java生成详细的excel文件
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1 import java.io.ByteArrayInputStream; 2 import java.io.ByteArrayOutputStream; 3 import java.io.InputStream; 4 import java.io.UnsupportedEncodingException; 5 import java.lang.reflect.Array; 6 import java.lang.reflect.InvocationTargetException; 7 import java.lang.reflect.Method; 8 import java.text.SimpleDateFormat; 9 import java.util.List; 10 import java.util.regex.Matcher; 11 import java.util.regex.Pattern; 12 13 import org.apache.poi.hssf.usermodel.HSSFWorkbook; 14 import org.apache.poi.ss.usermodel.Cell; 15 import org.apache.poi.ss.usermodel.CellStyle; 16 import org.apache.poi.ss.usermodel.Font; 17 import org.apache.poi.ss.usermodel.IndexedColors; 18 import org.apache.poi.ss.usermodel.Row; 19 import org.apache.poi.ss.usermodel.Sheet; 20 import org.apache.poi.ss.usermodel.Workbook; 21 22 import com.gzbugu.action.ActionBase; 23 import com.gzbugu.domain.BusiObservePlan; 24 25 /** 26 * @author ylh 27 */ 28 public class ExcelAction extends ActionBase{ 29 30 private List downExcelAttrsList; 31 private String fileName; 32 33 /** 34 * 导出Excel公共方法 35 * 使用action模板配置文件： 36 <action name="自定义" class="自定义" method="自定义"> 37 <result name="success" type="chain"> 38 <param name="actionName">getDownloadExcel</param> 39 <param name="downExcelAttrsList">${downExcelAttrsList}</param> 40 </result> 41 </action> 42 * 必须的参数downExcelAttrsList，必须是有setter,getter方法的属性，其包括参数顺序如下： 43 * @param valueList 必须，通过hql查询数据库后返回的对象List,支持关联查询,在属性前加上对象名: {"BusiObservePlan.planType,0:个人计划,1:部门月度计划",...} 44 * @param sheetName 必须，Excel的sheet的名字， 45 * @param beanPropertyNames 必须，对象中需要被输出的值,如果是状态值需要被替换的，则如此填写： {"propertyName,0:个人计划,1:部门月度计划", ...} 46 * @param titleNames 必须，对应上面属性的名字，用来做Excel的表头 47 * @param fileName 可选，生成的excel名称，如果没有，则默认是sheetName 48 */ 49 public InputStream getDownloadExcel(){ 50 final List list = (List)downExcelAttrsList.get(0); 51 final String sheetName = (String)downExcelAttrsList.get(1); 52 final String[] beanPropertyNames = (String[])downExcelAttrsList.get(2); 53 final String[] titleNames = (String[])downExcelAttrsList.get(3); 54 if(downExcelAttrsList.size()>=5) { 55 fileName = (String)downExcelAttrsList.get(4); 56 }else{ 57 fileName = sheetName; 58 } 59 if(!fileName.contains(".xls")){ 60 fileName = fileName + ".xls"; 61 } 62 InputStream is = null; 63 try { 64 is = this.createExcelFile(list, sheetName, beanPropertyNames, titleNames); 65 } catch (Exception e1) { 66 e1.printStackTrace(); 67 } 68 try { 69 fileName = new String(fileName.getBytes("UTF-8"),"ISO-8859-1"); 70 } catch (UnsupportedEncodingException e) { 71 e.printStackTrace(); 72 } 73 if(null==is) System.out.print("shit..."); 74 return is; 75 } 76 77 /** 78 * 生成Excel表 79 */ 80 private InputStream createExcelFile(List valueList, String sheetName, String[] beanPropertyNames, String[] titleNames) throws Exception{ 81 Workbook wb = new HSSFWorkbook(); 82 Sheet sheet = wb.createSheet(sheetName); 83 //单元格默认宽度为20 84 sheet.setDefaultColumnWidth(20); 85 Cell cell; 86 87 //表头 88 Row headerRow = sheet.createRow(0); 89 headerRow.setHeightInPoints(18f); 90 for (int i = 0; i < titleNames.length; i++) { 91 cell = headerRow.createCell(i); 92 cell.setCellValue(titleNames[i]); 93 cell.setCellStyle(this.getHeaderCellStyle(wb)); 94 } 95 96 //freeze the first row 97 sheet.createFreezePane(0, 