简介:
工具类支持 2003/2007 excel
主要根据 excel 模板上的某一行指定 Java bean 的属性列名,再使用 java 反射,进行实体对象的构造
使用者可以根据业务需要对该工具类自行扩展
模板样式:
代码实现:
import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.ss.usermodel.*; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by xiaofeng.he on 2018/06/22 * poi 实现 excel 导入 工具类 */ public class ImportExcelUtil { //正则表达式 用于匹配属性的第一个字母 private static final String REGEX = "[a-zA-Z]"; /** * Excel数据转 list * @param originUrl Excel表的所在路径 * @param datePattern 日期格式 如"yyyy-MM-dd hh:mm:ss" * @param filedsIndex 模板定义的属性名的行位置 * @param startRow 从第几行开始 * @param endRow 到第几行结束 (0表示所有行;正数表示到第几行结束;负数表示到倒数第几行结束) * @param clazz 要返回的对象集合的类型 * @param* @return * @throws IOException */ public static <T> List<T> importExcel(String originUrl, String datePattern, int filedsIndex, int startRow, int endRow, Class<T> clazz) throws IOException { // 判断文件是否存在 File file = new File(originUrl); if (!file.exists()) { throw new IOException("文件名为" + file.getName() + "Excel文件不存在!"); } InputStream fis = new FileInputStream(file); return doImportExcel(fis, datePattern, filedsIndex, startRow, endRow, clazz); } /** * Excel数据转 list * @param inputStream Excel文件输入流 * @param datePattern 日期格式 如"yyyy-MM-dd hh:mm:ss" * @param filedsIndex 模板定义的属性名的行位置 * @param startRow 从第几行开始 * @param endRow 到第几行结束 (0表示所有行;正数表示到第几行结束;负数表示到倒数第几行结束) * @param clazz 要返回的对象集合的类型 * @param * @return * @throws IOException */ public static <T> List<T> importExcel(InputStream inputStream, String datePattern, int filedsIndex, int startRow, int endRow, Class<T> clazz) throws IOException { return doImportExcel(inputStream, datePattern, filedsIndex, startRow, endRow, clazz); } /** * 真正实现 * @param inputStream * @param datePattern * @param filedsIndex * @param startRow * @param endRow * @param clazz * @param * @return * @throws IOException */ private static <T> List<T> doImportExcel(InputStream inputStream, String datePattern, int filedsIndex, int startRow, int endRow, Class<T> clazz) throws IOException { Workbook wb; Sheet sheet; Row filedsRow = null; List<Row> rowList = new ArrayList<>(); try { // 去读Excel // HSSFWorkbook wb = new HSSFWorkbook(fis); // 使用workbook 支持2003/2007 wb = WorkbookFactory.create(inputStream); sheet = wb.getSheetAt(0); // 获取最后行号 int lastRowNum = sheet.getLastRowNum(); int rowLength = lastRowNum; if (endRow > 0) { rowLength = endRow; } else if (endRow < 0) { rowLength = lastRowNum + endRow; } // 获取属性列字段 filedsRow = sheet.getRow(filedsIndex); // 循环读取 Row row; for (int i = startRow; i <= rowLength; i++) { row = sheet.getRow(i); rowList.add(row); } } catch (IOException e) { e.printStackTrace(); throw e; } catch (InvalidFormatException e1) { e1.printStackTrace(); } return returnObjectList(datePattern, filedsRow, rowList, clazz); } /** * 功能:返回指定的对象集合 */ private static <T>List<T> returnObjectList(String datePattern, Row filedsRow, List<Row> rowList,Class<T> clazz) { List<T> objectList=new ArrayList<>(); try { T obj; String attribute; String value; for (Row row : rowList) { obj = clazz.newInstance(); for (int j = 0; j < filedsRow.getLastCellNum(); j++) { attribute = getCellValue(filedsRow.getCell(j)); if (!attribute.equals("")) { value = getCellValue(row.getCell(j)); setAttrributeValue(obj, attribute, value, datePattern); } } objectList.add(obj); } } catch (Exception e) { e.printStackTrace(); } return objectList; } /** * 功能:获取单元格的值 */ private static String getCellValue(Cell cell) { Object result = ""; if (cell != null) { switch (cell.getCellType()) { case Cell.CELL_TYPE_STRING: result = cell.getStringCellValue(); break; case Cell.CELL_TYPE_NUMERIC: result = cell.getNumericCellValue(); break; case Cell.CELL_TYPE_BOOLEAN: