feat: 实现整书导出

client/src/pages/book/Bookshelf.tsx

@@ -159,6 +159,14 @@ function Bookshelf() {
                       actionType: 'dialog',
                       dialog: detailDialog(),
                     },
+                    {
+                      type: 'action',
+                      label: '导出',
+                      level: 'link',
+                      size: 'sm',
+                      actionType: 'download',
+                      api: `${commonInfo.baseUrl}/book/export/\${id}`,
+                    },
                     {
                       className: 'text-danger btn-deleted',
                       type: 'action',

src/main/java/com/lanyuanxiaoyao/bookstore/controller/BookController.java

@@ -1,15 +1,25 @@
 package com.lanyuanxiaoyao.bookstore.controller;
 
+import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.core.util.URLUtil;
 import com.lanyuanxiaoyao.bookstore.entity.Book;
+import com.lanyuanxiaoyao.bookstore.entity.Chapter;
+import com.lanyuanxiaoyao.bookstore.entity.Line;
 import com.lanyuanxiaoyao.bookstore.entity.vo.Option;
 import com.lanyuanxiaoyao.bookstore.service.BookService;
 import com.lanyuanxiaoyao.service.template.controller.SimpleControllerSupport;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
 import java.time.LocalDateTime;
+import java.util.Comparator;
 import java.util.List;
 import java.util.Set;
 import java.util.function.Function;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -29,6 +39,39 @@ public class BookController extends SimpleControllerSupport<Book, BookController
     return bookService.tags();
   }
 
+  @GetMapping("export/{book_id}")
+  public void export(@PathVariable("book_id") Long bookId, HttpServletResponse response) throws IOException {
+    var book = bookService.detailOrThrow(bookId);
+    var result = new StringBuilder();
+    result.append(StrUtil.format("""
+        书名：{}
+        作者：{}
+        简介：{}
+        来源：{}
+        
+        """, book.getName(), book.getAuthor(), book.getDescription(), book.getSource()));
+    book.getChapters()
+        .stream()
+        .sorted(Comparator.comparing(Chapter::getSequence))
+        .forEach(chapter -> {
+          result.append(StrUtil.format("第{}章 {}", chapter.getSequence(), chapter.getName()));
+          result.append("\n\n");
+          chapter.getContent()
+              .stream()
+              .sorted(Comparator.comparing(Line::getSequence))
+              .forEach(line -> {
+                result.append(line.getText());
+                result.append("\n");
+              });
+          result.append("\n\n");
+        });
+    response.setHeader("Access-Control-Expose-Headers", "Content-Type");
+    response.setHeader("Content-Type", "text/plain");
+    response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
+    response.setHeader("Content-Disposition", StrUtil.format("attachment; filename={}", URLUtil.encodeAll(StrUtil.format("{}.txt", book.getName()))));
+    IoUtil.copy(new ByteArrayInputStream(result.toString().getBytes()), response.getOutputStream());
+  }
+
   @Override
   protected Function<SaveItem, Book> saveItemMapper() {
     return item -> {