jxls是基于POI API的Excel报表生成工具，可以更简单、灵活的生成我们想要的Excel格式。我们只需要准备写好格式的Excel文件，在文件需要填充内容的位置加上jxls指令，然后就可以导出我们最终想要的Excel。
? 1 2 注意：这里讲的是jxls2，不是jxls1。jxls2不再使用<jx:xx>标签，改为在批注中写指令，这样模版看起来更简洁。 </jx:xx>jxls2 api首页：http://jxls.sourceforge.net/index.html jxls2更多的介绍请看官网和自行搜索，小弟不擅长写这些东东，请多多谅解。
下面看例子： Excel模版文件
所有批注
最终导出Excel文件效果
下面是项目案例 项目结构如下
下面是java代码 Demo.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 public class Demo { static byte [] imgBytes; static { try { InputStream ins = new FileInputStream(Demo. class .getClassLoader().getResource( "img/img.jpg" ).getFile()); imgBytes = IOUtils.toByteArray(ins); ins.close(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) throws FileNotFoundException, IOException { HashMap<string, object= "" > beans = new HashMap<string, object= "" >(); beans.put( "title" , "这是标题" ); beans.put( "list" , getList()); beans.put( "logoImg" , imgBytes); beans.put( "startTime" , new Date()); beans.put( "endTime" , new Date()); beans.put( "exportTime" , new Date()); beans.put( "url" , "http://www.baidu.com" ); beans.put( "company" , "LK_King" ); File template = JxlsUtil.getTemplate( "demo.xlsx" ); File out = new File( "D:/out.xlsx" ); JxlsUtil.exportExcel(template, out, beans); System.out.println( "导出成功" ); } static List<user> getList(){ List<user> list = new ArrayList<user>(); User zs = new User( "张三" ); User ls = new User( "李四" ); User ww = new User( "王五" ); for ( int i = 1 ; i <= 3 ; i++) { zs.getClients().add( new User( "客户" +i, true , imgBytes)); } for ( int i = 1 ; i <= 2 ; i++) { ww.getClients().add( new User( "客户" +i, false , null )); } list.add(zs); list.add(ls); list.add(ww); return list; } }</user></user></user></string,></string,>User.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 public class User { private String name; private boolean sign; private byte [] imgBytes; private List<user> clients = new ArrayList<user>(); public User(String name) { super (); this .name = name; } public User(String name, boolean sign, byte [] imgBytes) { super (); this .name = name; this .sign = sign; this .imgBytes = imgBytes; } public String getName() { return name; } public void setName(String name) { this .name = name; } public boolean getSign() { return sign; } public void setSign( boolean sign) { this .sign = sign; } public byte [] getImgBytes() { return imgBytes; } public void setImgBytes( byte [] imgBytes) { this .imgBytes = imgBytes; } public List<user> getClients() { return clients; } public void setClients(List<user> clients) { this .clients = clients; } }</user></user></user></user>JxlsUtil.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 public class JxlsUtil { static { //添加自定义指令（可覆盖jxls原指令） XlsCommentAreaBuilder.addCommandMapping( "image" , ImageCommand. class ); XlsCommentAreaBuilder.addCommandMapping( "each" , EachCommand. class ); XlsCommentAreaBuilder.addCommandMapping( "merge" , MergeCommand. class ); XlsCommentAreaBuilder.addCommandMapping( "link" , LinkCommand. class ); } /** jxls模版文件目录 */ private final static String TEMPLATE_PATH = "jxlsTemplate" ; /** * 导出excel * @param is - excel文件流 * @param os - 生成模版输出流 * @param beans - 模版中填充的数据 * @throws IOException */ public static void exportExcel(InputStream is, OutputStream os, Map<string, object= "" > beans) throws IOException { Context context = new Context(); if (beans != null ) { for (String key : beans.keySet()) { context.putVar(key, beans.get(key)); } } JxlsHelper jxlsHelper = JxlsHelper.getInstance(); Transformer transformer = jxlsHelper.createTransformer(is, os); JexlExpressionEvaluator evaluator = (JexlExpressionEvaluator)transformer.getTransformationConfig().getExpressionEvaluator(); Map<string, object= "" > funcs = new HashMap<string, object= "" >(); funcs.put( "jx" , new JxlsUtil()); //添加自定义功能 evaluator.getJexlEngine().setFunctions(funcs); jxlsHelper.processTemplate(context, transformer); } /** * 导出excel * @param xlsPath excel文件 * @param outPath 输出文件 * @param beans 模版中填充的数据 * @throws IOException * @throws FileNotFoundException */ public static void exportExcel(String xlsPath, String outPath, Map<string, object= "" > beans) throws FileNotFoundException, IOException { exportExcel( new FileInputStream(xlsPath), new FileOutputStream(outPath), beans); } /** * 导出excel * @param xls excel文件 * @param out 输出文件 * @param beans 模版中填充的数据 * @throws IOException * @throws FileNotFoundException */ public static void exportExcel(File xls, File out, Map<string, object= "" > beans) throws FileNotFoundException, IOException { exportExcel( new FileInputStream(xls), new FileOutputStream(out), beans); } /** * 获取jxls模版文件 */ public static File getTemplate(String name){ String templatePath = JxlsUtil. class .getClassLoader().getResource(TEMPLATE_PATH).getPath(); File template = new File(templatePath, name); if (template.exists()){ return template; } return null ; } // 日期格式化 public String dateFmt(Date date, String fmt) { if (date == null ) { return null ; } try { SimpleDateFormat dateFmt = new SimpleDateFormat(fmt); return dateFmt.format(date); } catch (Exception e) { e.printStackTrace(); } return null ; } // 返回第一个不为空的对象 public Object defaultIfNull(Object... objs) { for (Object o : objs) { if (o != null ) return o; } return null ; } // if判断 public Object ifelse( boolean b, Object o1, Object o2) { return b ? o1 : o2; } }</string,></string,></string,></string,></string,>EachCommand.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 /** * 扩展jxls each命令 * 增加retainEmpty属性，当items为null或size为0时，也保留当前一行数据的格式 * 循环增加下标变量“var_index”。如var="item"，获取下标方法：${item_index} */ public class EachCommand extends AbstractCommand { public enum Direction {RIGHT, DOWN} private String var; private String items; private String select; private Area area; private Direction direction = Direction.DOWN; private CellRefGenerator cellRefGenerator; private String multisheet; private String retainEmpty; //当集合大小为0时，是否最少保留一行空行数据 public EachCommand() { } /** * @param var name of the key in the context to contain each collection items during iteration * @param items name of the collection bean in the context * @param direction defines processing by rows (DOWN - default) or columns (RIGHT) */ public EachCommand(String var, String items, Direction direction) { this .var = var; this .items = items; this .direction = direction == null ? Direction.DOWN : direction; } public EachCommand(String var, String items, Area area) { this (var, items, area, Direction.DOWN); } public EachCommand(String var, String items, Area area, Direction direction) { this (var, items, direction); if (area != null ) { this .area = area; addArea( this .area); } } /** * @param var name of the key in the context to contain each collection items during iteration * @param items name of the collection bean in the context * @param area body area for this command * @param cellRefGenerator generates target cell ref for each collection item during iteration */ public EachCommand(String var, String items, Area area, CellRefGenerator cellRefGenerator) { this (var, items, area, (Direction) null ); this .cellRefGenerator = cellRefGenerator; } /** * Gets iteration directino * * @return current direction for iteration */ public Direction getDirection() { return direction; } /** * Sets iteration direction * * @param direction */ public void setDirection(Direction direction) { this .direction = direction; } public void setDirection(String direction) { this .direction = Direction.valueOf(direction); } /** * Gets defined cell ref generator * * @return current {@link CellRefGenerator} instance or null */ public CellRefGenerator getCellRefGenerator() { return cellRefGenerator; } public void setCellRefGenerator(CellRefGenerator cellRefGenerator) { this .cellRefGenerator = cellRefGenerator; } public String getName() { return "each" ; } /** * Gets current variable name for collection item in the context during iteration * * @return collection item key name in the context */ public String getVar() { return var; } /** * Sets current variable name for