这篇文章主要介绍了java实现文件导入导出的方法和具体示例代码，非常的简单实用，有需要的小伙伴可以参考下
ExportExcel.java
/** * copyright © 2012-2014 JeeSite All rights reserved. */ package com.thinkgem.jeesite.common.utils.excel; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.text.DecimalFormat; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.HashMap; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang3.StringUtils; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Comment; import org.apache.poi.ss.usermodel.DataFormat; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.ss.usermodel.IndexedColors; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.streaming.sxssfWorkbook; import org.apache.poi.xssf.usermodel.XSSFClientAnchor; import org.apache.poi.xssf.usermodel.XSSFRichTextString; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.common.collect.Lists; import com.thinkgem.jeesite.common.utils.DateUtils; import com.thinkgem.jeesite.common.utils.Encodes; import com.thinkgem.jeesite.common.utils.Reflections; import com.thinkgem.jeesite.common.utils.excel.annotation.ExcelField; import com.thinkgem.jeesite.modules.sys.utils.DictUtils; /** * 导出Excel文件（导出“XLSX”格式，支持大数据量导出 @see org.apache.poi.ss.SpreadsheetVersion） * @author ThinkGem * @version 2013-04-21 */ public class ExportExcel { private static Logger log = LoggerFactory.getLogger(ExportExcel.class); /** * 工作薄对象 */ private sxssfWorkbook wb; /** * 工作表对象 */ private Sheet sheet; /** * 样式列表 */ private Map styles; /** * 当前行号 */ private int rownum; /** * 注解列表（Object[]{ ExcelField, Field/Method }） */ List annotationList = Lists.newArrayList(); /** * 字段map */ LinkedHashMap fieldMap; HashMap dictTypes; /** * 构造函数 * @param title 表格标题，传“空值”，表示无标题 * @param cls 实体对象，通过annotation.ExportField获取标题 */ public ExportExcel(String title, Class> cls){ this(title, cls, 1); } /** * 构造函数 * @param title 表格标题，传“空值”，表示无标题 * @param fieldMap，获取要导出的字段和字段标题 */ public ExportExcel(String title, LinkedHashMap fieldMap){ this.fieldMap = fieldMap; dictTypes = new HashMap(); // Initialize int colunm = 0; List headerList = Lists.newArrayList(); for (String key : fieldMap.keySet()){ String t = fieldMap.get(key); HashMap map = com.thinkgem.jeesite.common.utils.StringUtils.toMap(t, ";", "=", false); if(map.get("name") != null){ t = map.get("name"); } if(map.get("dictType") != null){ dictTypes.put(""+(colunm), map.get("dictType")); } colunm++; headerList.add(t); } initialize(title, headerList); } /** * 构造函数 * @param title 表格标题，传“空值”，表示无标题 * @param cls 实体对象，通过annotation.ExportField获取标题 * @param type 导出类型（1:导出数据；2：导出模板） * @param groups 导入分组 */ public ExportExcel(String title, Class> cls, int type, int... groups){ // Get annotation field Field[] fs = cls.getDeclaredFields(); for (Field f : fs){ ExcelField ef = f.getAnnotation(ExcelField.class); if (ef != null && (ef.type()==0 || ef.type()==type)){ if (groups!=null && groups.length>0){ boolean inGroup = false; for (int g : groups){ if (inGroup){ break; } for (int efg : ef.groups()){ if (g == efg){ inGroup = true; annotationList.add(new Object[]{ef, f}); break; } } } }else{ annotationList.add(new Object[]{ef, f}); } } } // Get annotation method Method[] ms = cls.getDeclaredMethods(); for (Method m : ms){ ExcelField ef = m.getAnnotation(ExcelField.class); if (ef != null && (ef.type()==0 || ef.type()==type)){ if (groups!=null && groups.length>0){ boolean inGroup = false; for (int g : groups){ if (inGroup){ break; } for (int efg : ef.groups()){ if (g == efg){ inGroup = true; annotationList.add(new Object[]{ef, m}); break; } } } }else{ annotationList.add(new Object[]{ef, m}); } } } // Field sorting Collections.sort(annotationList, new Comparator() { public int compare(Object[] o1, Object[] o2) { return new Integer(((ExcelField)o1[0]).sort()).compareto( new Integer(((ExcelField)o2[0]).sort())); }; }); // Initialize List headerList = Lists.newArrayList(); for (Object[] os : annotationList){ String t = ((ExcelField)os[0]).title(); // 如果是导出，则去掉注释 if (type==1){ String[] ss = StringUtils.split(t, "**", 2); if (ss.length==2){ t = ss[0]; } } headerList.add(t); } initialize(title, headerList); } /** * 构造函数 * @param title 表格标题，传“空值”，表示无标题 * @param headers 表头数组 */ public