目錄一 、EasyExcel簡介二、常用注解三、依賴四、監(jiān)聽五、接口導(dǎo)入Excel六、接口 導(dǎo)出Excel (HttpServletResponse response, HttpServletRequest request)七、本地導(dǎo)入、本地導(dǎo)出一 、EasyExcel簡介

EasyExcel優(yōu)勢

   注解式自定義操作。    輸入輸出簡單，提供輸入輸出過程的接口    支持一定程度的單元格合并等靈活化操作 二、常用注解 @ExcelProperty 指定當(dāng)前字段對應(yīng)excel中的那一列。可以根據(jù)名字或者Index去匹配。當(dāng)然也可以不寫，默認(rèn)第一個(gè)字段就是index=0，以此類推。千萬注意，要么全部不寫，要么全部用index，要么全部用名字去匹配。千萬別三個(gè)混著用，除非你非常了解源代碼中三個(gè)混著用怎么去排序的。 @ExcelIgnore 默認(rèn)所有字段都會(huì)和excel去匹配，加了這個(gè)注解會(huì)忽略該字段 @DateTimeFormat 日期轉(zhuǎn)換，用String去接收excel日期格式的數(shù)據(jù)會(huì)調(diào)用這個(gè)注解。里面的value參照java.text.SimpleDateFormat @NumberFormat 數(shù)字轉(zhuǎn)換，用String去接收excel數(shù)字格式的數(shù)據(jù)會(huì)調(diào)用這個(gè)注解。里面的value參照java.text.DecimalFormat @ExcelIgnoreUnannotated默認(rèn)不加ExcelProperty 的注解的都會(huì)參與讀寫,加了不會(huì)參與 三、依賴

<!-- easyexcel 主要依賴 這一個(gè)基本上就夠了--><dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>2.1.4</version></dependency> <!-- servlet-api --><dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope></dependency><dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version></dependency>四、監(jiān)聽

/** * EasyExcel 導(dǎo)入監(jiān)聽 */public class ExcelListener extends AnalysisEventListener { //可以通過實(shí)例獲取該值 private List<Object> datas = new ArrayList<Object>(); @Override public void invoke(Object o, AnalysisContext analysisContext) {datas.add(o);//數(shù)據(jù)存儲(chǔ)到list，供批量處理，或后續(xù)自己業(yè)務(wù)邏輯處理。doSomething(o);//根據(jù)自己業(yè)務(wù)做處理 } private void doSomething(Object object) {//1、入庫調(diào)用接口 } public List<Object> getDatas() {return datas; } public void setDatas(List<Object> datas) {this.datas = datas; } @Override public void doAfterAllAnalysed(AnalysisContext analysisContext) {// datas.clear();//解析結(jié)束銷毀不用的資源 }}五、接口導(dǎo)入Excel

try { //獲取文件名 String filename = file.getOriginalFilename(); //獲取文件流 InputStream inputStream = file.getInputStream(); //實(shí)例化實(shí)現(xiàn)了AnalysisEventListener接口的類 ExcelListener listener = new ExcelListener(); //傳入?yún)?shù) ExcelReader excelReader = new ExcelReader(inputStream, ExcelTypeEnum.XLS, null, listener); //讀取信息 excelReader.read(new Sheet(1, 0, Test.class)); //獲取數(shù)據(jù) List<Object> list = listener.getDatas(); if (list.size() > 1) {for (int i = 0; i < list.size(); i++) { Testobj = (Test) list.get(i); JSONObject jo = new JSONObject();} }} catch (Exception e) { System.out.println(e.getMessage());}六、接口 導(dǎo)出Excel (HttpServletResponse response, HttpServletRequest request)

try { String filenames = '111111'; String userAgent = request.getHeader('User-Agent'); if (userAgent.contains('MSIE') || userAgent.contains('Trident')) {filenames = URLEncoder.encode(filenames, 'UTF-8'); } else {filenames = new String(filenames.getBytes('UTF-8'), 'ISO-8859-1'); } response.setContentType('application/vnd.ms-exce'); response.setCharacterEncoding('utf-8'); response.addHeader('Content-Disposition', 'filename=' + filenames + '.xlsx'); EasyExcel.write(response.getOutputStream(), Test.class).sheet('sheet').doWrite(testList);} catch (Exception e) {}七、本地導(dǎo)入、本地導(dǎo)出

List<Test> testList = new ArrayList<>();try { String strUrl = 'C:UsersAdministratorDesktopjson.xlsx'; File multipartFile = new File(strUrl); InputStream inputStream = new FileInputStream(multipartFile); //實(shí)例化實(shí)現(xiàn)了AnalysisEventListener接口的類 ExcelListener listener = new ExcelListener(); //傳入?yún)?shù) ExcelReader excelReader = new ExcelReader(inputStream, ExcelTypeEnum.XLS, null, listener); //讀取信息 excelReader.read(new Sheet(1, 0, Test.class)); //獲取數(shù)據(jù) List<Object> list = listener.getDatas(); if (list.size() > 1) {for (int i = 0; i < list.size(); i++) { Testobj = (Test) list.get(i);} }} catch (Exception e) { System.out.println(e.getMessage());}try { String strUrl = 'C:UsersAdministratorDesktopjson'+System.currentTimeMillis()+'.xlsx'; EasyExcel.write(strUrl,Test.class).sheet('sheet').doWrite(testList);} catch (Exception e) {}

  以上就是EasyExcel的基礎(chǔ)使用過程，歡迎點(diǎn)贊關(guān)注交流。

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