apache的poi提供了支持MS Office文档操作的java API。jXLS则是基于poi提供了支持Excel模版操作的API。
jXLS的主页是:http://jxls.sourceforge.net,似乎国内不能访问,需要代理。
下面是一些例子,以及我对导出到多个sheet的一个封装。
先定义一个模版:
这里的jxls tag和JSP的tag很像,varStatus是本次循环变量。
jxls提供了一个最简单的接口:
void net.sf.jxls.transformer.XLSTransformer.transformXLS(String srcFilePath,Map
beanParams, String destFilePath) throwsParsePropertyException,IOException,InvalidFormatException
public class VM { private String id; private String name; private String scale; private Date created; private Double price; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getScale() { return scale; } public void setScale(String scale) { this.scale = scale; } public Date getCreated() { return created; } public void setCreated(Date created) { this.created = created; } public Double getPrice() { return price; } public void setPrice(Double price) { this.price = price; } }
Java代码
- String srcFilePath = "E:\\tmp\\template-simple.xlsx";
- Map<String, Object> beanParams = new HashMap<String, Object>();
- List<VM> vms = new ArrayList<VM>();
- VM vm = new VM();
- vm.setName("我的CENTOS");
- vm.setPrice(103);
- vm.setScale("2CPU, 2G MEM, 2T DISK");
- vm.setCreated(new Date());
- vms.add(vm);
- VM vm2 = new VM();
- vm2.setName("my-ubuntu");
- vm2.setPrice(200);
- vm2.setScale("1CPU, 3G MEM, 1T DISK");
- vm2.setCreated(new Date());
- vms.add(vm2);
- beanParams.put("vms", vms);
- String destFilePath = "E:\\tmp\\simple.xlsx";
- XLSTransformer transformer = new XLSTransformer();
- transformer.transformXLS(srcFilePath, beanParams, destFilePath);
String srcFilePath = "E:\\tmp\\template-simple.xlsx"; Map<String, Object> beanParams = new HashMap<String, Object>(); List<VM> vms = new ArrayList<VM>(); VM vm = new VM(); vm.setName("我的CENTOS"); vm.setPrice(103); vm.setScale("2CPU, 2G MEM, 2T DISK"); vm.setCreated(new Date()); vms.add(vm); VM vm2 = new VM(); vm2.setName("my-ubuntu"); vm2.setPrice(200); vm2.setScale("1CPU, 3G MEM, 1T DISK"); vm2.setCreated(new Date()); vms.add(vm2); beanParams.put("vms", vms); String destFilePath = "E:\\tmp\\simple.xlsx"; XLSTransformer transformer = new XLSTransformer(); transformer.transformXLS(srcFilePath, beanParams, destFilePath);
执行结果:
jXLS提供了很多方法,支持很复杂的表格生成。
但如果要指定在一个sheet最大行数,不是很方便,我包装了一个util方法:
Java代码
- package org.jamee.demo.poiexcel;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
- import net.sf.jxls.transformer.XLSTransformer;
- import org.apache.poi.ss.usermodel.Workbook;
- public class ExcelUtil {
- private static final String DEFAULT_SHEET_NAME = "sheet";
- /**
- * 导出无动态表头的Excel文件
- * <p>
- * 参考重载的有动态表头注释
- * </p>
- * @param destOutputStream
- * @param templateInputStream
- * @param data
- * @param dataKey
- * @param maxRowPerSheet
- * @throws Exception
- */
- @SuppressWarnings("rawtypes")
- public static void generateExcelByTemplate(OutputStream destOutputStream,
- InputStream templateInputStream,
- List data, String dataKey,
- int maxRowPerSheet) throws Exception {
- generateExcelByTemplate(destOutputStream,
- templateInputStream,
- null, null,
- data, dataKey,
- maxRowPerSheet);
- }
- /**
- * 通过Excel模版生成Excel文件
- * <p>
- * 创建Excel模版,变量类似JSP tag风格。
- * 例如:
- * <ul>
- * <li>无动态表头
- * <pre>
- * 序号 名称 规格 创建时间 价格