result = cell.getBooleanCellValue(); break; case Cell.CELL_TYPE_FORMULA: result = cell.getCellFormula(); break; case Cell.CELL_TYPE_ERROR: result = cell.getErrorCellValue(); break; case Cell.CELL_TYPE_BLANK: break; default: break; } } return result.toString(); } /** * 功能:给指定对象的指定属性赋值 */ private static void setAttrributeValue(Object obj,String attribute,String value, String datePattern) { //得到该属性的set方法名 String method_name = convertToMethodName(attribute,obj.getClass(),true); Method[] methods = obj.getClass().getMethods(); for (Method method : methods) { /** * 因为这里只是调用bean中属性的set方法,属性名称不能重复 * 所以set方法也不会重复,所以就直接用方法名称去锁定一个方法 * (注:在java中,锁定一个方法的条件是方法名及参数) */ if(method.getName().equals(method_name)) { Class>[] parameterC = method.getParameterTypes(); try { /**如果是(整型,浮点型,布尔型,字节型,时间类型), * 按照各自的规则把value值转换成各自的类型 * 否则一律按类型强制转换(比如:String类型) */ if(parameterC[0] == int.class || parameterC[0]==java.lang.Integer.class) { if(value != null && value.length() > 0) { value = value.substring(0, value.lastIndexOf(".")); method.invoke(obj,Integer.valueOf(value)); } break; } else if(parameterC[0] == long.class || parameterC[0]==java.lang.Long.class) { if(value != null && value.length() > 0) { value = value.substring(0, value.lastIndexOf(".")); method.invoke(obj,Long.valueOf(value)); } break; } else if(parameterC[0] == float.class || parameterC[0]==java.lang.Float.class) { if(value != null && value.length() > 0) { method.invoke(obj, Float.valueOf(value)); } break; } else if(parameterC[0] == double.class || parameterC[0]==java.lang.Double.class) { if(value != null && value.length() > 0) { method.invoke(obj, Double.valueOf(value)); } break; } else if(parameterC[0] == byte.class || parameterC[0]==java.lang.Byte.class) { if(value != null && value.length() > 0) { method.invoke(obj, Byte.valueOf(value)); } break; } else if(parameterC[0] == boolean.class|| parameterC[0]==java.lang.Boolean.class) { if (value != null && value.length() > 0) { method.invoke(obj, Boolean.valueOf(value)); } break; } else if(parameterC[0] == java.util.Date.class) { if(value != null && value.length() > 0) { SimpleDateFormat sdf = new SimpleDateFormat(datePattern); Date date=null; try { date=sdf.parse(value); } catch (Exception e) { e.printStackTrace(); } method.invoke(obj,date); } break; } else if(parameterC[0] == java.math.BigDecimal.class) { if (value != null && value.length() > 0) { method.invoke(obj, new BigDecimal(value)); } break; } else { if (value != null && value.length() > 0) { method.invoke(obj,parameterC[0].cast(value)); } break; } } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } catch (SecurityException e) { e.printStackTrace(); } } } } /** * 功能:根据属性生成对应的set/get方法 */ private static String convertToMethodName(String attribute,Class> objClass,boolean isSet) { /** 通过正则表达式来匹配第一个字符 **/ Pattern p = Pattern.compile(REGEX); Matcher m = p.matcher(attribute); StringBuilder sb = new StringBuilder(); /** 如果是set方法名称 **/ if(isSet) { sb.append("set"); } else { /** get方法名称 **/ try { Field attributeField = objClass.getDeclaredField(attribute); /** 如果类型为boolean **/ if(attributeField.getType() == boolean.class||attributeField.getType() == Boolean.class) { sb.append("is"); } else { sb.append("get"); } } catch (SecurityException e) { e.printStackTrace(); } catch (NoSuchFieldException e) { e.printStackTrace(); } } /** 针对以下划线开头的属性 **/ if(attribute.charAt(0)!='_' && m.find()) { sb.append(m.replaceFirst(m.group().toUpperCase())); } else { sb.append(attribute); } return sb.toString(); } }
调用示例:
