下拉框是什么鬼

[所爱随风起]

就是导出excle，有下拉框选项