- * <jx:forEach items="${vms}" var="vm">
- * ${vm.id} ${vm.name} ${vm.scale} ${vm.created} ${vm.price}
- * </jx:forEach>
- * </pre>
- * </li>
- * <li>有动态表头
- * <pre>
- * 项目/数量/时间 <jx:forEach items="${dates}" var="date"> ${date} </jx:forEach>
- * <jx:forEach items="${itemsx}" var="item">
- * ${item.name} <jx:forEach items="${item.counts}" var="count"> ${count} </jx:forEach>
- * </jx:forEach>
- * </pre>
- * </li>
- * </ul>
- * 调用该方法则生成对应的Excel文件。
- * </p>
- * <p>
- * 注意:dataKey不能是items, items是保留字,如果用items则会提示:Collection is null并抛出NullPointerException
- * </p>
- * @param destOutputStream Excel输出流
- * @param templateInputStream Excel模版输入流
- * @param header 动态表头
- * @param headerKey 表头的变量
- * @param data 数据项
- * @param dataKey 数据项变量
- * @param maxRowPerSheet 每个sheet最多行数
- * @throws Exception
- */
- @SuppressWarnings("rawtypes")
- public static void generateExcelByTemplate(OutputStream destOutputStream,
- InputStream templateInputStream,
- List header, String headerKey,
- List data, String dataKey,
- int maxRowPerSheet) throws Exception {
- List<List> splitData = null;
- @SuppressWarnings("unchecked")
- Map<String, List> beanMap = new HashMap();
- List<String> sheetNames = new ArrayList<String>();
- if (data.size() > maxRowPerSheet) {
- splitData = splitList(data, maxRowPerSheet);
- sheetNames = new ArrayList<String>(splitData.size());
- for (int i = 0; i < splitData.size(); ++i) {
- sheetNames.add(DEFAULT_SHEET_NAME + i);
- }
- } else {
- splitData = new ArrayList<List>();
- sheetNames.add(DEFAULT_SHEET_NAME + 0);
- splitData.add(data);
- }
- if (null != header) {
- beanMap.put(headerKey, header);
- }
- XLSTransformer transformer = new XLSTransformer();
- Workbook workbook = transformer.transformMultipleSheetsList(
- templateInputStream, splitData, sheetNames, dataKey, beanMap, 0);
- workbook.write(destOutputStream);
- }
- /**
- * 导出无动态表头的Excel文件,目标文件和模版文件均为文件路径
- * <p>
- * 参考重载的有动态表头注释
- * </p>
- * @param destFilePath
- * @param templateFilePath
- * @param data
- * @param dataKey
- * @param maxRowPerSheet
- * @throws Exception
- */
- @SuppressWarnings("rawtypes")
- public static void generateExcelByTemplate(String destFilePath,
- String templateFilePath,
- List data, String dataKey, int maxRowPerSheet) throws Exception {
- generateExcelByTemplate(destFilePath, templateFilePath, null, null, data, dataKey, maxRowPerSheet);
- }
- /**
- * 导出有动态表头的Excel文件,目标文件和模版文件均为文件路径
- * <p>
- * 参考重载的有动态表头注释
- * </p>
- * @param destFilePath
- * @param templateFilePath
- * @param header
- * @param headerKey
- * @param data
- * @param dataKey
- * @param maxRowPerSheet
- * @throws Exception
- */
- @SuppressWarnings("rawtypes")
- public static void generateExcelByTemplate(String destFilePath,
- String templateFilePath,
- List header, String headerKey,
- List data, String dataKey, int maxRowPerSheet) throws Exception {
- generateExcelByTemplate(new FileOutputStream(destFilePath),
- new FileInputStream(templateFilePath),
- header, headerKey,
- data, dataKey, maxRowPerSheet);
- }
- @SuppressWarnings({ "rawtypes", "unchecked" })
- private static List<List> splitList(List data, int maxRowPerSheet) {
- List<List> splitData = new ArrayList<List>();
- List sdata = null;
