elipse下使用SpringBoot+maven创建多模块项目

短命女 2021-10-14 05:24 415阅读 0赞

这里只使用一个生产者和一个消费者的例子

## 1.创建总的项目 ##

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
    <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>per.czt</groupId>
    	<artifactId>microservicedemo</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>pom</packaging>
    	<modules>
    		<module>consumer-order</module>
    		<module>provider-user</module>
    	</modules>
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.2.RELEASE</version>
    	</parent>
    	<dependencies>
    		
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>ch.qos.logback</groupId>
    			<artifactId>logback-core</artifactId>
    			<version>1.2.3</version>
    		</dependency>
    		<dependency>
    			<groupId>ch.qos.logback</groupId>
    			<artifactId>logback-classic</artifactId>
    			<version>1.2.3</version>
    		</dependency>
    
    	</dependencies>
    	<build>
    		<plugins>
    			<plugin>
    
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    
    			</plugin>
    		</plugins>
    	</build>
    </project>

## 2.创建生产者项目和消费者项目 ##

在总的项目下分别新建一个maven module，一个provider-user，另一个为consumer-order  
provider-user的pom.xml

<?xml version="1.0"?>
    <project
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    	xmlns="http://maven.apache.org/POM/4.0.0"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>per.czt</groupId>
    		<artifactId>microservicedemo</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    	<groupId>per.czt</groupId>
    	<artifactId>provider-user</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>provider-user</name>
    	<url>http://maven.apache.org</url>
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    
    	</dependencies>
    </project>

consumer-order的pom.xml

<?xml version="1.0"?>
    <project
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    	xmlns="http://maven.apache.org/POM/4.0.0"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>per.czt</groupId>
    		<artifactId>microservicedemo</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    	<groupId>per.czt</groupId>
    	<artifactId>consumer-order</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>consumer-order</name>
    	<url>http://maven.apache.org</url>
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    </project>

创建完成后项目目录如下

provider-user项目  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70]  
consumer-order的目录  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70 1]  
总项目的目录  
![在这里插入图片描述][20190818175557620.PNG]

## 3.编写生产者代码，测试 ##

在src/main/resources下新建application.properties配置文件

server.port=7900
    spring.application.name=provider-user

新建一个User类

package org.provider.user.pojo;
    
    
    
    public class User {
    	
    	private Long id;
    	private java.util.Date date;
    	public Long getId() {
    		return id;
    	}
    	public void setId(Long id) {
    		this.id = id;
    	}
    	public java.util.Date getDate() {
    		return date;
    	}
    	public void setDate(java.util.Date date) {
    		this.date = date;
    	}
    	public User() {
    		super();
    		// TODO Auto-generated constructor stub
    	}
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", date=" + date + "]";
    	}
    	public User(Long id) {
    		super();
    		this.id = id;
    		this.date=new java.util.Date();
    		
    	}
    }

编写UserController

package org.provider.user.controller;
    
    import org.provider.user.pojo.User;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class UserController {
    	@RequestMapping(value="/user/{id}",method=RequestMethod.GET)
    	public User getUser(@PathVariable("id")Long id) {
    		return new User(id);
    	}
    
    }

编写启动类

package org.provider.user;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * Hello world!
     *
     */
    @SpringBootApplication
    public class ProviderUser 
    {
        public static void main( String[] args )
        {
            SpringApplication.run(ProviderUser.class, args);
        }
    }

启动该项目  
![在这里插入图片描述][20190818180139156.PNG]

## 4.编写消费者代码，测试 ##

application.properties

server.port=8900
    spring.application.name=consumer-order
    user.url=http://127.0.0.1:7900/user/

同样新建一个User类

package org.consumer.order.pojo;
    
    import java.util.Date;
    
    public class User {
    
    	private Long id;
    	private java.util.Date date;
    	public Long getId() {
    		return id;
    	}
    	public void setId(Long id) {
    		this.id = id;
    	}
    	public java.util.Date getDate() {
    		return date;
    	}
    	public void setDate(java.util.Date date) {
    		this.date = date;
    	}
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", date=" + date + "]";
    	}
    	public User(Long id) {
    		super();
    		this.id = id;
    		this.date=new Date();
    	}
    	public User() {
    		super();
    		// TODO Auto-generated constructor stub
    	}
    }

编写OrderController

package org.consumer.order.controller;
    
    import org.consumer.order.pojo.User;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    @RestController
    public class OrderController {
    	@Autowired
    	private RestTemplate restTemplate;//spring提供的用于访问rest接口的模板对象
    	@Value("${user.url}")
    	private String url;
    	@GetMapping("/order/{id}")
    	public User getOrder(@PathVariable("id")Long id) {
    		//访问提供者,获取数据
    		User user=restTemplate.getForObject(url+id, User.class);
    		return user;
    	}
    
    }

编写启动类

package org.consumer.order;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.client.RestTemplate;
    
    /**
     * Hello world!
     *
     */
    @SpringBootApplication
    public class ConsumerOrder 
    {
        //获取RestTemplate对象
    	@Bean//相当于xml中的Bean标签,主要用于调用当前方法获取到指定对象
    	public RestTemplate getRestTemplate() {
    		return new RestTemplate();
    	}
        public static void main( String[] args )
        {
            SpringApplication.run(ConsumerOrder.class, args);
        }
    }

启动该项目  
![在这里插入图片描述][20190818180514834.PNG]  
分析:这里我们使用application.properties中获取User服务，然而如果url地址坏了或出现问题或者该服务停了怎么办。这里我们可用微服务框架springcloud，dubbo等，框架里包含了服务的注册与发现的服务组件，可以为我们解决这些问题。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70]: /images/20211013/a3b2a65466524c5fb0c2001e4b55dc17.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70 1]: /images/20211013/3cfdb95294f64c9cb61b67fe225ac2d8.png
[20190818175557620.PNG]: /images/20211013/03e6701583cd4146830823decb6ff23c.png
[20190818180139156.PNG]: /images/20211013/6605ae3b65284eda8bd22f5635814f53.png
[20190818180514834.PNG]: /images/20211013/48b2a47a6ba5401ba9a70f30edc7b1e7.png