jxl 导出excel通用工具方法

/**
*
* @param response 响应对象
* @param filename 输出文件名 eg:"expot"
* @param sheetName 输出工作表名 eg:"sheet1"
* @param tableHeadName 工作表中大标题 eg:"this is result sheet!"
* @param titlesList 工作表每一列标题 eg:"列1,列2,列3"
* @param objFieldList 要显示 list 里面所装的对象的字段列表集合 eg:"id,name,sex"
* @param contentList 要写入表格的数据集合
*/
public void exportExcel(HttpServletResponse response, String filename,
String sheetName, String tableHeadName, String[] titlesList,
String[] objFieldList, List<?> contentList) {
ServletOutputStream out = null;
WritableWorkbook book = null;
if (titlesList == null || titlesList.length == 0) {
return;
}
if (objFieldList == null || objFieldList.length == 0) {
return;
}
if (titlesList.length != objFieldList.length) {
return;
}
if (contentList == null || contentList.size() == 0) {
return;
}
try {
response.setContentType("application/ms-excel");
response.reset();
response.setHeader("Content-disposition", "attachment; filename=""
+ new String(filename.getBytes(), "ISO8859-1") + """
+ ".xls");
out = response.getOutputStream();
book = Workbook.createWorkbook(out);
// 计算将会生成几个Sheet表单
int listSize = contentList.size();// 数据总数
int totalCount = 1;// 默认的Sheet的个数表单
int pageSize = 65000;// 设置个sheet表单的条数
if (listSize % pageSize == 0) {
totalCount = listSize / pageSize;
} else {
totalCount = listSize / pageSize + 1;
}
// 反射获取数据集合里面的数据对象
Object obj = contentList.get(0);
Class objClazz = null;
if (obj != null) {
objClazz = obj.getClass();
}
Field[] filds = null;
if (objClazz != null) {
filds = objClazz.getDeclaredFields();// 获取对象的所有字段
}
int totalCol = titlesList.length;
for (int n = 0; n < totalCount; n++) {// 循环执行次数 即需要建立多少个sheet表单
int index = 2;// 行数
int col = 0;// 列数
WritableSheet sheet = null;
if (n != 0) {
sheet = book.createSheet(sheetName + n, n);
} else {
sheet = book.createSheet(sheetName, n);
}
// 表头
Label labelHead = new Label(0, 0, tableHeadName);
sheet.addCell(labelHead);
sheet.mergeCells(0, 0, titlesList.length - 1, 0);// 合并表头信息
WritableCellFormat wc = new WritableCellFormat();
// 设置居中
wc.setAlignment(Alignment.CENTRE);
WritableFont wfont = new WritableFont(
WritableFont.createFont("宋体"), 20);
wc.setFont(wfont);
labelHead.setCellFormat(wc);
// 生成Excel表头数据
for (int i = 0, size = titlesList.length; i < size; i++) {
Label label = new Label(i, 1, titlesList[i]);
sheet.addCell(label);
// 设置每一列的字体样式
WritableFont font3 = new WritableFont(WritableFont.ARIAL, 9);
WritableCellFormat format3 = new WritableCellFormat(font3);
format3.setAlignment(jxl.format.Alignment.CENTRE);
// 将每一列的宽度设置为30
sheet.setColumnView(i, 30, format3);
}
// 生成表格数据
for (int k = n * pageSize; k < n * pageSize + pageSize
&& k < listSize; k++) {
Object objArg = contentList.get(k);// 获取list里面放置的对象
Object content = null;// 值
Object objType = null;// 类型
boolean fg = false;
for (String objAttribute : objFieldList) {// 循环取出每个字段
for (Field fd : filds) {
String fildName = fd.getName();
if (fildName != null && objAttribute != null
&& objAttribute.equals(fildName)) {
boolean flag = fd.isAccessible();
fd.setAccessible(true);
content = fd.get(objArg);// 获取字段的相关属性值
fd.setAccessible(flag);
fg = true;
// 获取当前字段的类型
objType = fd.getType();
break;
}
}
if (fg) {
if (col == totalCol) {
index++;// 行数转为下一行
col = 0;// 列数又从0开始
}
fg = false;
String tempContent = "";

// 特殊数据类型转化
if (objType != null
&& objType.toString().equals(
"class java.util.Date")) {
if (content != null) {
// 时间
String columnName = titlesList[col];
if (columnName != null
&& columnName.indexOf("日期") != -1) {
tempContent = ConstUtil.dateToStr((Date)content, 0);//日期 2012-09-01
} else {
tempContent =ConstUtil.dateToStr((Date)content, 1);//时间 2012-09-01 12:23:55
}
}
} else if (objType != null
&& objType.toString().equals(
"class java.math.BigDecimal")) {
if (content != null) {
// 金额格式 BigDecimal 仅仅用于金额
DecimalFormat df = new DecimalFormat(
"###,##0.00");
tempContent = df.format(content);
}
} else {//其他都用string输出
if (content != null) {
tempContent = content.toString();
}
}
Label label = new Label(col++, index,
tempContent);
sheet.addCell(label);
}
}
}
}
book.write();// 写出Excel表格
response.flushBuffer();
out.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (book != null) {
book.close();
}
if (out != null) {
out.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}