springboot整合vue03-创建springboot工程

1.新建工程

用springboot启动器创建工程

 

选依赖：

web项目需要    ->springweb

orm框架选    ->jpa

数据库驱动选    ->mysql

 

2.新建数据库

-- MySQL dump 10.13  Distrib 8.0.11, for macos10.13 (x86_64)
--
-- Host: 127.0.0.1    Database: library
-- ------------------------------------------------------
-- Server version    8.0.11
 
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
SET NAMES utf8mb4 ;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
--
-- Table structure for table `book`
--
DROP TABLE IF EXISTS `book`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
SET character_set_client = utf8mb4 ;
CREATE TABLE `book` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) DEFAULT NULL,
  `author` varchar(20) DEFAULT NULL,
  `publish` varchar(20) DEFAULT NULL,
  `pages` int(10) DEFAULT NULL,
  `price` float(10,2) DEFAULT NULL,
  `bookcaseid` int(10) DEFAULT NULL,
  `abled` int(10) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `FK_ieh6qsxp6q7oydadktc9oc8t2` (`bookcaseid`),
  CONSTRAINT `FK_ieh6qsxp6q7oydadktc9oc8t2` FOREIGN KEY (`bookcaseid`) REFERENCES `bookcase` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=119 DEFAULT CHARSET=utf8;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `book`
--
LOCK TABLES `book` WRITE;
/*!40000 ALTER TABLE `book` DISABLE KEYS */;
INSERT INTO `book` VALUES (1,'解忧杂货店','东野圭吾','电子工业出版社',102,27.30,9,1),(2,'追风筝的人','卡勒德·胡赛尼','中信出版社',330,26.00,1,1),(3,'人间失格','太宰治','作家出版社',150,17.30,1,1),(4,'这就是二十四节气','高春香','电子工业出版社',220,59.00,3,1),(5,'白夜行','东野圭吾','南海出版公司',300,27.30,4,1),(6,'摆渡人','克莱儿·麦克福尔','百花洲文艺出版社',225,22.80,1,1),(7,'暖暖心绘本','米拦弗特毕','湖南少儿出版社',168,131.60,5,1),(8,'天才在左疯子在右','高铭','北京联合出版公司',330,27.50,6,1),(9,'我们仨','杨绛','生活.读书.新知三联书店',89,17.20,7,1),(10,'活着','余华','作家出版社',100,100.00,6,1),(11,'水浒传','施耐庵','三联出版社',300,50.00,1,1),(12,'三国演义','罗贯中','三联出版社',300,50.00,2,1),(13,'红楼梦','曹雪芹','三联出版社',300,50.00,5,1),(14,'西游记','吴承恩','三联出版社',300,60.00,3,1);
/*!40000 ALTER TABLE `book` ENABLE KEYS */;
UNLOCK TABLES;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
 
 
/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
-- Dump completed on 2020-02-07 15:53:18

 

3.修改配置文件

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/boot_vue?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
  jpa:
    show-sql: true
    properties:
      hibernate:
        format_sql: true
server:
  port: 8090  #8080端口已经被vue工程给占了要换一个

 

4.创建实体类

package com.example.demo.entity;
 
import javax.persistence.*;
 
@Entity
@Table(name = "book")
public class Book {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String name;
    private String author;
 
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
}

 

5.业务层

用的是jpa，简单的增删改查可以定义一个接口，继承JpaRepository接口即可，不需要实现方法

import com.example.demo.entity.Book;
import org.springframework.data.jpa.repository.JpaRepository;
 
public interface BookRepository extends JpaRepository<Book, Integer>{
}

 

6.web接口

@RestController
@RequestMapping("/book")
public class BookController {
    @Autowired
    private BookRepository books;
 
    @GetMapping("/query")
    public List<Book> query(){
        return books.findAll();
    }
}

 

启动工程，访问接口，可以看到获得了json数据；

可以在vue工程中用axios来请求web接口获取json数据，然后处理来实现前后端数据交互；

 

7.跨域问题

由于vue工程和springboot工程之间交互数据会产生跨域问题；

为了解决这一问题，可以在工程中添加一个配置类；

该配置类需要实现WebMvcConfigurer接口，重写addCorsMappings方法；

package com.example.demo.config;
 
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@Configuration
public class CrossConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }
}