collection item in the context during iteration * * @param var */ public void setVar(String var) { this .var = var; } /** * Gets collection bean name * * @return collection bean name in the context */ public String getItems() { return items; } /** * Sets collection bean name * * @param items collection bean name in the context */ public void setItems(String items) { this .items = items; } /** * Gets current 'select' expression for filtering out collection items * * @return current 'select' expression or null if undefined */ public String getSelect() { return select; } /** * Sets current 'select' expression for filtering collection * * @param select filtering expression */ public void setSelect(String select) { this .select = select; } /** * @return Context variable name holding a list of Excel sheet names to output the collection to */ public String getMultisheet() { return multisheet; } /** * Sets name of context variable holding a list of Excel sheet names to output the collection to * @param multisheet */ public void setMultisheet(String multisheet) { this .multisheet = multisheet; } @Override public Command addArea(Area area) { if (area == null ) { return this ; } if ( super .getAreaList().size() >= 1 ) { throw new IllegalArgumentException( "You can add only a single area to 'each' command" ); } this .area = area; return super .addArea(area); } @SuppressWarnings ( "rawtypes" ) public Size applyAt(CellRef cellRef, Context context) { Collection itemsCollection = Util.transformToCollectionObject(getTransformationConfig().getExpressionEvaluator(), items, context); int width = 0 ; int height = 0 ; int index = 0 ; CellRefGenerator cellRefGenerator = this .cellRefGenerator; if (cellRefGenerator == null && multisheet != null ) { List<string> sheetNameList = extractSheetNameList(context); cellRefGenerator = new SheetNameGenerator(sheetNameList, cellRef); } CellRef currentCell = cellRefGenerator != null ? cellRefGenerator.generateCellRef(index, context) : cellRef; JexlExpressionEvaluator selectEvaluator = null ; if (select != null ) { selectEvaluator = new JexlExpressionEvaluator(select); } for (Object obj : itemsCollection) { context.putVar(var, obj); context.putVar(var+ "_index" , index); if (selectEvaluator != null && !Util.isConditionTrue(selectEvaluator, context)) { context.removeVar(var); context.removeVar(var+ "_index" ); continue ; } Size size = area.applyAt(currentCell, context); index++; if (cellRefGenerator != null ) { width = Math.max(width, size.getWidth()); height = Math.max(height, size.getHeight()); if (index < itemsCollection.size()) { currentCell = cellRefGenerator.generateCellRef(index, context); } } else if (direction == Direction.DOWN) { currentCell = new CellRef(currentCell.getSheetName(), currentCell.getRow() + size.getHeight(), currentCell.getCol()); width = Math.max(width, size.getWidth()); height += size.getHeight(); } else { currentCell = new CellRef(currentCell.getSheetName(), currentCell.getRow(), currentCell.getCol() + size.getWidth()); width += size.getWidth(); height = Math.max(height, size.getHeight()); } context.removeVar(var); context.removeVar(var+ "_index" ); } if ( "true" .equalsIgnoreCase(retainEmpty) && width == 0 && height == 0 ){ return area.applyAt(currentCell, context); } return new Size(width, height); } @SuppressWarnings ( "unchecked" ) private List<string> extractSheetNameList(Context context) { try { return (List<string>) context.getVar(multisheet); } catch (Exception e) { throw new JxlsException( "Failed to get sheet names from " + multisheet, e); } } public String getRetainEmpty() { return retainEmpty; } public void setRetainEmpty(String retainEmpty) { this .retainEmpty = retainEmpty; } }</string></string></string>ImageCommand.