import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Transient; import javax.validation.constraints.NotNull; import java.io.IOException; import java.math.BigDecimal; import java.util.List; /** * Created by xiaofeng.he on 2018/06/22 * 测试类 */ public class APP { public static void main(String[] args) { String originUrl="D:\\doc\\prepayment_template.xls"; int startRow=2; int endRow=-1; int filedsIndex = 0; List<ApRequisitionLine> linesList; try { linesList = ImportExcelUtil.importExcel(originUrl,"yyyy-MM-dd HH:mm:ss", filedsIndex, startRow, endRow, ApRequisitionLine.class); for (ApRequisitionLine lines : linesList) { System.out.println(lines); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static class ApRequisitionLine extends AA { private Long requisitionLineId; private Long requisitionId; private Long lineNum; private String expenseTypeCode; private String soNumber; private Long soLineNum; private String poNumber; private Long poLineNum; private String parkNumber; private String projectNum; private String internalOrderNumber; private BigDecimal lineAmount; private BigDecimal baseLineAmount; private BigDecimal contractAmount; private BigDecimal prepayRatio; private String costcentreCode; private String profitCentre; private String factoryCode; private String customsDeclarationNum; private Long chargeAmount; private String drCrDirection;//借贷方向,HSS_GA_DR_CR_DIRECTION private String account; private String sgl; private String customerCode; private String comments; private String costcentreName;//成本中心名称 private String profitCentreName;//利润中心名称 private String companyCode;//公司编码 private String sglMeaning;//sgl名称 private String flexValueMeaning;//成本中心含义 public void setRequisitionLineId(Long requisitionLineId) { this.requisitionLineId = requisitionLineId; } public Long getRequisitionLineId() { return requisitionLineId; } public void setRequisitionId(Long requisitionId) { this.requisitionId = requisitionId; } public Long getRequisitionId() { return requisitionId; } public void setLineNum(Long lineNum) { this.lineNum = lineNum; } public Long getLineNum() { return lineNum; } public void setExpenseTypeCode(String expenseTypeCode) { this.expenseTypeCode = expenseTypeCode; } public String getExpenseTypeCode() { return expenseTypeCode; } public void setSoNumber(String soNumber) { this.soNumber = soNumber; } public String getSoNumber() { return soNumber; } public void setSoLineNum(Long soLineNum) { this.soLineNum = soLineNum; } public Long getSoLineNum() { return soLineNum; } public void setPoNumber(String poNumber) { this.poNumber = poNumber; } public String getPoNumber() { return poNumber; } public void setPoLineNum(Long poLineNum) { this.poLineNum = poLineNum; } public Long getPoLineNum() { return poLineNum; } public void setParkNumber(String parkNumber) { this.parkNumber = parkNumber; } public String getParkNumber() { return parkNumber; } public void setProjectNum(String projectNum) { this.projectNum = projectNum; } public String getProjectNum() { return projectNum; } public void setInternalOrderNumber(String internalOrderNumber) { this.internalOrderNumber = internalOrderNumber; } public String getInternalOrderNumber() { return internalOrderNumber; } public BigDecimal getLineAmount() { return lineAmount; } public void setLineAmount(BigDecimal lineAmount) { this.lineAmount = lineAmount; } public BigDecimal getBaseLineAmount() { return baseLineAmount; } public void setBaseLineAmount(BigDecimal baseLineAmount) { this.baseLineAmount = baseLineAmount; } public BigDecimal getContractAmount() { return contractAmount; } public void setContractAmount(BigDecimal contractAmount) { this.contractAmount = contractAmount; } public BigDecimal getPrepayRatio() { return prepayRatio; } public void setPrepayRatio(BigDecimal