需要源代碼的可以加我微信好友gqljxg1514

1，首先配置依賴pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.nn-kc</groupId><artifactId>nnkc-reportexcel</artifactId><packaging>war</packaging><version>1.0-SNAPSHOT</version><name>nnkc-reportexcel Maven Webapp</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.8.2</version></dependency><dependency><groupId>org.mortbay.jetty</groupId><artifactId>servlet-api-2.5</artifactId><version>6.1.9</version><scope>provided</scope></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.9</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.9</version></dependency><dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.3</version></dependency></dependencies><build><finalName>nnkc-reportexcel</finalName></build> </project> View Code

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2,創建實體類Product.java?

package com.nnkc.pojo;import com.nnkc.util.ExcelAnnotation;import java.util.Date;public class Product {@ExcelAnnotation(id=1,name={"產品名稱","商品名稱"},width = 5000)private String name;@ExcelAnnotation(id=2,name={"產品價格","商品價格"},width = 5000)private double price;@ExcelAnnotation(id=3,name={"生產日期"},width = 5000)private Date date;public String getName() {return name;}public void setName(String name) {this.name = name;}public double getPrice() {return price;}public void setPrice(double price) {this.price = price;}public Date getDate() {return date;}public void setDate(Date date) {this.date = date;} } View Code

3，編寫工具類/nnkc-reportexcel/src/main/java/com/nnkc/util/ExcelAnnotation.java

package com.nnkc.util;import java.lang.annotation.*;/*** <p>* 功能：excel模板設置* </p>*/ @Documented @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.FIELD) public @interface ExcelAnnotation {//Excel列ID(Excel列排序序號)int id();//Excel列名 String[] name();//Excel列寬int width() default 5000; } View Code