ExportExcel(String title, String[] headers) { initialize(title, Lists.newArrayList(headers)); } /** * 构造函数 * @param title 表格标题，传“空值”，表示无标题 * @param headerList 表头列表 */ public ExportExcel(String title, List headerList) { initialize(title, headerList); } /** * 初始化函数 * @param title 表格标题，传“空值”，表示无标题 * @param headerList 表头列表 */ private void initialize(String title, List headerList) { this.wb = new sxssfWorkbook(500); this.sheet = wb.createSheet("Export"); this.styles = createStyles(wb); // Create title if (StringUtils.isNotBlank(title)){ Row titleRow = sheet.createRow(rownum++); titleRow.setHeightInPoints(30); Cell titleCell = titleRow.createCell(0); titleCell.setCellStyle(styles.get("title")); titleCell.setCellValue(title); sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(), titleRow.getRowNum(), titleRow.getRowNum(), headerList.size()-1)); } // Create header if (headerList == null){ throw new RuntimeException("headerList not null!"); } Row headerRow = sheet.createRow(rownum++); headerRow.setHeightInPoints(16); for (int i = 0; i 3000 : colwidth); } log.debug("initialize success.");> createStyles(Workbook wb) { Map styles = new HashMap(); CellStyle style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); Font titleFont = wb.createFont(); titleFont.setFontName("Arial"); titleFont.setFontHeightInPoints((short) 16); titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD); style.setFont(titleFont); styles.put("title", style); style = wb.createCellStyle(); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderLeft(CellStyle.BORDER_THIN); style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderTop(CellStyle.BORDER_THIN); style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); Font dataFont = wb.createFont(); dataFont.setFontName("Arial"); dataFont.setFontHeightInPoints((short) 10); style.setFont(dataFont); styles.put("data", style); style = wb.createCellStyle(); style.clonestyleFrom(styles.get("data")); style.setAlignment(CellStyle.ALIGN_LEFT); styles.put("data1", style); style = wb.createCellStyle(); style.clonestyleFrom(styles.get("data")); style.setAlignment(CellStyle.ALIGN_CENTER); styles.put("data2", style); style = wb.createCellStyle(); style.clonestyleFrom(styles.get("data")); style.setAlignment(CellStyle.ALIGN_RIGHT); styles.put("data3", style); style = wb.createCellStyle(); style.clonestyleFrom(styles.get("data")); // style.setWrapText(true); style.setAlignment(CellStyle.ALIGN_CENTER); style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setFillPattern(CellStyle.soLID_FOREGROUND); Font headerFont = wb.createFont(); headerFont.setFontName("Arial"); headerFont.setFontHeightInPoints((short) 10); headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD); headerFont.setColor(IndexedColors.WHITE.getIndex()); style.setFont(headerFont); styles.put("header", style); return styles; } /** * 添加一行 * @return 行对象 */ public Row addRow(){ return sheet.createRow(rownum++); } /** * 添加一个单元格 * @param row 添加的行 * @param column 添加列号 * @param val 添加值 * @return 单元格对象 */ public Cell addCell(Row row, int column, Object val){ return this.addCell(row, column, val, 0, Class.class); } /** * 添加一个单元格 * @param row 添加的行 * @param column 添加列号 * @param val 添加值 * @param align 对齐方式（1：靠左；2：居中；3：靠右） * @return 单元格对象 */ public Cell addCell(Row row, int column, Object val, int align, Class> fieldType){ Cell cell = row.createCell(column); CellStyle style = styles.get("data"+(align>=1&&align ExportExcel setDataList(List list){ for (E e : list){ int colunm = 0; Row row = this.addRow(); StringBuilder sb = new StringBuilder(); if(e instanceof Map){ @SuppressWarnings("unchecked") Map map = (Map)e; for(String key : fieldMap.keySet()){ Object value = map.get(key); String columnDictType = dictTypes.get(colunm+""); if (StringUtils.isNotBlank(columnDictType)){ value = DictUtils.getDictLabel(value==null?"":value.toString(), columnDictType, ""); } this.addCell(row, colunm++, value == null ? "" : value.toString(), 0, String.class); sb.append(value + ", "); } } else{ for (Object[] os : annotationList){ ExcelField ef = (ExcelField)os[0]; Object val = null; // Get entity value try{ if (StringUtils.isNotBlank(ef.value())){ val = Reflections.invokeGetter(e, ef.value()); }else{ if (os[1] instanceof Field){ val = Reflections.invokeGetter(e, ((Field)os[1]).getName()); }else if (os[1] instanceof Method){ val = Reflections.invokeMethod(e, ((Method)os[1]).getName(), new Class[] {}, new Object[] {}); } } // If is dict, get dict label if (StringUtils.isNotBlank(ef.dictType())){ val = DictUtils.getDictLabel(val==null?"":val.toString(), ef.dictType(), ""); } }catch(Exception ex) { // Failure to ignore log.info(ex.toString()); val = ""; } this.addCell(row, colunm++, val, ef.align(), ef.fieldType()); sb.append(val + ", "); } log.debug("Write success: ["+row.getRowNum()+"] "+sb.toString()); } } return this; } /** * 输出数据流 * @param os 输出数据流 */ public ExportExcel write(OutputStream os) throws IOException{ wb.write(os); return this; } /** * 输出到客户端 * @param fileName 输出文件名 */ public ExportExcel write(HttpServletResponse response, String fileName) throws IOException{ response.reset(); response.setContentType("application/octet-stream; charset=utf-8"); response.setHeader("Content-disposition", "attachment; filename="+Encodes.urlEncode(fileName)); write(response.getoutputStream()); return this; } /** * 输出到文件 * @param fileName 输出文件名 */ public ExportExcel writeFile(String name) throws FileNotFoundException, IOException{ FileOutputStream os = new FileOutputStream(name); this.write(os); return this; } /** * 清理临时文件 */ public ExportExcel dispose(){ wb.dispose(); return this; } }
导出测试
public static void main(String[] args) throws Throwable { List headerList = Lists.newArrayList(); for (int i = 1; i daTarowList = Lists.newArrayList(); for (int i = 1; i > dataList = Lists.newArrayList(); for (int i = 1; i
ImportExcel.java
/** * copyright © 2012-2014 JeeSite All rights reserved. */ package com.thinkgem.jeesite.common.utils.excel; 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.Method; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.List; import org.apache.commons.lang3.StringUtils; import org.apache.poi.hssf.usermodel.hssfWorkbook; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DateUtil; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.multipart.multipartfile; import com.google.common.collect.Lists; import com.thinkgem.jeesite.common.utils.Reflections; import com.thinkgem.jeesite.common.utils.excel.annotation.ExcelField; import com.thinkgem.jeesite.modules.sys.utils.DictUtils; /** * 导入Excel文件（支持“XLS”和“XLSX”格式） * @author ThinkGem * @version 2013-03-10 */ public class ImportExcel { private static Logger log = LoggerFactory.getLogger(ImportExcel.class); /** * 工作薄对象 */ private Workbook wb; /** * 工作表对象 */ private Sheet sheet; /** * 标题行号 */ private int headerNum; /** * 构造函数 * @param path 导入文件，读取第一个工作表 * @param headerNum 标题行号，数据行号=标题行号+1 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(String fileName, int headerNum) throws InvalidFormatException, IOException { this(new File(fileName), headerNum); } /** * 构造函数 * @param path 导入文件对象，读取第一个工作表 * @param headerNum 标题行号，数据行号=标题行号+1 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(File file, int headerNum) throws InvalidFormatException, IOException { this(file, headerNum, 0); } /** * 构造函数 * @param path 导入文件 * @param headerNum 标题行号，数据行号=标题行号+1 * @param sheetIndex 工作表编号 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(String fileName, int headerNum, int sheetIndex) throws InvalidFormatException, IOException { this(new File(fileName), headerNum, sheetIndex); } /** * 构造函数 * @param path 导入文件对象 * @param headerNum 标题行号，数据行号=标题行号+1 * @param sheetIndex 工作表编号 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(File file, int headerNum, int sheetIndex) throws InvalidFormatException, IOException { this(file.getName(), new FileInputStream(file), headerNum, sheetIndex); } /** * 构造函数 * @param file 导入文件对象 * @param headerNum 标题行号，数据行号=标题行号+1 * @param sheetIndex 工作表编号 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(multipartfile multipartfile, int headerNum, int sheetIndex) throws InvalidFormatException, IOException { this(multipartfile.getoriginalFilename(), multipartfile.getInputStream(), headerNum, sheetIndex); } /** * 构造函数 * @param path 导入文件对象 * @param