从零开始搭建springCloud项目

先下载nacos.要能登录就行。要注意放开相关端口

docker run -d --name nacos --restart=always --network=host -e MODE=standalone        -p 9848:9848 -p 9849:9849 -p 8848:8848   nacos/nacos-server

创建父工程，pom，写好依赖，我也不知道为什么这么多

<?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>
    <artifactId>obwt-cloud</artifactId>
    <groupId>com.obwt</groupId>
    <version>0.0.1-SNAPSHOT</version>
    <!--用来存放子项目 在子项目为创建的时候可以先注释-->
    <modules>
        <module>bms-cloud</module>
        <module>gateway-cloud</module>
        <!--        <module>tms-cloud</module>-->
<!--        <module>wms-cloud</module>-->
<!--        <module>oms-cloud</module>-->
    </modules>
    <packaging>pom</packaging>

    <!--统一对jar包版本进行管理
    子模块继承之后，提供作用： 锁定版本+子modlue不用写groupId和version -->
    <properties>
        <!-- 指定SpringBoot版本 -->
        <spring-boot.version>2.5.3</spring-boot.version>
        <!-- 指定SpringCloud版本 -->
        <spring-cloud.version>2020.0.3</spring-cloud.version>
        <!-- 指定SpringCloudAlibaba版本 -->
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
        <alibaba.nacos.version>2.0.3</alibaba.nacos.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.18.14</lombok.version>
        <mysql.version>5.1.41</mysql.version>
        <druid.version>1.2.6</druid.version>
        <mybatis.spring.boot.version>2.2.0</mybatis.spring.boot.version>
        <mybaits.plus.version>3.3.2</mybaits.plus.version>
        <alibaba.json.version>1.2.75</alibaba.json.version>
        <!--指定jdk版本-->
        <java.version>1.8</java.version>
        <spring-cloud-starter-bootstrap.version>3.0.2</spring-cloud-starter-bootstrap.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <!--spring boot 2.2.2-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud Hoxton.SR1-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>${mybatis.spring.boot.version}</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
                <optional>true</optional>
            </dependency>
            <!-- bootstrap 启动器 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-bootstrap</artifactId>
                <version>${spring-cloud-starter-bootstrap.version}</version>
            </dependency>
            <!--mybatis plus-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybaits.plus.version}</version>
            </dependency>
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-core</artifactId>
                <version>${mybaits.plus.version}</version>
                <scope>compile</scope>
            </dependency>
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-extension</artifactId>
                <version>${mybaits.plus.version}</version>
                <scope>compile</scope>
            </dependency>
            <!--json-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>${alibaba.json.version}</version>
            </dependency>
        </dependencies>

    </dependencyManagement>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <addResources>true</addResources>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

创建子模块，gateway-cloud

<?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>
    <parent>
        <groupId>com.obwt</groupId>
        <artifactId>obwt-cloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>gateway-cloud</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>


        <!--nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</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-gateway</artifactId>
        </dependency>

    </dependencies>

</project>

server:
  port: 8888
spring:
  application:
    # 服务名称
    name: gateway-cloud
  profiles:
    active: dev
  cloud:
    nacos:
      #discovery 服务注册
      discovery:
        server-addr:  0:8848
        #分组
        group: DEFAULT_GROUP
        # 注册到nacos上的服务名称，默认{${spring.application.name}
        service: ${spring.application.name}
        namespace: 96ee7 f50 #命
      #config 读取nacos上的服务配置
      config:
        file-extension: yaml
        #分组
        group: DEFAULT_GROUP
        server-addr:  0:8848
        namespace: 96ee7 f50 #命


 

他会去nacos获取相应配置。

spring:
  cloud:
    # Spring Cloud Gateway 配置项，对应 GatewayProperties 类
    gateway:
      # 路由配置项，对应 RouteDefinition 数组
      routes:
        - id: yudaoyuanma # 路由的编号
          uri: http://www.iocoder.cn # 路由到的目标地址
          predicates: # 断言，作为路由的匹配条件，对应 RouteDefinition 数组
            - Path=/blog
          filters:
            - StripPrefix=1
        - id: oschina # 路由的编号
          uri: https://www.oschina.net # 路由的目标地址
          predicates: # 断言，作为路由的匹配条件，对应 RouteDefinition 数组
            - Path=/oschina
          filters: # 过滤器，对请求进行拦截，实现自定义的功能，对应 FilterDefinition 数组
            - StripPrefix=1

这样就可以动态修改路由了。

可以按照路由访问8888端口，/blog,就跳到其他站点了。

下载代码：https://download.csdn.net/download/ldy889/89320374