以及/nnkc-reportexcel/src/main/java/com/nnkc/util/ExcelUtil.java

package com.nnkc.util;import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.hssf.util.Region; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFRichTextString;import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.text.SimpleDateFormat; import java.util.*;public class ExcelUtil<T> {public static final int EXPORT_07_LEAST_SIZE = 50000;public static final int EXPORT_07S_LEAST_SIZE = 100000;/*** 功能 :獲取表單導出數據* @param list 數據列表* @param title 首行標題* @param className 實體對象class* @param exportType 模板標號* @return* @throws Exception*/public HSSFWorkbook exportExcel(List<T> list, String title, Class className,Integer exportType) throws Exception {// 獲取屬性Field[] fields = className.getDeclaredFields();List<Field> fieldList = new ArrayList<Field>();for (Field fie : fields) {if (fie.isAnnotationPresent(ExcelAnnotation.class)) {fieldList.add(fie);}}// 按照id進行排序Collections.sort(fieldList, new Comparator<Field>() {public int compare(Field f1, Field f2) {return f1.getAnnotation(ExcelAnnotation.class).id() - f2.getAnnotation(ExcelAnnotation.class).id();}});int columnsize = fieldList.size(), rowindex = 0;// 創建一個HSSFWorbook對象（excel的文檔對象）HSSFWorkbook hWorkbook = new HSSFWorkbook();// 創建一個HSSFSheet對象（excll的表單）HSSFSheet hSheet = hWorkbook.createSheet();// 創建行（excel的行）HSSFRow hRow = hSheet.createRow(rowindex++);//設置行高度hRow.setHeight((short)380);// 創建單元格（從0開始）HSSFCell hCell = hRow.createCell((short) 0);//樣式對象HSSFCellStyle cellStyle = getCellStyle(hWorkbook, (short) 300, (short) 500);// 將上面獲得的樣式對象給對應單元格 hCell.setCellStyle(cellStyle);//設置標題行 hCell.setCellValue(title);if (getHuoResult(fieldList.isEmpty(),list == null,list.isEmpty())) {return hWorkbook;}//創建第二行，代表列名hRow = hSheet.createRow(rowindex++);cellStyle = getCellStyle(hWorkbook, (short) 270, (short) 500);generateTitle(exportType, fieldList, columnsize, hSheet, hRow, cellStyle);//組裝excel的數據cellStyle = getCellStyle(hWorkbook, (short) 220, (short) 500);// 設置單元格格式 generateData(list, fieldList, columnsize, rowindex, hSheet, cellStyle);/*** 第1個參數：從哪一行開始* 第2個參數：到哪一行結束* 第3個參數：從哪一列開始* 第4個參數：到哪一列結束*/hSheet.addMergedRegion(new CellRangeAddress(0,0,0,columnsize-1));// 固定表頭（前一個參數代表列，后一個參數單表行）hSheet.createFreezePane(0, 1);return hWorkbook;}/*** 功能：組裝列明* @param exportType 模板編號* @param fieldList 列名* @param columnsize 列數* @param hSheet sheet頁* @param hRow 行* @param cellStyle 樣式*/private void generateTitle(Integer exportType, List<Field> fieldList, int columnsize, HSSFSheet hSheet, HSSFRow hRow,HSSFCellStyle cellStyle) {HSSFCell hCell;for (int i = 0; i < columnsize; i++) {Field field = fieldList.get(i);if (field.isAnnotationPresent(ExcelAnnotation.class)) {// 獲取該字段的注解對象ExcelAnnotation anno = field.getAnnotation(ExcelAnnotation.class);hCell = hRow.createCell((short) i);String colName = field.getAnnotation(ExcelAnnotation.class).name().length>exportType?field.getAnnotation(ExcelAnnotation.class).name()[exportType]:field.getAnnotation(ExcelAnnotation.class).name()[0];hCell.setCellValue(colName);hCell.setCellStyle(cellStyle);hSheet.setColumnWidth((short) i, (short) anno.width());}}}/*** 組裝excel的數據* @param list 具體數據* @param fieldList 列名* @param columnsize 列數* @param rowindex 行數計數* @param hSheet sheet頁* @param cellStyle 樣式* @return* @throws NoSuchMethodException* @throws IllegalAccessException* @throws InvocationTargetException*/private int generateData(List<T> list, List<Field> fieldList, int columnsize, int rowindex, HSSFSheet hSheet,HSSFCellStyle cellStyle) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {HSSFRow hRow;HSSFCell hCell;for (Object model : list) {hRow = hSheet.createRow(rowindex++);//獲取該類Class clazz = model.getClass();for (int i = 0; i < columnsize; i++) {Field field =fieldList.get(i);//獲取方法名String methodName = "get" + field.getName().substring(0, 1).toUpperCase()+field.getName().substring(1);Method method = clazz.getMethod(methodName);try {// 獲取該字段的注解對象Object result = method.invoke(model);hCell = hRow.createCell((short) i);if (result != null) {if (result.getClass().isAssignableFrom(Date.class)) {SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");result = format.format(result);}hCell.setCellValue(new HSSFRichTextString(result.toString()));} else {hCell.setCellValue(new HSSFRichTextString("-"));}hCell.setCellStyle(cellStyle);} catch (IllegalArgumentException e) {System.out.println(e.getMessage());}}}return rowindex;}/*** 生成07格式的excel對象 使用流方式防止內存溢出* @param list* @param title* @param className* @param exportType* @return* @throws Exception*/public SXSSFWorkbook exportExcel07S(List<T> list, String title, Class className,Integer exportType) throws Exception {// 獲取屬性Field[] fields = className.getDeclaredFields();List<Field> fieldList = new ArrayList<Field>();for (Field fie : fields) {if (fie.isAnnotationPresent(ExcelAnnotation.class)){fieldList.add(fie);}}// 