- for (int i = 0; i < data.size(); ++i) {
- if (0 == i % maxRowPerSheet) {
- if (null != sdata) {
- splitData.add(sdata);
- }
- sdata = new ArrayList(maxRowPerSheet);
- }
- sdata.add(data.get(i));
- }
- if (0 != maxRowPerSheet % data.size()) {
- splitData.add(sdata);
- }
- return splitData;
- }
- }
package org.jamee.demo.poiexcel; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import net.sf.jxls.transformer.XLSTransformer; import org.apache.poi.ss.usermodel.Workbook; public class ExcelUtil { private static final String DEFAULT_SHEET_NAME = "sheet"; /** * 导出无动态表头的Excel文件 * <p> * 参考重载的有动态表头注释 * </p> * @param destOutputStream * @param templateInputStream * @param data * @param dataKey * @param maxRowPerSheet * @throws Exception */ @SuppressWarnings("rawtypes") public static void generateExcelByTemplate(OutputStream destOutputStream, InputStream templateInputStream, List data, String dataKey, int maxRowPerSheet) throws Exception { generateExcelByTemplate(destOutputStream, templateInputStream, null, null, data, dataKey, maxRowPerSheet); } /** * 通过Excel模版生成Excel文件 * <p> * 创建Excel模版,变量类似JSP tag风格。 * 例如: * <ul> * <li>无动态表头 * <pre> * 序号 名称 规格 创建时间 价格 * <jx:forEach items="${vms}" var="vm"> * ${vm.id} ${vm.name} ${vm.scale} ${vm.created} ${vm.price} * </jx:forEach> * </pre> * </li> * <li>有动态表头 * <pre> * 项目/数量/时间 <jx:forEach items="${dates}" var="date"> ${date} </jx:forEach> * <jx:forEach items="${itemsx}" var="item"> * ${item.name} <jx:forEach items="${item.counts}" var="count"> ${count} </jx:forEach> * </jx:forEach> * </pre> * </li> * </ul> * 调用该方法则生成对应的Excel文件。 * </p> * <p> * 注意:dataKey不能是items, items是保留字,如果用items则会提示:Collection is null并抛出NullPointerException * </p> * @param destOutputStream Excel输出流 * @param templateInputStream Excel模版输入流 * @param header 动态表头 * @param headerKey 表头的变量 * @param data 数据项 * @param dataKey 数据项变量 * @param maxRowPerSheet 每个sheet最多行数 * @throws Exception */ @SuppressWarnings("rawtypes") public static void generateExcelByTemplate(OutputStream destOutputStream, InputStream templateInputStream, List header, String headerKey, List data, String dataKey, int maxRowPerSheet) throws Exception { List<List> splitData = null; @SuppressWarnings("unchecked") Map<String, List> beanMap = new HashMap(); List<String> sheetNames = new ArrayList<String>(); if (data.size() > maxRowPerSheet) { splitData = splitList(data, maxRowPerSheet); sheetNames = new ArrayList<String>(splitData.size()); for (int i = 0; i < splitData.size(); ++i) { sheetNames.add(DEFAULT_SHEET_NAME + i); } } else { splitData = new ArrayList<List>(); sheetNames.add(DEFAULT_SHEET_NAME + 0); splitData.add(data); } if (null != header) { beanMap.put(headerKey, header); } XLSTransformer transformer = new XLSTransformer(); Workbook workbook = transformer.transformMultipleSheetsList( templateInputStream, splitData, sheetNames, dataKey, beanMap, 0); workbook.write(destOutputStream); } /** * 导出无动态表头的Excel文件,目标文件和模版文件均为文件路径 * <p> * 参考重载的有动态表头注释 * </p> * @param destFilePath * @param templateFilePath * @param data * @param dataKey * @param maxRowPerSheet * @throws Exception */ @SuppressWarnings("rawtypes") public static void generateExcelByTemplate(String destFilePath, String