prepayRatio) { this.prepayRatio = prepayRatio; } public void setCostcentreCode(String costcentreCode) { this.costcentreCode = costcentreCode; } public String getCostcentreCode() { return costcentreCode; } public void setProfitCentre(String profitCentre) { this.profitCentre = profitCentre; } public String getProfitCentre() { return profitCentre; } public void setFactoryCode(String factoryCode) { this.factoryCode = factoryCode; } public String getFactoryCode() { return factoryCode; } public void setCustomsDeclarationNum(String customsDeclarationNum) { this.customsDeclarationNum = customsDeclarationNum; } public String getCustomsDeclarationNum() { return customsDeclarationNum; } public void setChargeAmount(Long chargeAmount) { this.chargeAmount = chargeAmount; } public Long getChargeAmount() { return chargeAmount; } public String getDrCrDirection() { return drCrDirection; } public void setDrCrDirection(String drCrDirection) { this.drCrDirection = drCrDirection; } public void setAccount(String account) { this.account = account; } public String getAccount() { return account; } public void setSgl(String sgl) { this.sgl = sgl; } public String getSgl() { return sgl; } public void setCustomerCode(String customerCode) { this.customerCode = customerCode; } public String getCustomerCode() { return customerCode; } public void setComments(String comments) { this.comments = comments; } public String getComments() { return comments; } public String getCostcentreName() { return costcentreName; } public void setCostcentreName(String costcentreName) { this.costcentreName = costcentreName; } public String getProfitCentreName() { return profitCentreName; } public void setProfitCentreName(String profitCentreName) { this.profitCentreName = profitCentreName; } public String getCompanyCode() { return companyCode; } public void setCompanyCode(String companyCode) { this.companyCode = companyCode; } public String getSglMeaning() { return sglMeaning; } public void setSglMeaning(String sglMeaning) { this.sglMeaning = sglMeaning; } public String getFlexValueMeaning() { return flexValueMeaning; } public void setFlexValueMeaning(String flexValueMeaning) { this.flexValueMeaning = flexValueMeaning; } public String toString() { return "ApRequisitionLines{" + "requisitionLineId=" + requisitionLineId + ", requisitionId=" + requisitionId + ", lineNum=" + lineNum + ", expenseTypeCode='" + expenseTypeCode + '\'' + ", soNumber='" + soNumber + '\'' + ", soLineNum=" + soLineNum + ", poNumber='" + poNumber + '\'' + ", poLineNum=" + poLineNum + ", parkNumber='" + parkNumber + '\'' + ", projectNum='" + projectNum + '\'' + ", internalOrderNumber='" + internalOrderNumber + '\'' + ", lineAmount=" + lineAmount + ", baseLineAmount=" + baseLineAmount + ", contractAmount=" + contractAmount + ", prepayRatio=" + prepayRatio + ", costcentreCode='" + costcentreCode + '\'' + ", profitCentre='" + profitCentre + '\'' + ", factoryCode='" + factoryCode + '\'' + ", customsDeclarationNum='" + customsDeclarationNum + '\'' + ", chargeAmount=" + chargeAmount + ", drCrDirection='" + drCrDirection + '\'' + ", account='" + account + '\'' + ", sgl='" + sgl + '\'' + ", customerCode='" + customerCode + '\'' + ", comments='" + comments + '\'' + ", costcentreName='" + costcentreName + '\'' + ", profitCentreName='" + profitCentreName + '\'' + ", companyCode='" + companyCode + '\'' + ", sglMeaning='" + sglMeaning + '\'' + ", flexValueMeaning='" + flexValueMeaning + '\'' + '}'; } } public static class AA { String aa; } }
特别声明:
实现思路参照了:http://blog.csdn.net/jml1437710575/article/details/52051278
感谢:
@JML
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