按照id進行排序Collections.sort(fieldList, new Comparator<Field>() {public int compare(Field f1, Field f2) {return f1.getAnnotation(ExcelAnnotation.class).id() - f2.getAnnotation(ExcelAnnotation.class).id();}});int columnsize = fieldList.size(), rowindex = 0;// 創建一個HSSFWorbook對象sSXSSFWorkbook hWorkbook = new SXSSFWorkbook();// 創建一個HSSFSheet對象（sheet頁）Sheet hSheet = hWorkbook.createSheet();// 創建第一行(此行作為頭)Row hRow = hSheet.createRow(rowindex++);hRow.setHeight((short)380);// 創建單元格（第一（0）個）Cell hCell = hRow.createCell((short) 0);// 設置樣式CellStyle cellStyle = getCellStyle07S(hWorkbook, (short) 300, (short) 500);// 將上面獲得的樣式對象給對應單元格 hCell.setCellStyle(cellStyle);//設置標題行 hCell.setCellValue(title);if (getHuoResult(fieldList.isEmpty(),list == null,list.isEmpty())) {return hWorkbook;}// 創建第二列，列名hRow = hSheet.createRow(rowindex++);cellStyle = getCellStyle07S(hWorkbook, (short) 270, (short) 500);createTitle07S(exportType, fieldList, columnsize, hSheet, hRow, cellStyle);//生成數據cellStyle = getCellStyle07S(hWorkbook, (short) 220, (short) 500);// 設置單元格格式 dealCreateRow07S(list, fieldList, columnsize, rowindex, hSheet, cellStyle);/*** 第1個參數：從哪一行開始* 第2個參數：到哪一行結束* 第3個參數：從哪一列開始* 第4個參數：到哪一列結束*/hSheet.addMergedRegion(new CellRangeAddress(0,0,0,columnsize-1));// 固定表頭（前一個參數代表列，后一個參數單表行）hSheet.createFreezePane(0, 1);return hWorkbook;}private int dealCreateRow07S(List<T> list, List<Field> fieldList, int columnsize, int rowindex, Sheet hSheet,CellStyle cellStyle) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {Row hRow;Cell hCell;for (Object model : list) {hRow = hSheet.createRow(rowindex++);// 獲取該類 并獲取自身方法Class clazz = model.getClass();for (int i = 0; i < columnsize; i++) {Field field = fieldList.get(i);String methodName = "get" + field.getName().substring(0, 1).toUpperCase()+ field.getName().substring(1);Method method = clazz.getMethod(methodName);try {// 獲取該字段的注解對象Object result = method.invoke(model);hCell = hRow.createCell((short) i);if (result != null) {if (result.getClass().isAssignableFrom(Date.class)) {SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");result = format.format(result);}hCell.setCellValue(new XSSFRichTextString(result.toString()));} else {hCell.setCellValue(new XSSFRichTextString("-"));}hCell.setCellStyle(cellStyle);} catch (IllegalArgumentException e) {System.out.println(e.getMessage());}}}return rowindex;}/*** 生成列名* @param exportType 模板編號* @param fieldList 列名* @param columnsize 列數* @param hSheet* @param hRow* @param cellStyle*/private void createTitle07S(Integer exportType, List<Field> fieldList, int columnsize, Sheet hSheet, Row hRow,CellStyle cellStyle) {Cell hCell;for (int i = 0; i < columnsize; i++) {Field field = (Field) fieldList.get(i);if (field.isAnnotationPresent(ExcelAnnotation.class)) {// 獲取該字段的注解對象ExcelAnnotation anno = field.getAnnotation(ExcelAnnotation.class);hCell = hRow.createCell((short) i);String colName = field.getAnnotation(ExcelAnnotation.class).name().length>exportType?field.getAnnotation(ExcelAnnotation.class).name()[exportType]:field.getAnnotation(ExcelAnnotation.class).name()[0];hCell.setCellValue(colName);hCell.setCellStyle(cellStyle);hSheet.setColumnWidth((short) i, (short) anno.width());}}}/*** 功能 :設置excel表格默認樣式* @param hWorkbook 需導出Excel數據* @param fontHeight 字體粗度* @param boldWeight 表格線的粗度* @return*/public HSSFCellStyle getCellStyle(HSSFWorkbook hWorkbook, short fontHeight, short boldWeight) {HSSFCellStyle cellStyle;HSSFFont font;cellStyle = hWorkbook.createCellStyle();cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);cellStyle.setTopBorderColor(HSSFColor.BLACK.index);cellStyle.setLeftBorderColor(HSSFColor.BLACK.index);cellStyle.setRightBorderColor(HSSFColor.BLACK.index);cellStyle.setBottomBorderColor(HSSFColor.BLACK.index);font = hWorkbook.createFont();font.setFontHeight(fontHeight);font.setBoldweight(boldWeight);font.setFontName("宋體");cellStyle.setFont(font);cellStyle.setWrapText(true);cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);return cellStyle;}/*** 功能 :設置excel 07表格默認樣式* @param hWorkbook 需導出Excel數據* @param fontHeight 字體粗度* @param boldWeight 表格線的粗度* @return*/public CellStyle getCellStyle07S(SXSSFWorkbook hWorkbook, short fontHeight, short boldWeight) {CellStyle cellStyle;Font font;cellStyle = hWorkbook.createCellStyle();cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);cellStyle.setTopBorderColor(HSSFColor.BLACK.index);cellStyle.setLeftBorderColor(HSSFColor.BLACK.index);cellStyle.setRightBorderColor(HSSFColor.BLACK.index);cellStyle.setBottomBorderColor(HSSFColor.BLACK.index);font = hWorkbook.createFont();font.setFontHeight(fontHeight);font.setBoldweight(boldWeight);font.setFontName("宋體");cellStyle.setFont(font);cellStyle.setWrapText(true);cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);return cellStyle;}/** 獲取或運算結果*/private static boolean getHuoResult(Boolean... bs){for(boolean b:bs){if(b){return b;}}return false;}} View Code