templateFilePath, List data, String dataKey, int maxRowPerSheet) throws Exception { generateExcelByTemplate(destFilePath, templateFilePath, null, null, data, dataKey, maxRowPerSheet); } /** * 导出有动态表头的Excel文件,目标文件和模版文件均为文件路径 * <p> * 参考重载的有动态表头注释 * </p> * @param destFilePath * @param templateFilePath * @param header * @param headerKey * @param data * @param dataKey * @param maxRowPerSheet * @throws Exception */ @SuppressWarnings("rawtypes") public static void generateExcelByTemplate(String destFilePath, String templateFilePath, List header, String headerKey, List data, String dataKey, int maxRowPerSheet) throws Exception { generateExcelByTemplate(new FileOutputStream(destFilePath), new FileInputStream(templateFilePath), header, headerKey, data, dataKey, maxRowPerSheet); } @SuppressWarnings({ "rawtypes", "unchecked" }) private static List<List> splitList(List data, int maxRowPerSheet) { List<List> splitData = new ArrayList<List>(); List sdata = null; for (int i = 0; i < data.size(); ++i) { if (0 == i % maxRowPerSheet) { if (null != sdata) { splitData.add(sdata); } sdata = new ArrayList(maxRowPerSheet); } sdata.add(data.get(i)); } if (0 != maxRowPerSheet % data.size()) { splitData.add(sdata); } return splitData; } }
简单用法:
Java代码
- List<VM> vms = new ArrayList<VM>();
- for (int i = 0; i < 21; ++i) {
- VM vma = new VM();
- vma.setId(i);
- vma.setName("我的CENTOS" + i);
- vma.setPrice(103);
- vma.setScale("2CPU, 2G MEM, 2T DISK");
- vma.setCreated(new Date());
- vms.add(vma);
- }
- ExcelUtil.generateExcelByTemplate("E:\\tmp\\ex-sample.xlsx", "E:\\tmp\\template-simple.xlsx", vms, "vms", 10);
List<VM> vms = new ArrayList<VM>(); for (int i = 0; i < 21; ++i) { VM vma = new VM(); vma.setId(i); vma.setName("我的CENTOS" + i); vma.setPrice(103); vma.setScale("2CPU, 2G MEM, 2T DISK"); vma.setCreated(new Date()); vms.add(vma); } ExcelUtil.generateExcelByTemplate("E:\\tmp\\ex-sample.xlsx", "E:\\tmp\\template-simple.xlsx", vms, "vms", 10);
运行结果:
可见有3个sheet生成。
接口中的动态表头是指表头是数据项中的字段,例如:日期,项目等。
例如下面这个模版:
调用示例:
Java代码
- List<String> dates = new ArrayList<String>();
- int maxDates = 8;
- for (int i = 0; i < maxDates ; ++i) {
- dates.add("2013-08-1" + i);
- }
- List<ItemCount> itemCounts = new ArrayList<ItemCount>();
- for (int i = 0; i < 82; ++i) {
- ItemCount ic = new ItemCount();
- List<Integer> counts = new ArrayList<Integer>();
- for (int j = 0; j < maxDates; ++j) {
- counts.add(j);
- }
- ic.setCounts(counts);
- ic.setName("item" + i);
- itemCounts.add(ic);
- }
- ExcelUtil.generateExcelByTemplate("E:\\tmp\\ex-cpx.xlsx",
- "E:\\tmp\\template-matrix.xlsx", dates, "dates", itemCounts, "itemsx", 12);
List<String> dates = new ArrayList<String>(); int maxDates = 8; for (int i = 0; i < maxDates ; ++i) { dates.add("2013-08-1" + i); } List<ItemCount> itemCounts = new ArrayList<ItemCount>(); for (int i = 0; i < 82; ++i) { ItemCount ic = new ItemCount(); List<Integer> counts = new ArrayList<Integer>(); for (int j = 0; j < maxDates; ++j) { counts.add(j); } ic.setCounts(counts); ic.setName("item" + i); itemCounts.add(ic); } ExcelUtil.generateExcelByTemplate("E:\\tmp\\ex-cpx.xlsx", "E:\\tmp\\template-matrix.xlsx", dates, "dates", itemCounts, "itemsx", 12);
结果:
时间: 2024-08-30 14:17:00