如何将Springboot项目升级成Springcloud项目(有图详解)

2024-03-16 18:40:05 分类：后端 热度：285 评论： 0

如何将Springboot项目升级成Springcloud项目(有图详解)

本文以nacos为例

分为以下几个步骤
1. 下载nacos软件
2. pom文件配置
3. application.yml文件配置
4. 代码调用
5. 效果展示

一 . 下载nacos软件

1.1 下载nacos-server-2.2.0-BETA这个版本
nacos-server-2.2.0-BETA

1.2 修改nacos配置文件
打开bin目录下的startup.cmd，将第26行的
set MODE=“cluster”
改为：
set MODE=“standalone”


1.3 双击startup.cmd
如下图则表示启动成功

二. 项目中引入jar，配置文件pom.xml

springboot升级为Springcloud版本一定要对应，不然就会有很多稀奇古怪的错误

本文是将2.7.5的Springboot升级为2021.0.7的Springcloud
如图：

以下是几个关键的配置：


完整的pom.xml配置文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>***.example</groupId>
    <artifactId>cstudents</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>students</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <!--<spring-cloud-alibaba-version>2.2.5.RELEASE</spring-cloud-alibaba-version>-->
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>2021.0.7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
           <dependency>
                <groupId>***.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
               <version>2021.0.5.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>

    </dependencyManagement>


    <!-- 依赖   -->
    <dependencies>
        <dependency>
            <groupId>***.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>

        <dependency>
            <groupId>***.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>jsr305</artifactId>
                    <groupId>***.google.code.findbugs</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>HdrHistogram</artifactId>
                    <groupId>org.hdrhistogram</groupId>
                </exclusion>
            </exclusions>
        </dependency>


        <!--启动-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--测试-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--thymeleaf-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!--加载JPA-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.1</version>
        </dependency>

        <!--阿里云-->
        <dependency>
            <groupId>***.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.15</version>
        </dependency>

        <!--连接mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>

        <!--分页的插件-->
        <dependency>
            <groupId>***.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.4.5</version>
        </dependency>

        <!-- 逆向工程依赖-->
        <dependency>
            <groupId>***.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>

        <!--Mybatis-->
        <!--<dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.4.1</version>
        </dependency>-->

        <!--devtools热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
       <!-- <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>-->

    </dependencies>

    <!--<pluginRepositories>
        <pluginRepository>
            <id>alimaven spring plugin</id>
            <name>alimaven spring plugin</name>
            <url>https://maven.aliyun.***/repository/spring-plugin</url>
        </pluginRepository>
    </pluginRepositories>-->



    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>repository.springframework.maven.release</id>
            <name>Spring Framework Maven Release Repository</name>
            <url>http://maven.springframework.org/milestone/</url>
        </repository>
        <repository>
            <id>org.springframework</id>
            <url> http://maven.springframework.org/snapshot</url>
        </repository>
        <repository>
            <id>spring-milestone</id>
            <name>Spring Maven MILESTONE Repository</name>
            <url>http://repo.spring.io/libs-milestone</url>
        </repository>
        <repository>
            <id>spring-release</id>
            <name>Spring Maven RELEASE Repository</name>
            <url>http://repo.spring.io/libs-release</url>
        </repository>
    </repositories>




    <build>
        <plugins>
            <!--<plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.4.1</version>
            </plugin>-->

            <!-- 逆向工程插件-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.6</version>
                <configuration>
                    <configurationFile>GeneratorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

在升级为Springcloud时，有些jar会有冲突，本文pom.xml文件中注释掉的就是冲突的jar，但是读者得根据自己的实际情况进行增删冲突jar，不过一般就是文中的这几个

三. application.yml文件配置

server:
  port: 9080

spring:
  application:
    name: consumer

  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

注意事项：

4. 代码调用：

项目说明，项目有一个消费者（调用方），和两个生产者（被调用方）

4.1 生产者

生产者代码解析：


代码：

生产者application.yml：

server:
  port: 8081

spring:
  application:
    name: provider

  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

生产者调用代码：

本代码中设置了三种情况：
消费者调用时传输一个参数，两个参数，一个集合的三种情况：

package ***.example.test;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.Map;

@Controller
@RefreshScope
public class PrivodeController {


    @Value("${server.port}")
    String port;

    //传输一个参数
    @GetMapping("/hi")
    @ResponseBody
    public String hi(@RequestParam(value = "name", defaultValue = "forezp",required = false) String name) {
        System.out.println("666");
        String msg = "I receive msg 【" + name + "】" + ", i'm provider ,my port:" + port;
        System.out.println(msg);
        return msg;
    }

    //传输多个参数
    @GetMapping("/send")
    @ResponseBody
    public String send1(@RequestParam(value = "city", defaultValue = "Shanghai",required = false) String city,
                       @RequestParam(value = "site", defaultValue = "School",required = false) String site) {
        System.out.println("666");
        String msg = "My favorite city is " + city+ " , I want to go to " + site;
        System.out.println(msg);
        return msg;
    }

    //传输Map
    @GetMapping("/send2")
    @ResponseBody
    public String send2(@RequestParam Map data) {
        System.out.println("666");
        String msg = "My name is " + data.get("name")+ " , I am " + data.get("age") + " years old.";
        System.out.println(msg);
        return msg;
    }
}

生产者启动类：

package ***.example;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.RestController;

@MapperScan("***.example.mapper")
@SpringBootApplication
@RestController
@EnableDiscoveryClient
public class StudentsApplication {

    public static void main(String[] args) {
        SpringApplication.run(StudentsApplication.class, args);
    }

}

4.2 消费者

消费者代码解析：

消费者代码：

消费者application.yml

server:
  port: 9080

spring:
  application:
    name: consumer

  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

消费者接口：

package ***.example.test;

import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.Map;

@FeignClient(value = "provider" )
@RefreshScope
public interface ProviderClient {

    @GetMapping("/hi")
    String hi(@RequestParam(value = "name", defaultValue = "hello", required = false) String name);

    @GetMapping("/send1")
    String send1(@RequestParam(value = "city", defaultValue = "Shanghai", required = false) String city,
                @RequestParam(value = "site", defaultValue = "School", required = false) String site);

    @GetMapping("/send2")
    String send2(@RequestParam  Map data);
}

消费者实现类：

package ***.example.test;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

@Controller
public class ConsumerController {

    @Autowired
    ProviderClient providerClient;

    //传输一个参数
    @GetMapping("/canos")
    @ResponseBody
    public String hiFeign(){
        System.out.println("哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈");
        return providerClient.hi("你好，我这边发出了信息。。。。。");
    }

    //传输多个参数
    @GetMapping("/test")
    @ResponseBody
    public String hiNacos(){
        System.out.println("666");
        return providerClient.send1("Beijing","Tiananmen");
    }

    //传输Map
    @GetMapping("/test2")
    @ResponseBody
    public String hiNacos2(){
        System.out.println("777");
        Map<String,String> data = new HashMap<String,String>();
        data.put("name","Jack");
        data.put("age","18");
        return providerClient.send2(data);
    }
}

5. 效果展示：

双击启动nacos:

登录nocas:
用户名和密码默认是：nacos

启动一个消费者CStudents_C、两个生产者CStudents_P1、CStudents_P2

观察naocs控制面板：


可以对服务进行上线下线或者分配权重：

调用效果展示：

转载请说明出处内容投诉
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