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110 lines
4.2 KiB
110 lines
4.2 KiB
package com.alibaba.easyexcel.test.demo.web; |
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import java.io.IOException; |
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import java.net.URLEncoder; |
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import java.util.ArrayList; |
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import java.util.Date; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import javax.servlet.http.HttpServletResponse; |
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import org.springframework.beans.factory.annotation.Autowired; |
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import org.springframework.stereotype.Controller; |
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import org.springframework.web.bind.annotation.GetMapping; |
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import org.springframework.web.bind.annotation.PostMapping; |
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import org.springframework.web.bind.annotation.ResponseBody; |
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import org.springframework.web.multipart.MultipartFile; |
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import com.alibaba.excel.EasyExcel; |
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import com.alibaba.fastjson.JSON; |
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/** |
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* web读写案例 |
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* |
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* @author Jiaju Zhuang |
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**/ |
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@Controller |
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public class WebTest { |
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@Autowired |
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private UploadDAO uploadDAO; |
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/** |
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* 文件下载(失败了会返回一个有部分数据的Excel) |
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* <p> |
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* 1. 创建excel对应的实体对象 参照{@link DownloadData} |
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* <p> |
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* 2. 设置返回的 参数 |
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* <p> |
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* 3. 直接写,这里注意,finish的时候会自动关闭OutputStream,当然你外面再关闭流问题不大 |
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*/ |
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@GetMapping("download") |
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public void download(HttpServletResponse response) throws IOException { |
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// 这里注意 有同学反应使用swagger 会导致各种问题,请直接用浏览器或者用postman |
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response.setContentType("application/vnd.ms-excel"); |
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response.setCharacterEncoding("utf-8"); |
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// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系 |
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String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20"); |
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response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx"); |
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EasyExcel.write(response.getOutputStream(), DownloadData.class).sheet("模板").doWrite(data()); |
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} |
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/** |
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* 文件下载并且失败的时候返回json(默认失败了会返回一个有部分数据的Excel) |
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* |
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* @since 2.1.1 |
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*/ |
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@GetMapping("downloadFailedUsingJson") |
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public void downloadFailedUsingJson(HttpServletResponse response) throws IOException { |
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// 这里注意 有同学反应使用swagger 会导致各种问题,请直接用浏览器或者用postman |
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try { |
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response.setContentType("application/vnd.ms-excel"); |
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response.setCharacterEncoding("utf-8"); |
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// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系 |
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String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20"); |
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response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx"); |
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// 这里需要设置不关闭流 |
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EasyExcel.write(response.getOutputStream(), DownloadData.class).autoCloseStream(Boolean.FALSE).sheet("模板") |
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.doWrite(data()); |
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} catch (Exception e) { |
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// 重置response |
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response.reset(); |
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response.setContentType("application/json"); |
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response.setCharacterEncoding("utf-8"); |
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Map<String, String> map = new HashMap<String, String>(); |
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map.put("status", "failure"); |
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map.put("message", "下载文件失败" + e.getMessage()); |
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response.getWriter().println(JSON.toJSONString(map)); |
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} |
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} |
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/** |
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* 文件上传 |
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* <p> |
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* 1. 创建excel对应的实体对象 参照{@link UploadData} |
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* <p> |
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* 2. 由于默认一行行的读取excel,所以需要创建excel一行一行的回调监听器,参照{@link UploadDataListener} |
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* <p> |
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* 3. 直接读即可 |
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*/ |
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@PostMapping("upload") |
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@ResponseBody |
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public String upload(MultipartFile file) throws IOException { |
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EasyExcel.read(file.getInputStream(), UploadData.class, new UploadDataListener(uploadDAO)).sheet().doRead(); |
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return "success"; |
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} |
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private List<DownloadData> data() { |
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List<DownloadData> list = new ArrayList<DownloadData>(); |
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for (int i = 0; i < 10; i++) { |
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DownloadData data = new DownloadData(); |
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data.setString("字符串" + 0); |
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data.setDate(new Date()); |
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data.setDoubleData(0.56); |
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list.add(data); |
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} |
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return list; |
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} |
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}
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