1); 98 99 Row row; 100 int rownum = 1, listSize = valueList.size(), beanPropertyNamesLength = beanPropertyNames.length; 101 for (int i = 0; i < listSize; i++, rownum++) { 102 row = sheet.createRow(rownum); 103 Object currentObj = valueList.get(i); 104 for ( int j=0; j < beanPropertyNamesLength; j++ ) { 105 cell = row.createCell(j); 106 cell.setCellStyle(this.getContentCellStyle(wb)); 107 Object value = this.getPropertyValue(currentObj, beanPropertyNames[j]); 108 this.getCellSetValue(cell, value); 109 } 110 } 111 112 //将输出流转化为输入流 113 ByteArrayOutputStream out = new ByteArrayOutputStream(); 114 wb.write(out); 115 return new ByteArrayInputStream(out.toByteArray()); 116 } 117 118 /** 119 * 设置单元格值 120 * @param cell 121 * @param value 122 */ 123 private void getCellSetValue(Cell cell, Object value){ 124 String type = value.getClass().toString().toLowerCase(); 125 if(type.endsWith("integer")){ 126 cell.setCellValue((Integer)value); 127 }else if(type.endsWith("double")){ 128 cell.setCellValue((Double)value); 129 }else if(type.endsWith("timestamp")){ 130 cell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm").format(value).toString()); 131 }else{ 132 String val = (String)value; 133 Pattern pattern = Pattern.compile("<\w*\s*/?>"); 134 Matcher matcher = pattern.matcher(val); 135 String v = matcher.replaceAll(""); 136 //将结束符号替换为：。 137 pattern = Pattern.compile("</\w*\s*/?>"); 138 matcher = pattern.matcher(v); 139 v = matcher.replaceAll("。"); 140 cell.setCellValue(v); 141 } 142 } 143 144 /** 145 * 获得bean对象中对应属性的值 146 * @param obj 147 * @param propertyName 148 * @return 149 */ 150 private Object getPropertyValue(Object obj,String beanPropertyName){ 151 final String[] property = beanPropertyName.split(","); 152 final String[] beanNameAndPropertyName = property[0].split("\."); 153 final String beanName = beanNameAndPropertyName[0].toLowerCase(); 154 final String propertyName = beanNameAndPropertyName[1]; 155 Object value = ""; 156 Method met = null; 157 158 //关联查询 159 if(obj.getClass().isArray()){ 160 int objLength = Array.getLength(obj); 161 Object[] currentObjectArray = (Object[])obj; 162 for(int j=0;j<objLength;j++){ 163 Object currentObject = currentObjectArray[j]; 164 String currentObjectBeanName = currentObject.getClass().getSimpleName().toLowerCase(); 165 if(currentObjectBeanName.equals(beanName)){ 166 try { 167 met = currentObject.getClass().getMethod(this.getterMethodName(propertyName)); 168 } catch (SecurityException e) { 169 e.printStackTrace(); 170 } catch (NoSuchMethodException e) { 171 e.printStackTrace(); 172 } 173 try { 174 value = met.invoke(currentObject); 175 } catch (IllegalArgumentException e) { 176 e.printStackTrace(); 177 } catch (IllegalAccessException e) { 178 e.printStackTrace(); 179 } catch (InvocationTargetException e) { 180 e.printStackTrace(); 181 } 182 } 183 } 184 }else{ 185 //属性的形式为： 对象.