diff --git a/README.md b/README.md index 137234a..b25ea09 100644 --- a/README.md +++ b/README.md @@ -1,18 +1,12 @@ # JAVA解析Excel工具easyexcel - Java解析、生成Excel比较有名的框架有Apache poi、jxl。但他们都存在一个严重的问题就是非常的耗内存，poi有一套SAX模式的API可以一定程度的解决一些内存溢出的问题，但POI还是有一些缺陷，比如07版Excel解压缩以及解压后存储都是在内存中完成的，内存消耗依然很大。easyexcel重写了poi对07版Excel的解析，能够原本一个3M的excel用POI sax依然需要100M左右内存降低到KB级别，并且再大的excel不会出现内存溢出，03版依赖POI的sax模式。在上层做了模型转换的封装，让使用者更加简单方便 - -# 相关文档 - +## 相关文档 * [关于软件](/abouteasyexcel.md) * [快速使用](/quickstart.md) * [常见问题](/problem.md) * [更新记事](/update.md) * [English-README](/easyexcel_en.md) - - -# 二方包 - +## 二方包 ``` com.alibaba @@ -20,49 +14,32 @@ Java解析、生成Excel比较有名的框架有Apache poi、jxl。但他们都 {latestVersion} ``` - -# 最新版本 -### VERSION : 1.1.2-beat1 - -# 维护者 +## 最新版本：1.1.2-beat1 +## 维护者 姬朋飞（玉霄） - -# 快速开始 - -## 读Excel - +## 快速开始 +### 读Excel 测试代码地址：[https://github.com/alibaba/easyexcel/blob/master/src/test/java/com/alibaba/easyexcel/test/ReadTest.java](/src/test/java/com/alibaba/easyexcel/test/ReadTest.java) 读07版小于1000行数据返回List> -``` -List data = EasyExcelFactory.read(inputStream, new Sheet(1, 0)); - +```List data = EasyExcelFactory.read(inputStream, new Sheet(1, 0)); ``` 读07版小于1000行数据返回List -``` -List data = EasyExcelFactory.read(inputStream, new Sheet(2, 1,JavaModel.class)); - +```List data = EasyExcelFactory.read(inputStream, new Sheet(2, 1,JavaModel.class)); ``` 读07版大于1000行数据返回List> -``` -ExcelListener excelListener = new ExcelListener(); +```ExcelListener excelListener = new ExcelListener(); EasyExcelFactory.readBySax(inputStream, new Sheet(1, 1), excelListener); ``` 读07版大于1000行数据返回List -``` -ExcelListener excelListener = new ExcelListener(); +```ExcelListener excelListener = new ExcelListener(); EasyExcelFactory.readBySax(inputStream, new Sheet(2, 1,JavaModel.class), excelListener); ``` 读03版方法同上 - - -## 写Excel - +### 写Excel 测试代码地址：[https://github.com/alibaba/easyexcel/blob/master/src/test/java/com/alibaba/easyexcel/test/WriteTest.java](/src/test/java/com/alibaba/easyexcel/test/WriteTest.java) - 没有模板 -``` -OutputStream out = new FileOutputStream("/Users/jipengfei/2007.xlsx"); +```OutputStream out = new FileOutputStream("/Users/jipengfei/2007.xlsx"); ExcelWriter writer = EasyExcelFactory.getWriter(out); //写第一个sheet, sheet1 数据全是List 无模型映射关系 @@ -100,8 +77,7 @@ writer.finish(); out.close(); ``` 有模板 -``` -InputStream inputStream = new BufferedInputStream(new FileInputStream("/Users/jipengfei/temp.xlsx")); +```InputStream inputStream = new BufferedInputStream(new FileInputStream("/Users/jipengfei/temp.xlsx")); OutputStream out = new FileOutputStream("/Users/jipengfei/2007.xlsx"); ExcelWriter writer = EasyExcelFactory.getWriterWithTemp(inputStream,out,ExcelTypeEnum.XLSX,true); @@ -140,93 +116,30 @@ writer.finish(); out.close(); ``` -# web下载实例写法 -package com.alibaba.china.pte.web.seller.dingtalk.rpc; - -import java.io.IOException; -import java.text.SimpleDateFormat; -import java.util.ArrayList; -import java.util.Date; -import java.util.List; - -import javax.servlet.ServletOutputStream; -import javax.servlet.http.HttpServletRequest; -import javax.servlet.http.HttpServletResponse; - -import com.alibaba.excel.ExcelWriter; -import com.alibaba.excel.metadata.Sheet; -import com.alibaba.excel.support.ExcelTypeEnum; - -import org.springframework.web.bind.annotation.GetMapping; -import org.springframework.web.bind.annotation.RequestMapping; -import org.springframework.web.bind.annotation.RestController; - -/** - * @author jipengfei - * @date 2018/05/25 - */ -@RequestMapping("/api/dingtalk") -@RestController +### web下载实例写法 +``` public class Down { - @GetMapping("/a.htm") public void cooperation(HttpServletRequest request, HttpServletResponse response) { - ServletOutputStream out = null; - try { - out = response.getOutputStream(); - } catch (IOException e) { - e.printStackTrace(); - } + ServletOutputStream out = response.getOutputStream(); ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX, true); - try { - - String fileName = new String(("UserInfo " + new SimpleDateFormat("yyyy-MM-dd").format(new Date())) + String fileName = new String(("UserInfo " + new SimpleDateFormat("yyyy-MM-dd").format(new Date())) .getBytes(), "UTF-8"); - Sheet sheet1 = new Sheet(1, 0); - sheet1.setSheetName("第一个sheet"); - writer.write0(getListString(), sheet1); - response.setContentType("multipart/form-data"); - response.setCharacterEncoding("utf-8"); - response.setHeader("Content-disposition", "attachment;filename="+fileName+".xlsx"); - out.flush(); - - } catch (Exception e) { - e.printStackTrace(); - }finally { - writer.finish(); - try { - out.close(); - } catch (IOException e) { - e.printStackTrace(); - } - + Sheet sheet1 = new Sheet(1, 0); + sheet1.setSheetName("第一个sheet"); + writer.write0(getListString(), sheet1); + response.setContentType("multipart/form-data"); + response.setCharacterEncoding("utf-8"); + response.setHeader("Content-disposition", "attachment;filename="+fileName+".xlsx"); + out.flush(); } } - - private List> getListString() { - List list = new ArrayList(); - list.add("ooo1"); - list.add("ooo2"); - list.add("ooo3"); - list.add("ooo4"); - List list1 = new ArrayList(); - list1.add("ooo1"); - list1.add("ooo2"); - list1.add("ooo3"); - list1.add("ooo4"); - List> ll = new ArrayList>(); - ll.add(list); - ll.add(list1); - return ll; - } - } - -# 联系我们 - +``` +### 联系我们 有问题阿里同事可以通过钉钉找到我，阿里外同学可以通过git留言。其他技术非技术相关的也欢迎一起探讨。 - -# 招聘 +### 招聘 阿里巴巴新零售事业部--诚招JAVA资深开发、技术专家。有意向可以微信联系，简历可以发我邮箱jipengfei.jpf@alibaba-inc.com 可以走内推流程 + ![img](https://github.com/alibaba/easyexcel/blob/master/img/weixin1.png)