4，配置web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app id="starter" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"><servlet><servlet-name>ReportExcel</servlet-name><servlet-class>com.nnkc.ReportExcelTest</servlet-class></servlet><servlet-mapping><servlet-name>ReportExcel</servlet-name><url-pattern>/reportExcel</url-pattern></servlet-mapping> </web-app> View Code

5，創建ReportExcel.java用來導出Excel

package com.nnkc;import com.nnkc.util.ExcelUtil; import org.apache.commons.lang.StringUtils; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.xssf.streaming.SXSSFWorkbook;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.List;/***功能描述：導出報表*/ public class ReportExcel {/*** 功能: Excel導出公共方法* 記錄條數大于50000時 導出.xlsx文件(excel07+) 小于等于50000時導出 .xls文件(excel97-03)* @param list 需要導出的列表數據* @param title 導出文件的標題* @param className 導出對象的類名* @param exportType 針對同一個pojo可能有多個不同的導出模板時,可以通過此屬性來決定導出哪一套模板，默認第一套* @param response 用來獲取輸出流* @param request 針對火狐瀏覽器導出時文件名亂碼的問題,也可以不傳入此值* @throws IOException*/public void excelExport(List list, String title, Class className, Integer exportType, HttpServletResponse response, HttpServletRequest request) throws IOException {OutputStream out = response.getOutputStream();try {ExcelUtil excel = new ExcelUtil();if(list!=null && list.size()>ExcelUtil.EXPORT_07_LEAST_SIZE){dealBigNumber(list, title, className, exportType, response, request, out, excel);}else{HSSFWorkbook hss = new HSSFWorkbook();if(exportType==null){hss = excel.exportExcel(list,title,className,0);}else{hss = excel.exportExcel(list, title, className, exportType);}String disposition = "attachment;filename=";if(request!=null&&request.getHeader("USER-AGENT")!=null&& StringUtils.contains(request.getHeader("USER-AGENT"), "Firefox")){disposition += new String((title+".xls").getBytes(),"ISO8859-1");}else{disposition += URLEncoder.encode(title+".xls", "UTF-8");}response.setContentType("application/vnd.ms-excel;charset=UTF-8");response.setHeader("Content-disposition", disposition);hss.write(out);}} catch (Exception e) {System.out.println(e.getMessage());} finally {out.close();}}private void dealBigNumber(List list, String title, Class className, Integer exportType,HttpServletResponse response, HttpServletRequest request, OutputStream out, ExcelUtil excel)throws Exception{SXSSFWorkbook hss;if(exportType==null){hss = excel.exportExcel07S(list,title,className,0);}else{hss = excel.exportExcel07S(list, title, className, exportType);}String disposition = "attachment;filename=";if(request!=null && request.getHeader("USER-AGENT") != null && StringUtils.contains(request.getHeader("USER-AGENT"), "Firefox")){disposition += new String((title+".xlsx").getBytes(),"ISO8859-1");}else{disposition += URLEncoder.encode(title+".xlsx", "UTF-8");}response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");response.setHeader("Content-disposition", disposition);hss.write(out);} } View Code

6最后創建/nnkc-reportexcel/src/main/java/com/nnkc/ReportExcelTest.java用來測試結果

package com.nnkc;import com.nnkc.pojo.Product;import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.ArrayList; import java.util.Date; import java.util.List;public class ReportExcelTest extends HttpServlet {@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println("調用成功");}@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {List<Product> list = new ArrayList<Product>();for (int i = 0 ; i<60000 ; i++) {//組裝測試數據Product product = new Product();product.setName("愛奇藝會員"+i);product.setPrice(9.99);product.setDate(new Date());list.add(product);}ReportExcel reportExcel = new ReportExcel();reportExcel.excelExport(list,"測試",Product.class,1,resp,req);} } View Code

運行結果：

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轉載于:https://www.cnblogs.com/gaoqiaoliangjie/p/9284778.html

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