标签：reader pom.xml direct main ann div lin 读书 工程
??《Spring Boot In Action》 中的例子
建立一个展示阅读列表的应用。不同的用户将读过的书的数据登记进来，每次进到页面都能看到相应的读书记录。
1. 首先登录页面 start.spring.io。
页面大概长这个样子：
点击空框内的链接，会展示更全面的参数选择。【参数填好后】，选择 “Generate Project” 就可以将一个完整的Spring Boot 工程下载下来了。
工程的目录是这样的：
pom.xml 是工程构建的明细、ReadingListApplication.java 是bootstrap类 也是Sping 的首要配置类、application.properties 是Spring Boot 和应用读取特定属性的文件；在test目录下 的ReadinglistApplicationTests.java 的就是最基本的测试类。
BOOTSTRAPING SPRING
类ReadingListApplication充当了两个角色：配置Spring，启动Spring。虽然Spring Boot 负责了几乎所有的配置任务，但是总要有个入口来告诉Spring Boot 开始进行 AUTO-CONFIGURE，在ReadingListApplication.java 中有一些注解就是唤起自动配置：
@SpringBootApplication // 就是这个注解唤起自动配置 public class ReadinglistApplication { public static void main(String[] args) { SpringApplication.run(ReadinglistApplication.class, args); } }
@SpringBootApplication 触发了 Component-Scanning 和 自动配置。实际上这个注解做了其他三个注解做的事儿。
那么问题来了，怎么启动这个应用呢？最简单的办法大概就是 在IDEA中直接右键->Run main(). 当然还有CLI的、war 形式的。这些后续慢慢写。
现在开发一个简单的 ReadingListApplication了。需要定义一个Book类表示读过的书、一个Repository来存储读书记录、一个Controller相应Http请求、一个页面承接用户的操作。其他的就不需要了。那这些代码这么来写就好了。
Book.java
import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class Book { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String reader; private String isbn; private String title; private String author; private String description; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getReader() { return reader; } public void setReader(String reader) { this.reader = reader; } public String getIsbn() { return isbn; } public void setIsbn(String isbn) { this.isbn = isbn; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } }
ReadingListRepository.java
package readinglist; /** * Created on 17/1/4. */ import java.util.List; import org.springframework.data.jpa.repository.JpaRepository; public interface ReadingListRepository extends JpaRepository<Book, Long> { List<Book> findByReader(String reader); }
ReadingListController.java
package readinglist; /** * Created on 17/1/4. */ import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller @RequestMapping("/") @ConfigurationProperties(prefix = "amazon") public class ReadingListController { Logger logger = LoggerFactory.getLogger(ReadingListController.class); private ReadingListRepository readingListRepository; private String associateId; @Autowired public ReadingListController(ReadingListRepository readingListRepository) { this.readingListRepository = readingListRepository; } @RequestMapping(value = "/{reader}", method = RequestMethod.GET) public String getReadingList(@PathVariable("reader") String reader, Model model) { List<Book> bookList = readingListRepository.findByReader(reader); if (null != bookList) { model.addAttribute("books", bookList); } logger.warn("Here IS Log Output. AssociateId is {}.",associateId); return "readingList"; } @RequestMapping(value = "/{reader}", method = RequestMethod.POST) public String addToReadingList(@PathVariable("reader") String reader, Book book) { book.setReader(reader); readingListRepository.save(book); return "redirect:/{reader}"; } public void setAssociateId(String associateId) { this.associateId = associateId; } }
readlingList.html
<html xmlns:th="http://www.w3.org/1999/xhtml"> <head> <title>Reading List</title> <link rel="stylesheet" th:href="@{/style.css}" /> </head> <body> <h2>Your Reading List</h2> <div th:unless="${#lists.isEmpty(books)}"> <dl th:each="book : ${books}"> <dt class="bookHeadline"> <span th:text="${book.title}">Title</span> by <span th:text="${book.author}">Author</span> (ISBN: <span th:text="${book.isbn}">ISBN</span>) </dt> <dd class="bookDescription"> <span th:if="${book.description}" th:text="${book.description}">Description</span> <span th:if="${book.description eq null}"> No description available</span> </dd> </dl> </div> <div th:if="${#lists.isEmpty(books)}"> <p>You have no books in your book list</p> </div> <hr/> <h3>Add a book</h3> <form method="POST"> <label for="title">Title:</label> <input type="text" name="title" size="50"></input><br/> <label for="author">Author:</label> <input type="text" name="author" size="50"></input><br/> <label for="isbn">ISBN:</label> <input type="text" name="isbn" size="15"></input><br/> <label for="description">Description:</label><br/> <textarea name="description" cols="80" rows="5"> </textarea><br/> <input type="submit"></input> </form> </body> </html>
启动即可。
Spring Boot . 2 -- 用Spring Boot 创建一个Java Web 应用
标签：reader pom.xml direct main ann div lin 读书 工程
原文地址：http://www.cnblogs.com/tju-gsp/p/6273093.html
