解析xml模板导出Excel

1.pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.tiglle</groupId>
  <artifactId>excel</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <dependencies>
    <!-- https://mvnrepository.com/artifact/net.sourceforge.jexcelapi/jxl -->
    <dependency>
        <groupId>net.sourceforge.jexcelapi</groupId>
        <artifactId>jxl</artifactId>
        <version>2.6.12</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>3.16</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>3.16</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/jdom/jdom -->
    <dependency>
        <groupId>jdom</groupId>
        <artifactId>jdom</artifactId>
        <version>1.1</version>
    </dependency>

  </dependencies>

</project>

2.excelConf.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- 利用xml解析技术,定义导出Excel的模板:包含各种样式 -->
<excel id="student" name="student" excelName="学生信息导入">
    <columns>
        <column index="A" width="17em"></column>
        <column index="B" width="17em"></column>
        <column index="C" width="17em"></column>
        <column index="D" width="17em"></column>
        <column index="E" width="17em"></column>
        <column index="F" width="17em"></column>
    </columns>

    <title rowspan="1" colspan="6">学生信息</title>

    <table>
        <tr height="16px">
            <td>编号</td>
            <td>姓名</td>
            <td>年龄</td>
            <td>生日</td>
            <td>爱好</td>
            <td>性别</td>
        </tr>
    </table>
    <format height="16px" firstRow="2" finstCol="0" repeat="5">
        <td type="String" allowNull="false" maxLength="30"></td>
        <td type="String" allowNull="false" maxLength="40"></td>
        <td type="number" allowNull="false" format="##0"></td>
        <td type="date" allowNull="true" maxLength="30"></td>
        <td type="String" allowNull="true" maxLength="30"></td>
        <td type="enum" allowNull="false" format="男,女"></td>
    </format>
</excel>

3.GenerateExcelByTemplate.java

package com.tiglle.readXml;

import java.awt.Color;
import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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.HorizontalAlignment;
import org.apache.poi.ss.util.CellRangeAddress;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;

/** * 根据xml配置(格式，样式，标题等) * 使用jdom读取xml并生成Excle * @author Administrator * */
public class GenerateExcelByTemplate {

    public static void main(String[] args){
        /****读取classpath下的文件*****/
        //根据本类对象获取类加载器
        ClassLoader classLoader = new GenerateExcelByTemplate().getClass().getClassLoader();
        //根据文件名从classpath下获取文件路径
        URL pathUrl = classLoader.getResource("excelModel.xml");
        //根据URL路径获取文件对象
        File xmlFile = new File(pathUrl.getFile());
        try {
            //创建Excel
            HSSFWorkbook workbook = new HSSFWorkbook();
            //创建一个sheet页
            HSSFSheet sheet1 = workbook.createSheet("sheet第一页");
            /*****通过jdom解析xml文件,并更具读取配置生成Excle***/
            //获取解析器
            SAXBuilder build = new SAXBuilder();
            //将文件内容读进解析器,生成document对象
            Document document = build.build(xmlFile);
            //获取xml跟节点
            Element root = document.getRootElement();
            //获取excel名称(跟节点的excelName属性)
            String excelName = root.getAttribute("excelName").getValue();
            //设置列的属性和宽度
            Element cloumns = root.getChild("columns");
            //获取子元素
            List<Element> childCloumns = cloumns.getChildren("cloumn");
            //循环设置每个列
            for(int i=0;i<childCloumns.size();i++){
                Element cloumn = childCloumns.get(i);
                //获取每个列的宽度属性(width)
                String width = cloumn.getAttribute("width").getValue();
                //截取，得到单位
                String unit = width.substring(width.length()-2,width.length());
                //将单位清空,得到值
                String num = width.replace(unit,"");
                //根据不同的单位转换成Excel的宽度
                int excelWitdh = 0;
                switch(unit){
                case "px":
                    excelWitdh = Math.round(Float.parseFloat(num)*37F);
                    break;
                case "em":
                    excelWitdh = Math.round(Float.parseFloat(num)*267.5F);
                    break;
                }
                //设置列宽
                sheet1.setColumnWidth(i,excelWitdh);
            }

            //设置第一行的标题
            Element title = root.getChild("title");
            //标题内容
            String titleStr = title.getText();
            //合并的行数
            int rowspan = title.getAttribute("rowspan").getIntValue()-1;
            //合并的列数
            int colspan = title.getAttribute("colspan").getIntValue()-1;
            //创建0行
            HSSFRow row0 = sheet1.createRow(0);
            //创建一个cell(单元格)
            HSSFCell titleCell = row0.createCell(0);
            //设置内容
            titleCell.setCellValue(titleStr);
            //设置格式
            HSSFCellStyle cellStyle = workbook.createCellStyle();
            //文字居中
            cellStyle.setAlignment(HorizontalAlignment.CENTER);
            //设置字体
            HSSFFont cellFont = workbook.createFont();
            //文字颜色
            cellFont.setColor((short) 20);
            //字体加入到样式中
            cellStyle.setFont(cellFont);
            titleCell.setCellStyle(cellStyle);
            //合并单元格(startY,endY,startX,endX)
            sheet1.addMergedRegion(new CellRangeAddress(0,rowspan,0,colspan));

            //设置第二行的数据标题
            Element tr = root.getChild("table").getChild("tr");
            List<Element> tds = tr.getChildren("td");
            //创建1行
            HSSFRow row1 = sheet1.createRow(1);
            //设置高度(截取单位并且转换长度)
//          row1.setHeight((short) tr.getAttribute("height").getIntValue());
            for(int i=0;i<tds.size();i++){
                Element td = tds.get(i);
                //创建列
                HSSFCell cell1 = row1.createCell(i);
                //设置内容
                cell1.setCellValue(td.getText());
            }
            //设置样式:循环读取xml配置，就不写了 TODO

            //生成Excel文件
            File excelFile = new File("e:/"+excelName+".xls");
            //创建
            excelFile.createNewFile();
            //将Excel内容写入文件
            FileOutputStream fos = new FileOutputStream(excelFile);
            //开始写
            workbook.write(fos);
            //关闭流
            fos.close();
            workbook.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}