Excel导入导出（二）导入模版定制

<?xml version="1.0" encoding="UTF-8"?>
<excel id="student" code="student" name="学生信息导入">
<colgroup>
<col index="A" width='17em'></col>
<col index="B" width='17em'></col>
<col index="C" width='17em'></col>
<col index="D" width='17em'></col>
<col index="E" width='17em'></col>
<col index="F" width='17em'></col>
</colgroup>
<title>
<tr height="16px">
<td rowspan="1" colspan="6" value="学生信息导入" />
</tr>
</title>
<thead>
<tr height="16px">
<th value="编号" />
<th value="姓名" />
<th value="年龄" />
<th value="性别" />
<th value="出生日期" />
<th value=" 爱好" />
</tr>
</thead>
<tbody>
<tr height="16px" firstrow="2" firstcol="0" repeat="5">
<td type="string" isnullable="false" maxlength="30" /><!--用户编号 -->
<td type="string" isnullable="false" maxlength="50" /><!--姓名 -->
<td type="numeric" format="##0" isnullable="false" /><!--年龄 -->
<td type="enum" format="男,女" isnullable="true" /><!--性别 -->
<td type="date" isnullable="false" maxlength="30" /><!--出生日期 -->
<td type="enum" format="足球,篮球,乒乓球" isnullable="true" /><!--爱好 -->
</tr>
</tbody>
</excel>

package com.imooc.excel;

import java.io.File;
import java.io.FileOutputStream;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.DVConstraint;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDataValidation;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;

public class CreteTemplate {

/**
* 创建模板文件
* @author David
* @param args
*/
public static void main(String[] args) {
//获取解析xml文件路径
String path = System.getProperty("user.dir") + "/bin/student.xml";
File file = new File(path);
SAXBuilder builder = new SAXBuilder();
try {
//解析xml文件
Document parse = builder.build(file);
//创建Excel
HSSFWorkbook wb = new HSSFWorkbook();
//创建sheet
HSSFSheet sheet = wb.createSheet("Sheet0");

//获取xml文件跟节点
Element root = parse.getRootElement();
//获取模板名称
String templateName = root.getAttribute("name").getValue();

int rownum = 0;
int column = 0;
//设置列宽
Element colgroup = root.getChild("colgroup");
setColumnWidth(sheet,colgroup);

//设置标题
Element title = root.getChild("title");
List<Element> trs = title.getChildren("tr");
for (int i = 0; i < trs.size(); i++) {
Element tr = trs.get(i);
List<Element> tds = tr.getChildren("td");
HSSFRow row = sheet.createRow(rownum);
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
for(column = 0;column <tds.size();column ++){
Element td = tds.get(column);
HSSFCell cell = row.createCell(column);
Attribute rowSpan = td.getAttribute("rowspan");
Attribute colSpan = td.getAttribute("colspan");
Attribute value = td.getAttribute("value");
if(value !=null){
String val = value.getValue();
cell.setCellValue(val);
int rspan = rowSpan.getIntValue() - 1;
int cspan = colSpan.getIntValue() -1;

//设置字体
HSSFFont font = wb.createFont();
font.setFontName("仿宋_GB2312");
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//字体加粗
//                      font.setFontHeight((short)12);
font.setFontHeightInPoints((short)12);
cellStyle.setFont(font);
cell.setCellStyle(cellStyle);
//合并单元格居中
sheet.addMergedRegion(new CellRangeAddress(rspan, rspan, 0, cspan));
}
}
rownum ++;
}
//设置表头
Element thead = root.getChild("thead");
trs = thead.getChildren("tr");
for (int i = 0; i < trs.size(); i++) {
Element tr = trs.get(i);
HSSFRow row = sheet.createRow(rownum);
List<Element> ths = tr.getChildren("th");
for(column = 0;column < ths.size();column++){
Element th = ths.get(column);
Attribute valueAttr = th.getAttribute("value");
HSSFCell cell = row.createCell(column);
if(valueAttr != null){
String value =valueAttr.getValue();
cell.setCellValue(value);
}
}
rownum++;
}

//设置数据区域样式
Element tbody = root.getChild("tbody");
Element tr = tbody.getChild("tr");
int repeat = tr.getAttribute("repeat").getIntValue();

List<Element> tds = tr.getChildren("td");
for (int i = 0; i < repeat; i++) {
HSSFRow row = sheet.createRow(rownum);
for(column =0 ;column < tds.size();column++){
Element td = tds.get(column);
HSSFCell cell = row.createCell(column);
setType(wb,cell,td);
}
rownum++;
}

//生成Excel导入模板
File tempFile = new File("e:/" + templateName + ".xls");
tempFile.delete();
tempFile.createNewFile();
FileOutputStream stream = FileUtils.openOutputStream(tempFile);
wb.write(stream);
stream.close();

} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 测试单元格样式
* @author David
* @param wb
* @param cell
* @param td
*/
private static void setType(HSSFWorkbook wb, HSSFCell cell, Element td) {
Attribute typeAttr = td.getAttribute("type");
String type = typeAttr.getValue();
HSSFDataFormat format = wb.createDataFormat();
HSSFCellStyle cellStyle = wb.createCellStyle();
if("NUMERIC".equalsIgnoreCase(type)){
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
Attribute formatAttr = td.getAttribute("format");
St
cdb9
ring formatValue = formatAttr.getValue();
formatValue = StringUtils.isNotBlank(formatValue)? formatValue : "#,##0.00";
cellStyle.setDataFormat(format.getFormat(formatValue));
}else if("STRING".equalsIgnoreCase(type)){
cell.setCellValue("");
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cellStyle.setDataFormat(format.getFormat("@"));
}else if("DATE".equalsIgnoreCase(type)){
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cellStyle.setDataFormat(format.getFormat("yyyy-m-d"));
}else if("ENUM".equalsIgnoreCase(type)){
CellRangeAddressList regions =
new CellRangeAddressList(cell.getRowIndex(), cell.getRowIndex(),
cell.getColumnIndex(), cell.getColumnIndex());
Attribute enumAttr = td.getAttribute("format");
String enumValue = enumAttr.getValue();
//加载下拉列表内容
DVConstraint constraint =
DVConstraint.createExplicitListConstraint(enumValue.split(","));
//数据有效性对象
HSSFDataValidation dataValidation = new HSSFDataValidation(regions, constraint);
wb.getSheetAt(0).addValidationData(dataValidation);
}
cell.setCellStyle(cellStyle);
}

/**
* 设置列宽
* @author David
* @param sheet
* @param colgroup
*/
private static void setColumnWidth(HSSFSheet sheet, Element colgroup) {
List<Element> cols = colgroup.getChildren("col");
for (int i = 0; i < cols.size(); i++) {
Element col = cols.get(i);
Attribute width = col.getAttribute("width");
String unit = width.getValue().replaceAll("[0-9,\\.]", "");
String value = width.getValue().replaceAll(unit, "");
int v=0;
if(StringUtils.isBlank(unit) || "px".endsWith(unit)){
v = Math.round(Float.parseFloat(value) * 37F);
}else if ("em".endsWith(unit)){
v = Math.round(Float.parseFloat(value) * 267.5F);
}
sheet.setColumnWidth(i, v);
}
}

}