JSP上传excel及excel插入至数据库的方法

JSP上传excel及excel插⼊⾄数据库的⽅法本⽂实例讲述了JSP上传excel及excel插⼊⾄数据库的⽅法。

分享给⼤家供⼤家参考。

具体如下：
此导⼊excel是与pojo绑定的，（缺点）excle表头必须是pojo的字段值
1. html页⾯：
<form id="myform" method="post" enctype="multipart/form-data">
<table>
<tr>
<td></td>
<td>
<input type="file" name="filepath" id="filepath"
class="easyui-validatebox" required=true
validType="equalLength[4]" missingMessage="⽂件!" value="" />
</td>
</tr>
<tr align="center">
<td colspan="2">
<a id="btn1" class="easyui-linkbutton"
data-options="iconCls:'icon-ok'" style="width: 60px"
onclick="subForm();">OK</a>
<a id="btn2" class="easyui-linkbutton"
data-options="iconCls:'icon-cancel'" style="width: 60px"
onclick="closeDig();">Cancel</a>
</td>
</tr>
</table>
</form>
<script type="text/javascript">
function subForm(){
if($('#myform').form('validate')){
/**
var filepath = $("#filepath").val();
alert(filepath);
$.ajax({
url: 'excleImport',
typs: "post",
data: {"filepath":filepath},
async: false,
error: function(request) {
$('#dg').datagrid('reload');
closeDig();
$.messager.alert("操作提⽰", "操作成功！","info");
},
success: function(data) {
alert("success");
}
});
**/
var filepath = $("#filepath").val();
var re = /(\\+)/g;
var filename = filepath.replace(re,"#");
//对路径字符串进⾏剪切截取
var one = filename.split("#");
//获取数组中最后⼀个，即⽂件名
var two = one[one.length-1];
//再对⽂件名进⾏截取，以取得后缀名
var three = two.split(".");
//获取截取的最后⼀个字符串，即为后缀名
var last = three[three.length-1];
//添加需要判断的后缀名类型
var tp = "xls,xlsx";
//返回符合条件的后缀名在字符串中的位置
var rs = tp.indexOf(last);
if(rs != -1){
$("#myform").attr("action","excleImport");
$("#myform").submit();
}else{
$.messager.alert("操作提⽰", "您选择的上传⽂件不是有效xls或者xlsx⽂件！","error");
return false;
}
} else {
$.messager.alert("操作提⽰", "请选择上传⽂件！","error");
}
}
</script>
2. java代码：
@RequestMapping("/excleImport")
public void excleImport(HttpServletRequest request) throws IOException, Exception {
request.setCharacterEncoding("utf-8"); //设置编码
//获得磁盘⽂件条⽬⼯⼚
DiskFileItemFactory factory = new DiskFileItemFactory();
//获取⽂件需要上传到的路径
String path = request.getRealPath("/upload/kaku");
File uploadDir = new File(path);
if (!uploadDir.exists()) {
uploadDir.mkdirs();
}
factory.setRepository(uploadDir);
//设置缓存的⼤⼩，当上传⽂件的容量超过该缓存时，直接放到暂时存储室
factory.setSizeThreshold(1024*1024) ;
//⾼⽔平的API⽂件上传处理
ServletFileUpload upload = new ServletFileUpload(factory);
//可以上传多个⽂件
List<FileItem> list = (List<FileItem>)upload.parseRequest(request);
for(FileItem item : list)
{
//获取表单的属性名字
String name = item.getFieldName();
//如果获取的表单信息是普通的⽂本信息
if(item.isFormField())
{
//获取⽤户具体输⼊的字符串，名字起得挺好，因为表单提交过来的是字符串类型的
String value = item.getString() ;
request.setAttribute(name, value);
}
//对传⼊的⾮简单的字符串进⾏处理，⽐如说⼆进制的图⽚，电影这些
else
{
/**
* 以下三步，主要获取上传⽂件的名字
*/
//获取路径名
String value = item.getName() ;
//索引到最后⼀个反斜杠
int start = stIndexOf("\\");
//截取上传⽂件的字符串名字，加1是去掉反斜杠，
String filename = value.substring(start+1);
//⽂件后缀名
String prefix = filename.substring(stIndexOf(".") + 1);
CardCenter cardCenter = new CardCenter();
request.setAttribute(name, filename);
//真正写到磁盘上
//它抛出的异常⽤exception 捕捉
//item.write( new File(path,filename) );//第三⽅提供的
//⼿动写的
//OutputStream out = new FileOutputStream(new File(path,filename));
InputStream in = item.getInputStream() ;
List<CardCenter> listFromExcel = (List<CardCenter>)ExelUtil.exportListFromExcel(in, prefix, cardCenter); this.cardCenterService.excleImport(listFromExcel);
/*int length = 0 ;
byte [] buf = new byte[1024] ;
System.out.println("获取上传⽂件的总共的容量："+item.getSize());
// in.read(buf) 每次读到的数据存放在 buf 数组中
while( (length = in.read(buf) ) != -1)
{
//在 buf 数组中取出数据写到（输出流）磁盘上
out.write(buf, 0, length);
} */
in.close();
//out.close();
}
}
}
3. java代码：
public class ExelUtil {
//第⼀列开始
private static int start = 0;
//最后⼀列序号
private static int end =0;
public static String getSubString(String str){
return str.substring(0,stIndexOf("."));
}
/**
* ⽅法描述：由Excel⽂件的Sheet导出⾄List
* @param file
* @param sheetNum
* @return
* @throws IOException
* @author
* @date 2013-3-25 下午10:44:26
* @comment
*/
public static List<?> exportListFromExcel(File file, String fileFormat,Object dtoobj)
