elipse下使用SpringBoot+maven创建多模块项目

本文主要是介绍elipse下使用SpringBoot+maven创建多模块项目，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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"?>
<projectxsi: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"?>
<projectxsi: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

consumer-order的目录

总项目的目录

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}@Overridepublic 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

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;}@Overridepublic 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 {@Autowiredprivate 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

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。

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