feat(plan): 支持学案文件下载功能

- 新增 DownLoadLessonPlanReqVO 请求类用于下载请求封装
- 在前端学案列表增加“下载”按钮，支持单条学案下载操作
- 实现前端下载接口，处理后端返回的 Blob 文件流并触发文件保存
- 后端新增下载接口，根据学案 ID 生成对应的 Word 文档并作为附件响应
- WordExportUtil 中新增按模板生成学案 Word 文档方法，支持工作日和周末模板切换
- LessonPlansService 新增根据 ID 查询学案的方法及对应 Mapper 实现
- 修改学案列表中“学案ID”标签为“计划ID”，提升表述准确性
- 下载过程中添加加载状态和错误信息提示，提升用户体验

enlish-service/src/main/java/com/yinlihupo/enlish/service/controller/LessonPlanController.java

@@ -1,16 +1,23 @@
 package com.yinlihupo.enlish.service.controller;
 
+import com.yinlihupo.enlish.service.domain.dataobject.LessonPlansDO;
 import com.yinlihupo.enlish.service.model.vo.plan.AddLessonPlanReqVO;
+import com.yinlihupo.enlish.service.model.vo.plan.DownLoadLessonPlanReqVO;
 import com.yinlihupo.enlish.service.service.LessonPlansService;
+import com.yinlihupo.enlish.service.utils.WordExportUtil;
 import com.yinlihupo.framework.biz.operationlog.aspect.ApiOperationLog;
 import com.yinlihupo.framework.common.response.Response;
+import com.yinlihupo.framework.common.util.JsonUtils;
 import jakarta.annotation.Resource;
+import jakarta.servlet.http.HttpServletResponse;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.Map;
 import java.util.concurrent.Executor;
 
 @RequestMapping("/plan/")
@@ -24,6 +31,11 @@ public class LessonPlanController {
     @Resource(name = "taskExecutor")
     private Executor taskExecutor;
 
+    @Value("${templates.plan.weekday}")
+    private String planWeekday;
+    @Value("${templates.plan.weekend}")
+    private String planWeekend;
+
     @PostMapping("generate")
     @ApiOperationLog(description = "生成学案")
     public Response<String> generateLessonPlan(@RequestBody AddLessonPlanReqVO addLessonPlanReqVO) {
@@ -38,4 +50,22 @@ public class LessonPlanController {
         }
 
     }
+
+    @PostMapping("download")
+    public void downloadLessonPlan(@RequestBody DownLoadLessonPlanReqVO downLoadLessonPlanReqVO, HttpServletResponse response) {
+        Integer id = downLoadLessonPlanReqVO.getId();
+        LessonPlansDO lessonPlanById = lessonPlanService.findLessonPlanById(id);
+
+        try {
+            Map<String, Object> map = JsonUtils.parseMap(lessonPlanById.getContentDetails(), String.class, Object.class);
+            if (!lessonPlanById.getTitle().contains("复习")) {
+                WordExportUtil.generateLessonPlanDocx(map, lessonPlanById.getTitle(), response, planWeekday, true);
+            } else {
+                WordExportUtil.generateLessonPlanDocx(map, lessonPlanById.getTitle(), response, planWeekend, false);
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+
+    }
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/domain/mapper/LessonPlansDOMapper.java

@@ -12,4 +12,6 @@ public interface LessonPlansDOMapper {
     LessonPlansDO selectById(Integer id);
 
     List<LessonPlansDO> findLessonPlansByStudentId(@Param("ids") List<Integer> ids);
+
+    LessonPlansDO selectByLessonId(@Param("lessonId") Integer lessonId);
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/model/vo/plan/DownLoadLessonPlanReqVO.java

@@ -0,0 +1,15 @@
+package com.yinlihupo.enlish.service.model.vo.plan;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Data
+@Builder
+public class DownLoadLessonPlanReqVO {
+
+    private Integer id;
+}

enlish-service/src/main/java/com/yinlihupo/enlish/service/service/LessonPlansService.java

@@ -8,4 +8,6 @@ public interface LessonPlansService {
     void generateLessonPlans(Integer studentId, Integer unitId);
 
     List<LessonPlansDO> findLessonPlans(List<Integer> ids);
+
+    LessonPlansDO findLessonPlanById(Integer id);
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/service/plan/LessonPlansServiceImpl.java

@@ -154,6 +154,11 @@ public class LessonPlansServiceImpl implements LessonPlansService {
         return lessonPlansDOMapper.findLessonPlansByStudentId(ids);
     }
 