headerNum 标题行号，数据行号=标题行号+1 * @param sheetIndex 工作表编号 * @throws InvalidFormatException * @throws IOException */ public ImportExcel(String fileName, InputStream is, int headerNum, int sheetIndex) throws InvalidFormatException, IOException { if (StringUtils.isBlank(fileName)){ throw new RuntimeException("导入文档为空!"); }else if(fileName.toLowerCase().endsWith("xls")){ this.wb = new hssfWorkbook(is); }else if(fileName.toLowerCase().endsWith("xlsx")){ this.wb = new XSSFWorkbook(is); }else{ throw new RuntimeException("文档格式不正确!"); } if (this.wb.getNumberOfSheets() List getDataList(Class cls, int... groups) throws InstantiationException, illegalaccessexception{ List annotationList = Lists.newArrayList(); // Get annotation field Field[] fs = cls.getDeclaredFields(); for (Field f : fs){ ExcelField ef = f.getAnnotation(ExcelField.class); if (ef != null && (ef.type()==0 || ef.type()==2)){ if (groups!=null && groups.length>0){ boolean inGroup = false; for (int g : groups){ if (inGroup){ break; } for (int efg : ef.groups()){ if (g == efg){ inGroup = true; annotationList.add(new Object[]{ef, f}); break; } } } }else{ annotationList.add(new Object[]{ef, f}); } } } // Get annotation method Method[] ms = cls.getDeclaredMethods(); for (Method m : ms){ ExcelField ef = m.getAnnotation(ExcelField.class); if (ef != null && (ef.type()==0 || ef.type()==2)){ if (groups!=null && groups.length>0){ boolean inGroup = false; for (int g : groups){ if (inGroup){ break; } for (int efg : ef.groups()){ if (g == efg){ inGroup = true; annotationList.add(new Object[]{ef, m}); break; } } } }else{ annotationList.add(new Object[]{ef, m}); } } } // Field sorting Collections.sort(annotationList, new Comparator() { public int compare(Object[] o1, Object[] o2) { return new Integer(((ExcelField)o1[0]).sort()).compareto( new Integer(((ExcelField)o2[0]).sort())); }; }); //log.debug("Import column count:"+annotationList.size()); // Get excel data List dataList = Lists.newArrayList(); for (int i = this.getDaTarowNum(); i valType = Class.class; if (os[1] instanceof Field){ valType = ((Field)os[1]).getType(); }else if (os[1] instanceof Method){ Method method = ((Method)os[1]); if ("get".equals(method.getName().substring(0, 3))){ valType = method.getReturnType(); }else if("set".equals(method.getName().substring(0, 3))){ valType = ((Method)os[1]).getParameterTypes()[0]; } } //log.debug("Import value type: ["+i+","+column+"] " + valType); try { if (valType == String.class){ String s = String.valueOf(val.toString()); if(StringUtils.endsWith(s, ".0")){ val = StringUtils.substringBefore(s, ".0"); }else{ val = String.valueOf(val.toString()); } }else if (valType == Integer.class){ val = Double.valueOf(val.toString()).intValue(); }else if (valType == Long.class){ val = Double.valueOf(val.toString()).longValue(); }else if (valType == Double.class){ val = Double.valueOf(val.toString()); }else if (valType == Float.class){ val = Float.valueOf(val.toString()); }else if (valType == Date.class){ val = DateUtil.getJavaDate((Double)val); }else{ if (ef.fieldType() != Class.class){ val = ef.fieldType().getmethod("getValue", String.class).invoke(null, val.toString()); }else{ val = Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(), "fieldtype."+valType.getSimpleName()+"Type")).getmethod("getValue", String.class).invoke(null, val.toString()); } } } catch (Exception ex) { log.info("Get cell value ["+i+","+column+"] error: " + ex.toString()); val = null; } // set entity value if (os[1] instanceof Field){ Reflections.invokeSetter(e, ((Field)os[1]).getName(), val); }else if (os[1] instanceof Method){ String mthodName = ((Method)os[1]).getName(); if ("get".equals(mthodName.substring(0, 3))){ mthodName = "set"+StringUtils.substringAfter(mthodName, "get"); } Reflections.invokeMethod(e, mthodName, new Class[] {valType}, new Object[] {val}); } } sb.append(val+", "); } dataList.add(e); log.debug("Read success: ["+i+"] "+sb.toString()); } return dataList; } }
导入测试
public static void main(String[] args) throws Throwable { ImportExcel ei = new ImportExcel("target/export.xlsx", 1); for (int i = ei.getDaTarowNum(); i
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。