throws IOException {
return exportListFromExcel(new FileInputStream(file), fileFormat,dtoobj);
}
/**
* ⽅法描述：由Excel流的Sheet导出⾄List
* @param is
* @param extensionName
* @param sheetNum
* @return
* @throws IOException
* @author
* @date 2013-3-25 下午10:44:03
* @comment
*/
public static List<?> exportListFromExcel(InputStream is,String fileFormat,Object dtoobj) throws IOException { Workbook workbook = null;
if (fileFormat.equals(BizConstant.XLS)) {
workbook = new HSSFWorkbook(is);
} else if (fileFormat.equals(BizConstant.XLSX)) {
workbook = new XSSFWorkbook(is);
}
return exportListFromExcel(workbook,dtoobj);
}
/**
* ⽅法描述：由指定的Sheet导出⾄List
* @param workbook
* @param sheetNum
* @return
* @author
* @date 2013-3-25 下午10:43:46
* @comment
*/
private static List<Object> exportListFromExcel(Workbook workbook ,Object dtoobj) {
List<Object> list = new ArrayList<Object>();
String[] model = null;
Sheet sheet = workbook.getSheetAt(0);
// 解析公式结果
FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();
int minRowIx = sheet.getFirstRowNum();
int maxRowIx = sheet.getLastRowNum();
for (int rowIx = minRowIx; rowIx <= maxRowIx; rowIx++) {
Object obj = null;
if(rowIx==minRowIx){
start = sheet.getRow(rowIx).getFirstCellNum();
end = sheet.getRow(rowIx).getLastCellNum();
}
Row row = sheet.getRow(rowIx);
StringBuilder sb = new StringBuilder();
for (int i = start; i < end; i++) {
Cell cell = row.getCell(new Integer(i));
CellValue cellValue = evaluator.evaluate(cell);
if (cellValue == null) {
sb.append(BizConstant.SEPARATOR+null);
continue;
}
// 经过公式解析，最后只存在Boolean、Numeric和String三种数据类型，此外就是Error了 // 其余数据类型，根据官⽅⽂档，完全可以忽略
switch (cellValue.getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
sb.append(BizConstant.SEPARATOR + cellValue.getBooleanValue());
break;
case Cell.CELL_TYPE_NUMERIC:
// 这⾥的⽇期类型会被转换为数字类型，需要判别后区分处理
if (DateUtil.isCellDateFormatted(cell)) {
sb.append(BizConstant.SEPARATOR + cell.getDateCellValue());
} else {
sb.append(BizConstant.SEPARATOR + cellValue.getNumberValue());
}
break;
case Cell.CELL_TYPE_STRING:
sb.append(BizConstant.SEPARATOR + cellValue.getStringValue());
break;
case Cell.CELL_TYPE_FORMULA:
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
break;
default:
break;
}
}
if(rowIx==minRowIx){
String index = String.valueOf(sb);
String realmodel =index.substring(1, index.length());
model =realmodel.split(",");
}else{
String index = String.valueOf(sb);
String realvalue =index.substring(1, index.length());
String[] value =realvalue.split(",");
//字段映射
try {
dtoobj =dtoobj.getClass().newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
obj = reflectUtil(dtoobj,model,value);
list.add(obj);
}
}
return list;
}
/**
* ⽅法描述：字段映射赋值
* @param objOne
* @param listName
* @param listVales
* @return
* @author
* @date 2013-3-25 下午10:53:43
* @comment
*/
@SuppressWarnings("deprecation")
private static Object reflectUtil(Object objOne, String[] listName,
String[] listVales) {
Field[] fields = objOne.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
fields[i].setAccessible(true);
for (int j = 0; j < listName.length; j++) {
if (listName[j].equals(fields[i].getName())) {
try {
if (fields[i].getType().getName().equals(ng.String.class.getName())) {
// String type
if(listVales[j]!=null){
fields[i].set(objOne, listVales[j]);
}else{
fields[i].set(objOne, "");
}
} else if (fields[i].getType().getName().equals(ng.Integer.class.getName())
|| fields[i].getType().getName().equals("int")) {
// Integer type
if(listVales[j]!=null){
fields[i].set(objOne, (int)Double.parseDouble(listVales[j])); }else{
fields[i].set(objOne, -1);
}
}else if(fields[i].getType().getName().equals("Date")){
//date type
if(listVales[j]!=null){
fields[i].set(objOne, Date.parse(listVales[j]));
}
}else if(fields[i].getType().getName().equals("Double")
||fields[i].getType().getName().equals("float")){
//double
if(listVales[j]!=null){
fields[i].set(objOne, Double.parseDouble(listVales[j]));
}else{
fields[i].set(objOne, 0.0);
}
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
break;
}
}
}
return objOne;
}
}
希望本⽂所述对⼤家的JSP程序设计有所帮助。