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 /** * 解决图片最少占4个单元格才显示的问题并保留原来单元格样式 */ public class ImageCommand extends AbstractCommand { private byte [] imageBytes; private ImageType imageType = ImageType.PNG; private Area area; /** * Expression that can be evaluated to image byte array byte[] */ private String src; private String text; //无法读取图片时的提示 public ImageCommand() { } public ImageCommand(String image, ImageType imageType) { this .src = image; this .imageType = imageType; } public ImageCommand( byte [] imageBytes, ImageType imageType) { this .imageBytes = imageBytes; this .imageType = imageType; } /** * @return src expression producing image byte array */ public String getSrc() { return src; } /** * @param src expression resulting in image byte array */ public void setSrc(String src) { this .src = src; } public void setImageType(String strType){ imageType = ImageType.valueOf(strType); } @Override public Command addArea(Area area) { if ( super .getAreaList().size() >= 1 ){ throw new IllegalArgumentException( "You can add only a single area to 'image' command" ); } this .area = area; return super .addArea(area); } public String getName() { return "image" ; } public Size applyAt(CellRef cellRef, Context context) { if ( area == null ){ throw new IllegalArgumentException( "No area is defined for image command" ); } Transformer transformer = getTransformer(); Size size = area.getSize(); //获取图片显示区域是时候，多加一行和一列，获取完之后再恢复原来大小 size.setWidth(size.getWidth() + 1 ); size.setHeight(size.getHeight() + 1 ); AreaRef areaRef = new AreaRef(cellRef, size); size.setWidth(size.getWidth() - 1 ); size.setHeight(size.getHeight() - 1 ); byte [] imgBytes = imageBytes; if ( src != null ){ Object imgObj = getTransformationConfig().getExpressionEvaluator().evaluate(src, context.toMap()); if (imgObj != null ){ if ( !(imgObj instanceof byte []) ){ throw new IllegalArgumentException( "src value must contain image bytes (byte[])" ); } imgBytes = ( byte []) imgObj; } } if (imgBytes != null ){ transformer.addImage(areaRef, imgBytes, imageType); } area.applyAt(cellRef, context); //恢复原有的样式 if (imgBytes == null && StringUtils.isNotBlank(text)){ PoiTransformer poi = (PoiTransformer)transformer; Sheet sheet = poi.getWorkbook().getSheet(cellRef.getSheetName()); Row row = sheet.getRow(cellRef.getRow()); if (row != null && row.getCell(cellRef.getCol()) != null ){ row.getCell(cellRef.getCol()).setCellValue(text); } } return size; } public String getText() { return text; } public void setText(String text) { this .text = text; } }LinkCommand.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 /** * url超链接 */ public class LinkCommand extends AbstractCommand { private String url; //url地址（必选） private String title; //url显示标题（可选） private Area area; @Override public String getName() { return "merge" ; } @Override public Command addArea(Area area) { if ( super .getAreaList().size() >= 1 ) { throw new IllegalArgumentException( "You can add only a single area to 'link' command" ); } this .area = area; return super .addArea(area); } @Override public Size applyAt(CellRef cellRef, Context context) { if (StringUtils.isBlank(url)){ throw new NullPointerException( "url不能为空" ); } area.applyAt(cellRef, context); Transformer transformer = this .getTransformer(); if (transformer instanceof PoiTransformer){ poiLink(cellRef, context, (PoiTransformer)transformer); } else if (transformer instanceof JexcelTransformer){ jxcelLink(cellRef, context, (JexcelTransformer)transformer); } return new Size( 1 , 1 ); } protected void poiLink(CellRef cellRef, Context context, PoiTransformer transformer){ Object urlObj = getTransformationConfig().getExpressionEvaluator().evaluate(url, context.toMap()); if (urlObj == null ) return ; String url = urlObj.toString(); String title = url; if (StringUtils.isNotBlank( this .title)){ Object titleObj = getTransformationConfig().getExpressionEvaluator().evaluate( this .title, context.toMap()); if (titleObj != null ) title = titleObj.toString(); } Sheet sheet = transformer.getWorkbook().getSheet(cellRef.getSheetName()); Row row = sheet.getRow(cellRef.getRow()); if (row == null ){ row = sheet.createRow(cellRef.getRow()); } Cell cell = row.getCell(cellRef.getCol()); if (cell == null ){ cell = row.createCell(cellRef.getCol()); } cell.setCellType(HSSFCell.CELL_TYPE_FORMULA); cell.setCellFormula( "HYPERLINK(\"" + url+ "\",\"" + title + "\")" ); if (!url.equals(title)){ cell.setCellValue(title); } CellStyle linkStyle = cell.getCellStyle(); Font cellFont= transformer.getWorkbook().createFont(); cellFont.setUnderline(( byte ) 1 ); cellFont.setColor(HSSFColor.BLUE.index); linkStyle.setFont(cellFont); } protected void jxcelLink(CellRef cellRef, Context context, JexcelTransformer transformer){ } public String getUrl() { return url; } public void setUrl(String url) { this .url = url; } public String getTitle() { return title; } public void setTitle(String title) { this .title = title; } }MergeCommand.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 /** * @author lk * 合并单元格命令 */ public class MergeCommand extends AbstractCommand { private String cols; //合并的列数 private String rows; //合并的行数 private Area area; private CellStyle cellStyle; //第一个单元格的样式 @Override public String getName() { return "merge" ; } @Override public Command addArea(Area area) { if ( super .getAreaList().size() >= 1 ) { throw new IllegalArgumentException( "You can add only a single area to 'merge' command" ); } this .area = area; return super .addArea(area); } @Override public Size applyAt(CellRef cellRef, Context context) { int rows = 1 , cols = 1 ; if (StringUtils.isNotBlank( this .rows)){ Object rowsObj = getTransformationConfig().getExpressionEvaluator().evaluate( this .rows, context.toMap()); if (rowsObj != null && NumberUtils.isDigits(rowsObj.toString())){ rows = NumberUtils.toInt(rowsObj.toString()); } } if (StringUtils.isNotBlank( this .cols)){ Object colsObj = getTransformationConfig().getExpressionEvaluator().evaluate( this .cols, context.toMap()); if (colsObj != null && NumberUtils.isDigits(colsObj.toString())){ cols = NumberUtils.toInt(colsObj.toString()); } } if (rows > 1 || cols > 1 ){ Transformer transformer = this .getTransformer(); if (transformer instanceof PoiTransformer){ return poiMerge(cellRef, context, (PoiTransformer)transformer, rows, cols); } else if (transformer instanceof JexcelTransformer){ return jexcelMerge(cellRef, context, (JexcelTransformer)transformer, rows, cols); } } area.applyAt(cellRef, context); return new Size( 1 , 1 ); } protected Size poiMerge(CellRef cellRef, Context context, PoiTransformer transformer, int rows, int cols){ Sheet sheet = transformer.getWorkbook().getSheet(cellRef.getSheetName()); CellRangeAddress region = new CellRangeAddress( cellRef.getRow(), cellRef.getRow() + rows - 1 , cellRef.getCol(), cellRef.getCol() + cols - 1 ); sheet.addMergedRegion(region); //合并之后单元格样式会丢失，以下操作将合并后的单元格恢复成合并前第一个单元格的样式 area.applyAt(cellRef, context); if (cellStyle == null ){ PoiCellData cellData = (PoiCellData)transformer.getCellData(cellRef); cellStyle = cellData.getCellStyle(); } setRegionStyle(cellStyle, region, sheet); return new Size(cols, rows); } protected Size jexcelMerge(CellRef cellRef, Context context, JexcelTransformer transformer, int rows, int cols){ try { transformer.getWritableWorkbook().getSheet(cellRef.getSheetName()) .mergeCells( cellRef.getRow(), cellRef.getCol(), cellRef.getRow() + rows - 1 , cellRef.getCol() + cols - 1 ); area.applyAt(cellRef, context); } catch (WriteException e) { throw new IllegalArgumentException( "合并单元格失败" ); } return new Size(cols, rows); } private static void setRegionStyle(CellStyle cs, CellRangeAddress region, Sheet sheet) { for ( int i = region.getFirstRow(); i <= region.getLastRow(); i++) { Row row = sheet.getRow(i); if (row == null ) row = sheet.createRow(i); for ( int j = region.getFirstColumn(); j <= region.getLastColumn(); j++) { Cell cell = row.getCell(j); if (cell == null ) { cell = row.createCell(j); } cell.setCellStyle(cs); } } } public String getCols() { return cols; } public void setCols(String cols) { this .cols = cols; } public String getRows() { return rows; } public void setRows(String rows) { this .rows = rows; } }项目源码下载 jxls 2.3.0下载 项目所依赖的jar包下载