+    @Override
+    public LessonPlansDO findLessonPlanById(Integer id) {
+        return lessonPlansDOMapper.selectByLessonId(id);
+    }
+
 
     private Map<String, Object> generateWeekendPlans(List<VocabularyBankDO> checkList,
                                                         int day,

enlish-service/src/main/java/com/yinlihupo/enlish/service/utils/WordExportUtil.java

@@ -16,6 +16,8 @@ import java.util.zip.ZipOutputStream;
 public class WordExportUtil {
 
     private static final Configure config;
+    private static final Configure configLessonPlanWeekday;
+    private static final Configure configLessonPlanWeekend;
 
     static {
         LoopRowTableRenderPolicy policy = new LoopRowTableRenderPolicy();
@@ -23,6 +25,24 @@ public class WordExportUtil {
                 .bind("words", policy)
                 .bind("answer", policy)
                 .build();
+
+        LoopRowTableRenderPolicy policyLessonPlanWeekday = new LoopRowTableRenderPolicy();
+        configLessonPlanWeekday = Configure.builder()
+                .bind("syncVocabList", policyLessonPlanWeekday)
+                .bind("gapVocabList", policyLessonPlanWeekday)
+                .bind("reviewVocabList", policyLessonPlanWeekday)
+                .bind("drillRound1", policyLessonPlanWeekday)
+                .bind("drillRound2", policyLessonPlanWeekday)
+                .bind("drillRound3", policyLessonPlanWeekday)
+                .bind("mixedDrill", policyLessonPlanWeekday)
+                .bind("checkList", policyLessonPlanWeekday)
+                .bind("checkListAns", policyLessonPlanWeekday)
+                .build();
+
+        LoopRowTableRenderPolicy policyLessonPlan = new LoopRowTableRenderPolicy();
+        configLessonPlanWeekend = Configure.builder()
+                .bind("checkList", policyLessonPlan)
+                .build();
     }
 
     /**
@@ -47,6 +67,28 @@ public class WordExportUtil {
         }
     }
 
+    public static void generateLessonPlanDocx(Map<String, Object> map, String fileName, HttpServletResponse response, String templateWordPath, boolean isWeekday) throws IOException {
+        fileName = URLEncoder.encode(fileName + ".docx", StandardCharsets.UTF_8).replaceAll("\\+", "%20");
+
+        // 3. 设置响应头
+        response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
+        response.setHeader("Content-Disposition", "attachment; filename*=UTF-8''" + fileName);
+
+        try (InputStream inputStream = new FileInputStream(templateWordPath)) {
+            XWPFTemplate template;
+            if (isWeekday) {
+                template = XWPFTemplate.compile(inputStream, configLessonPlanWeekday);
+            } else {
+                template = XWPFTemplate.compile(inputStream, configLessonPlanWeekend);
+            }
+            OutputStream out = response.getOutputStream();
+            template.render(map);
+            template.write(out);
+            template.close();
+            out.flush();
+        }
+    }
+
     /**
      * 核心补充：批量渲染并打包为 ZIP
      */
@@ -103,7 +145,7 @@ public class WordExportUtil {
      */
     private static void generateExamWordsDocx(Map<String, Object> data, HttpServletResponse response, String templateWordPath) throws IOException {
 
-        String fileName = URLEncoder.encode("摸底测试" + ".docx", StandardCharsets.UTF_8.toString()).replaceAll("\\+", "%20");
+        String fileName = URLEncoder.encode("摸底测试" + ".docx", StandardCharsets.UTF_8).replaceAll("\\+", "%20");
 
         // 3. 设置响应头
         response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");

enlish-service/src/main/resources/mapper/LessonPlansDOMapper.xml

@@ -33,4 +33,10 @@
         </if>
     </select>
 
+    <select id="selectByLessonId" resultMap="ResultMapWithBLOBs">
+        select *
+        from lesson_plans
+        where id = #{lessonId}
+    </select>
+
 </mapper>