属性 186 if(beanNameAndPropertyName.length>1){ 187 try { 188 met = obj.getClass().getMethod(this.getterMethodName(propertyName)); 189 } catch (SecurityException e1) { 190 e1.printStackTrace(); 191 } catch (NoSuchMethodException e1) { 192 e1.printStackTrace(); 193 } 194 try { 195 value = met.invoke(obj); 196 } catch (IllegalArgumentException e) { 197 e.printStackTrace(); 198 } catch (IllegalAccessException e) { 199 e.printStackTrace(); 200 } catch (InvocationTargetException e) { 201 e.printStackTrace(); 202 } 203 }else{ 204 //属性的形式为： 属性 205 try { 206 met = obj.getClass().getMethod(this.getterMethodName(property[0])); 207 } catch (SecurityException e) { 208 e.printStackTrace(); 209 } catch (NoSuchMethodException e) { 210 e.printStackTrace(); 211 } 212 try { 213 value = met.invoke(obj); 214 } catch (IllegalArgumentException e) { 215 e.printStackTrace(); 216 } catch (IllegalAccessException e) { 217 e.printStackTrace(); 218 } catch (InvocationTargetException e) { 219 e.printStackTrace(); 220 } 221 } 222 } 223 224 //状态值替换 225 if(property.length>1){ 226 value = this.replaceValue(property, value); 227 } 228 229 return value; 230 } 231 232 /** 233 * 根据内容来替换对应的状态值 234 * @param propertyContent 235 * @param value 236 * @return 237 */ 238 private Object replaceValue(String[] propertyContent, Object value){ 239 int len = propertyContent.length; 240 String name = value.getClass().getSimpleName().toLowerCase(); 241 for(int i=1;i<len;i++){ 242 String[] statusValueAndReplaceValue = propertyContent[i].split(":"); 243 if("integer".equals(name)&&Integer.parseInt(statusValueAndReplaceValue[0])==(Integer)value){ 244 value = statusValueAndReplaceValue[1]; 245 break; 246 } 247 } 248 return value; 249 } 250 251 /** 252 * 根据属性名字获得对应的bean对象的getter名字 253 * @param beanPropertyName bean对象的属性名字 254 * @return 255 */ 256 private String getterMethodName(String beanPropertyName){ 257 String name = "get"+beanPropertyName.substring(0, 1).toUpperCase()+beanPropertyName.substring(1); 258 return name; 259 } 260 261 /** 262 * 表头样式 263 * @param wb 264 * @return 265 */ 266 private CellStyle getHeaderCellStyle(Workbook wb){ 267 Font headerFont = wb.createFont(); 268 headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD); 269 CellStyle style = createBorderedStyle(wb); 270 style.setAlignment(CellStyle.ALIGN_CENTER); 271 style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex()); 272 style.setFillPattern(CellStyle.SOLID_FOREGROUND); 273 style.setFont(headerFont); 274 return style; 275 } 276 277 /** 278 * 单元格边框样式 279 * @param wb 280 * @return 281 */ 282 private CellStyle createBorderedStyle(Workbook wb){ 283 CellStyle style = wb.createCellStyle(); 284 style.setBorderRight(CellStyle.BORDER_THIN); 285 style.setRightBorderColor(IndexedColors.BLACK.getIndex()); 286 style.setBorderBottom(CellStyle.BORDER_THIN); 287 style.setBottomBorderColor(IndexedColors.BLACK.getIndex()); 288 style.setBorderLeft(CellStyle.BORDER_THIN); 289 style.setLeftBorderColor(IndexedColors.BLACK.getIndex()); 290 style.setBorderTop(CellStyle.BORDER_THIN); 291 style.setTopBorderColor(IndexedColors.BLACK.getIndex()); 292 return style; 293 } 294 295 /** 296 * 内容部分单元格样式 297 * @param wb 298 * @return 299 */ 300 private CellStyle getContentCellStyle(Workbook wb){ 301 CellStyle style = createBorderedStyle(wb); 302 style.setAlignment(CellStyle.ALIGN_CENTER); 303 return style; 304 } 305 306 public List getDownExcelAttrsList() { 307 return downExcelAttrsList; 308 } 309 310 public void setDownExcelAttrsList(List downExcelAttrsList) { 311 this.downExcelAttrsList = downExcelAttrsList; 312 } 313 314 public String getFileName() { 315 return fileName; 316 } 317 318 public void setFileName(String fileName) { 319 this.fileName = fileName; 320 } 321 }
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