试题excel导出

src/main/java/com/msdw/tms/api/QuestionsControllerApi.java

@@ -87,6 +87,6 @@ public interface QuestionsControllerApi {
      * 通过excel批量导出
      */
     @ApiOperation(value = "通过excel批量导出", notes = "通过excel批量导出")
-    R exportQuestion(HttpServletResponse response) throws Exception;
+    void exportQuestion(HttpServletResponse response) throws Exception;
 
 }

src/main/java/com/msdw/tms/common/utils/DownloadUtils.java

@@ -0,0 +1,19 @@
+package com.msdw.tms.common.utils;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+public class DownloadUtils {
+    public void download(ByteArrayOutputStream byteArrayOutputStream, HttpServletResponse response, String returnName) throws IOException {
+        response.setContentType("application/octet-stream");
+        returnName = response.encodeURL(new String(returnName.getBytes(), "iso8859-1"));            //保存的文件名,必须和页面编码一致,否则乱码
+        response.addHeader("content-disposition", "attachment;filename=" + returnName);
+        response.setContentLength(byteArrayOutputStream.size());
+        ServletOutputStream outputstream = response.getOutputStream();    //取得输出流
+        byteArrayOutputStream.writeTo(outputstream);                    //写到输出流
+        byteArrayOutputStream.close();                                    //关闭
+        outputstream.flush();                                            //刷数据
+    }
+}

src/main/java/com/msdw/tms/common/utils/poi/ExcelExportUtil.java

@@ -1,10 +1,7 @@
 package com.msdw.tms.common.utils.poi;
 
 import lombok.Data;
-import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.*;
-import org.apache.poi.ss.usermodel.CellStyle;
-import org.apache.poi.ss.usermodel.Row;
-import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
 import javax.servlet.http.HttpServletResponse;
@@ -77,6 +74,52 @@ public class ExcelExportUtil<T> {
         workbook.write(response.getOutputStream());
     }
 
+    /**
+     * 基于注解导出
+     * 参数：
+     * response：
+     * objs：数据
+     * fileName：生成的文件名
+     */
+//    public void export(HttpServletResponse response, List<T> objs, String fileName) throws Exception {
+//
+//        //1.根据模板创建工作簿
+//        Workbook workbook = new XSSFWorkbook(); //2007版本
+//
+//        fileName = URLEncoder.encode(fileName, "UTF-8");
+//
+//        Sheet sheet = workbook.createSheet(fileName);
+//
+//        //3.提取公共的样式
+//        // CellStyle[] styles = getTemplateStyles(sheet.getRow(styleIndex));
+//        //4.根据数据创建每一行和每一个单元格的数据2
+//        AtomicInteger datasAi = new AtomicInteger(rowIndex); //数字
+//        for (T t : objs) {
+//            //datasAi.getAndIncrement()  ：获取数字，并++    i++
+//            Row row = sheet.createRow(datasAi.getAndIncrement());
+//            for (int i = 0; i < styles.length; i++) {
+//                Cell cell = row.createCell(i);
+//                cell.setCellStyle(styles[i]);
+//                for (Field field : fields) {
+//                    if (field.isAnnotationPresent(ExcelAttribute.class)) {
+//                        field.setAccessible(true);
+//                        ExcelAttribute ea = field.getAnnotation(ExcelAttribute.class);
+//                        if (i == ea.sort()) {
+//                            if (field.get(t) != null) {
+//                                cell.setCellValue(field.get(t).toString());
+//                            }
+//                        }
+//                    }
+//                }
+//            }
+//        }
+//
+//        response.setContentType("application/octet-stream");
+//        response.setHeader("content-disposition", "attachment;filename=" + new String(fileName.getBytes("ISO8859-1")));
+//        response.setHeader("filename", fileName);
+//        workbook.write(response.getOutputStream());
+//    }
+
     CellStyle[] getTemplateStyles(Row row) {
         CellStyle[] styles = new CellStyle[row.getLastCellNum()];
         for (int i = 0; i < row.getLastCellNum(); i++) {

src/main/java/com/msdw/tms/controller/QuestionsController.java

@@ -151,9 +151,8 @@ public class QuestionsController implements QuestionsControllerApi {
 
     @Override
     @GetMapping("/export")
-    public R exportQuestion(HttpServletResponse response) throws Exception {
+    public void exportQuestion(HttpServletResponse response) throws Exception {
         questionsService.exportQuestion(response);
-        return R.ok();
     }
 
 }

src/main/java/com/msdw/tms/service/impl/QuestionsServiceImpl.java

@@ -429,8 +429,11 @@ public class QuestionsServiceImpl extends ServiceImpl<QuestionsDao, QuestionsEnt
         //2.加载模板流数据
         org.springframework.core.io.Resource resource = new ClassPathResource("excel-template/试题导入模板.xlsx");
         FileInputStream fis = new FileInputStream(resource.getFile());
+
+        //3、通过工具类下载文件
         new ExcelExportUtil(QuestionsImportRequest.class, Constant.STARTING_ROW, Constant.STARTING_CELL).
                 export(response, fis, list, "试题表.xlsx");
+
     }
 
     private Set<QuestionsEntity> getRandomList(int len, List<QuestionsEntity> list) {

src/test/java/com/msdw/tms/TmsApplicationTests.java

@@ -3,13 +3,18 @@ package com.msdw.tms;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+
 @SpringBootTest
 class TmsApplicationTests {
 
     @Test
-    void contextLoads() {
+    void contextLoads() throws UnsupportedEncodingException {
+
+        System.out.println(URLDecoder.decode("%E8%AF%95%E9%A2%98%E8%A1%A8", "UTF-8"));
 
-        printMsg(1, 2, 3, "哈哈哈");
+        //printMsg(1, 2, 3, "哈哈哈");
 //          ------------------------------------------------------------------------------------------
 
 //        QuestionsVO questionsVO = new QuestionsVO();