enlish-vue/src/api/plan.js

@@ -5,4 +5,65 @@ export function generateLessonPlan(studentId, unitId) {
         studentId: studentId,
         unitId: unitId
     })
-}
+}
+
+export function downloadLessonPlan(data) {
+    return axios.post('/plan/download', data, {
+        // 1. 重要：必须指定响应类型为 blob，否则下载的文件会损坏（乱码）
+        responseType: 'blob',
+        headers: {
+            'Content-Type': 'application/json; application/octet-stream' // 根据需要调整
+        }
+    }).then(response => {
+        // 2. 提取文件名 (处理后端设置的 Content-Disposition)
+        // 后端示例: header("Content-Disposition", "attachment; filename*=UTF-8''" + fileName)
+        let fileName = 'download.zip'; // 默认兜底文件名
+
+        const contentDisposition = response.headers['content-disposition'];
+        if (contentDisposition) {
+            // 正则提取 filename*=utf-8''xxx.zip 或 filename="xxx.zip"
+            const fileNameMatch = contentDisposition.match(/filename\*?=['"]?(?:UTF-\d['"]*)?([^;\r\n"']*)['"]?;?/);
+            if (fileNameMatch && fileNameMatch[1]) {
+                // 后端如果用了 URLEncoder，这里需要 decode
+                fileName = decodeURIComponent(fileNameMatch[1]);
+            }
+        }
+
+        // 3. 开始下载流程
+        resolveBlob(response.data, fileName);
+    }).catch(error => {
+        console.error('下载失败', error);
+        showMessage('下载失败' + error, 'error');
+        // 注意：如果后端报错返回 JSON，因为 responseType 是 blob，
+        // 这里看到的 error.response.data 也是 blob，需要转回文本才能看到错误信息
+        const reader = new FileReader();
+        reader.readAsText(error.response.data);
+        reader.onload = () => {
+            console.log(JSON.parse(reader.result)); // 打印后端实际报错
+        }
+    });
+}
+
+const resolveBlob = (res, fileName) => {
+    // 创建 Blob 对象，可以指定 type，也可以让浏览器自动推断
+    const blob = new Blob([res], { type: 'application/octet-stream' });
+
+    // 兼容 IE/Edge (虽然现在很少用了)
+    if (window.navigator.msSaveOrOpenBlob) {
+        navigator.msSaveBlob(blob, fileName);
+    } else {
+        // 创建一个临时的 URL 指向 Blob
+        const link = document.createElement('a');
+        link.href = window.URL.createObjectURL(blob);
+        link.download = fileName;
+
+        // 触发点击
+        link.style.display = 'none';
+        document.body.appendChild(link);
+        link.click();
+
+        // 清理资源
+        document.body.removeChild(link);
+        window.URL.revokeObjectURL(link.href);
+    }
+};

enlish-vue/src/pages/LearningPlan.vue

@@ -19,16 +19,25 @@
                                 <div class="p-3">
                                     <div class="text-sm font-semibold mb-2">学案</div>
                                     <el-table :data="row.plans || []" size="small" border>
-                                        <el-table-column prop="id" label="学案ID" width="100" />
+                                        <el-table-column prop="id" label="计划ID" width="100" />
                                         <el-table-column prop="title" label="标题" min-width="280" />
                                         <el-table-column label="状态" width="120">
                                             <template #default="{ row: plan }">
-                                                <el-tag :type="plan.isFinished === 1 ? 'success' : 'info'"
+                                                <el-tag :type="plan.isFinished === 1 ? 'success' : 'info'" effect="plain">
-                                                    effect="plain">
                                                     {{ plan.isFinished === 1 ? '已完成' : '未完成' }}
                                                 </el-tag>
                                             </template>
                                         </el-table-column>
+                                        <el-table-column label="操作" width="120" fixed="right">
+                                            <template #default="{ row: plan }">
+                                                <el-button
+                                                    type="primary"
+                                                    size="small"
+                                                    :loading="downloadingIds.includes(plan.id)"
+                                                    @click="onDownload(plan)"
+                                                >下载</el-button>
+                                            </template>
+                                        </el-table-column>
                                     </el-table>
                                 </div>
                             </template>
@@ -54,6 +63,8 @@
 import Header from '@/layouts/components/Header.vue'
 import { ref, onMounted } from 'vue'
 import { findStudentLessonPlans } from '@/api/studentLessonPlans'
+import { downloadLessonPlan } from '@/api/plan'
+import { showMessage } from '@/composables/util'
 
 const rows = ref([])
 const loading = ref(false)
@@ -62,6 +73,7 @@ const pageSize = ref(10)
 const totalCount = ref(0)
 const searchName = ref('')
 const tableRef = ref(null)
+const downloadingIds = ref([])
 
 async function fetchLessonPlans() {
     loading.value = true
@@ -96,6 +108,22 @@ function onReset() {
     fetchLessonPlans()
 }
 
+async function onDownload(plan) {
+    if (!plan?.id) {
+        showMessage('无效的计划ID', 'error')
+        return
+    }
+    if (!downloadingIds.value.includes(plan.id)) {
+        downloadingIds.value = [...downloadingIds.value, plan.id]
+    }
+    try {
+        await downloadLessonPlan({ id: plan.id })
+        showMessage('开始下载', 'success')
+    } finally {
+        downloadingIds.value = downloadingIds.value.filter(id => id !== plan.id)
+    }
+}
+
 onMounted(() => {
     fetchLessonPlans()
 })