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src/main/java/com/book/demo/controller/BookController.java

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+package com.book.demo.controller;
+
+import com.book.demo.entity.Book;
+import com.book.demo.mapper.BookMapper;
+import com.book.demo.services.Result;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class BookController {
+
+    @Autowired
+    BookMapper bookMapper;
+    @Autowired
+    Result res;
+
+
+    @ResponseBody
+    @GetMapping("/getallbooks")
+    public Result getAllBooks(){
+        Book []books=bookMapper.getAll();
+        if(books.length<=0){
+            res.setCode(-1);
+            res.setMsg("当前系统没有书籍信息");
+            res.data=null;
+        }
+        else{
+            res.setCode(0);
+            res.setMsg("获取成功");
+            for (Book book : books) {
+                res.data.add(book);
+            }
+        }
+        return res;
+    }
+
+    @ResponseBody
+    @GetMapping("/getbooks")
+    public Result getAllBooks(@RequestParam("kind")int kind){
+        Book []books=bookMapper.getBooksByKind(kind);
+        if(books.length<=0){
+            res.setCode(-1);
+            res.setMsg("当前系统没有此类别书籍信息");
+            res.data=null;
+        }
+        else{
+            res.setCode(0);
+            res.setMsg("获取成功");
+            for (Book book : books) {
+                res.data.add(book);
+            }
+        }
+        return res;
+    }
+
+    @ResponseBody
+    @GetMapping("/searchbooks")
+    public Result getAllBooks(@RequestParam("bookname")String bookname){
+        Book []books=bookMapper.searchBooks(bookname);
+        if(books.length<=0){
+            res.setCode(-1);
+            res.setMsg("当前系统没有相关书籍信息");
+            res.data=null;
+        }
+        else{
+            res.setCode(0);
+            res.setMsg("获取成功");
+            for (Book book : books) {
+                res.data.add(book);
+            }
+        }
+        return res;
+    }
+}