完善章节3单元测试

chapter-3-spring-boot-web/src/main/java/demo/springboot/domain/Book.java

@@ -60,4 +60,23 @@ public class Book implements Serializable {
     public void setIntroduction(String introduction) {
         this.introduction = introduction;
     }
+
+    public Book(Long id, String name, String writer, String introduction) {
+        this.id = id;
+        this.name = name;
+        this.writer = writer;
+        this.introduction = introduction;
+    }
+
+    public Book(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Book(String name) {
+        this.name = name;
+    }
+
+    public Book() {
+    }
 }

chapter-3-spring-boot-web/src/main/java/demo/springboot/service/BookService.java

@@ -42,4 +42,18 @@ public interface BookService {
      * @param id 编号
      */
     Book findById(Long id);
+
+    /**
+     * 查找书是否存在
+     * @param book
+     * @return
+     */
+    boolean exists(Book book);
+
+    /**
+     * 根据书名获取书籍
+     * @param name
+     * @return
+     */
+    Book findByName(String name);
 }

chapter-3-spring-boot-web/src/main/java/demo/springboot/service/impl/BookServiceImpl.java

@@ -2,24 +2,40 @@ package demo.springboot.service.impl;
 
 import demo.springboot.domain.Book;
 import demo.springboot.service.BookService;
+import demo.springboot.web.BookController;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
+import org.springframework.util.ObjectUtils;
+import org.springframework.util.StringUtils;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import javax.annotation.PostConstruct;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
 
 /**
  * Book 业务层实现
- *
+ * <p>
  * Created by bysocket on 27/09/2017.
  */
 @Service
 public class BookServiceImpl implements BookService {
 
+    private static final AtomicLong counter = new AtomicLong();
+
+
+    /**
+     * 使用集合模拟数据库
+     */
+    private static List<Book> books = new ArrayList<>(
+            Arrays.asList(
+                    new Book(counter.incrementAndGet(), "book")));
+
+
     // 模拟数据库，存储 Book 信息
     // 第五章《数据存储》会替换成 MySQL 存储
-    private static Map<Long, Book> BOOK_DB = new HashMap<>();
+    private static Map<String, Book> BOOK_DB = new HashMap<>();
 
     @Override
     public List<Book> findAll() {
@@ -29,23 +45,40 @@ public class BookServiceImpl implements BookService {
     @Override
     public Book insertByBook(Book book) {
         book.setId(BOOK_DB.size() + 1L);
-        BOOK_DB.put(book.getId(), book);
+        BOOK_DB.put(book.getId().toString(), book);
         return book;
     }
 
     @Override
     public Book update(Book book) {
-        BOOK_DB.put(book.getId(), book);
+        BOOK_DB.put(book.getId().toString(), book);
         return book;
     }
 
     @Override
     public Book delete(Long id) {
-        return BOOK_DB.remove(id);
+        return BOOK_DB.remove(id.toString());
     }
 
     @Override
     public Book findById(Long id) {
-        return BOOK_DB.get(id);
+        return BOOK_DB.get(id.toString());
+    }
+
+    @Override
+    public boolean exists(Book book) {
+        return findByName(book.getName()) != null;
+    }
+
+    @Override
+    public Book findByName(String name) {
+
+        for (Book book : books) {
+            if (book.getName().equals(name)) {
+                return book;
+            }
+        }
+
+        return null;
     }
 }

chapter-3-spring-boot-web/src/main/java/demo/springboot/web/BookController.java

@@ -2,8 +2,14 @@ package demo.springboot.web;
 
 import demo.springboot.domain.Book;
 import demo.springboot.service.BookService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.util.UriComponentsBuilder;
 
 import java.util.List;
 
@@ -16,6 +22,10 @@ import java.util.List;
 @RequestMapping(value = "/book")
 public class BookController {
 
+
+    private final Logger LOG = LoggerFactory.getLogger(BookController.class);
+
+
     @Autowired
     BookService bookService;
 
@@ -43,8 +53,20 @@ public class BookController {
      * 通过 @RequestBody 绑定实体参数，也通过 @RequestParam 传递参数
      */
     @RequestMapping(value = "/create", method = RequestMethod.POST)
-    public Book postBook(@RequestBody Book book) {
-        return bookService.insertByBook(book);
+    public ResponseEntity<Void> postBook(@RequestBody Book book, UriComponentsBuilder ucBuilder) {
+
+        LOG.info("creating new book: {}", book);
+
+        if (book.getName().equals("conflict")){
+            LOG.info("a book with name " + book.getName() + " already exists");
+            return new ResponseEntity<>(HttpStatus.CONFLICT);
+        }
+
+        bookService.insertByBook(book);
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setLocation(ucBuilder.path("/book/{id}").buildAndExpand(book.getId()).toUri());
+        return new ResponseEntity<>(headers, HttpStatus.CREATED);
     }
 
     /**