Spring boot -环境搭建 ,初步接触（1）

时间 2019-12-07

原文原文链接

1. Eclipse 建立 maven project

项目目录以下：html

2. pom.xml 配置文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>guo</groupId>
	<artifactId>xw</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>
	<name>xw</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<version>1.3.3.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
</project>

application.yml （放置在resources 下面）

8080端口被占用，在yml文件中修改端口为 8092 。不能有tab键值，缩进用空格键

server:
      port: 8092

3.SpringConfig.java （放置在包最外层）

@Configuration //经过该注解来代表该类是一个Spring的配置，至关于一个xml文件
@ComponentScan(basePackages = "guo.xw") 
public class SpringConfig {
    
    @Bean         // 经过该注解来代表是一个Bean对象，至关于xml中的<bean>
    public UserDao getUserDAO(){
        return new UserDao();    // 直接new对象作演示
    }
    
}

4. 主入口App.java （放置在包最外层）

@SpringBootApplication
public class App 
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
        SpringApplication.run(App.class, args);
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SpringConfig.class);
        UserService userService = context.getBean(UserService.class);
        List<User> list = userService.queryUserList();
        for (User user : list) {
            System.out.println(user.getName()+ ", " + user.getAge());
        }
        
        context.destroy();
        
    }
}

5. Controller

@RestController
public class UserController {

	@RequestMapping(path="/user" ,method=RequestMethod.GET)
	public String testUser(){
		
		return "{ 'name': guoxw,  'age': 10 }";
	}
	
	
	@RequestMapping(path="/userUpdate" ,  method=RequestMethod.POST)
	public User  userPost(@RequestBody User user ) {
	
		int age=user.getAge()*2;
		String name=user.getName()+"_update";
	
		User user2=new User();
		user2.setAge(age);
		user2.setName(name);
		
		return user2;
		
	}
	
}

6. get 方法

get带参数的：

	@RequestMapping(path="/", method=RequestMethod.GET)
	public String Test(@RequestParam(name="name", required=true) String name) {
		logger.debug("Parameter is: {}", name);
		return "Test123" + name;
	}

// http://localhost:8092/test/user/guoxw_parameter


@RequestMapping(path="/user/{name}", method=RequestMethod.GET)
	public User TestUser(@PathVariable String name) {  
		logger.debug("Parameter is: {}", name);
		User user = new User();
		user.setName(name);
		user.setAge(10);
		return user;
	}

post 方法

7. 上传图片

static 文件下放置html 以及上传保存的图片。(static 目录应该在resources 下面 。上图中位置是不对，不过也不影响运行)java

html文件web

<!DOCTYPE HTML>
<html>
    <head>
        <title>pictureUploading</title>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8 ">
    </head>
    <body>
     <form enctype="multipart/form-data" method="post" action="/upload">
            文件：<input type="file" name="fileUpload"/>
            <input type="submit" value="上传"/>
        </form> 
    
    </body>
</html>

FileControllerspring

@RestController
public class FileController {

	 @RequestMapping(path="/upload" ,  method=RequestMethod.POST)
	    public Object upload(MultipartFile fileUpload){
	        //获取文件名
	        String fileName = fileUpload.getOriginalFilename();
	        //获取文件后缀名
	        String suffixName = fileName.substring(fileName.lastIndexOf("."));
	        //从新生成文件名
	        fileName = UUID.randomUUID()+suffixName;
	        //指定本地文件夹存储图片
	        String filePath = "D:/eclipseWorkSpace/SpringTestOne/xw/static/";
	        try {
	            //将图片保存到static文件夹里
	            fileUpload.transferTo(new File(filePath+fileName));
	            return new Massage(0,"success to upload");
	        } catch (Exception e) {
	            e.printStackTrace();
	            return new Massage(-1,"fail to upload");
	        } 
	    }
	 
}

运行如：apache

选择文件后，点击上传，则返回上传结果信息。app

能够看到上传的图片框架

8.

只是熟悉下Spring boot框架，其中的具体原理和细节都不太清楚，后续再整理学习。dom

code：(Spring boot 初步接触 (1) )eclipse

连接: https://pan.baidu.com/s/1_qNHW3qwxnXMMmiKg4hJ7A 提取码: gjjj