Spring Cloud 環境搭建

1、開發環境設置

1.1 文件編碼

1.2 文件過濾

1.3 編譯版本

2、示例工程

多模塊組織結構，以Eureka服務器爲例。

2.1 工程結構

2.2 父工程POM

<?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>2.2.7.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>upc.sprite</groupId>
    <artifactId>spring-cloud-2020</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud-2020</name>
    <packaging>pom</packaging>
    <description>Demo project for Spring Boot Cloud</description>
    <modules>
        <module>cloud-provider-payment-8081</module>
    </modules>

    <properties>
        <java.version>1.8</java.version>
        <druid.version>1.1.10</druid.version>
        <mybatis.version>2.1.2</mybatis.version>
        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

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

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

        <!-- druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!-- mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <!-- spring cloud dependency -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <!-- spring boot test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <!-- spring cloud dependencyManagement -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!-- build plugin -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.3 子模塊POM

<?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>upc.sprite</groupId>
        <artifactId>spring-cloud-2020</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>upc.sprite</groupId>
    <artifactId>cloud-provider-payment-8081</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud-provider-payment-8081</name>
    <description>Demo project for Spring Boot</description>

</project>

2.4 Eureka 服務

@EnableEurekaServer
@SpringBootApplication
public class CloudProviderPayment8081Application {

    public static void main(String[] args) {
        SpringApplication.run(CloudProviderPayment8081Application.class, args);
    }

}

訪問：http://localhost:8080/

# 消除異常信息
eureka.client.register-with-eureka=false

3、業務調用

View -> Controller -> Service -> Dao -> Entities -> MySQL

4、返回結果

code + message + data 實現先後端分離

CommonResult.java

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommonResult<T> {
    private Integer code;
    private String  message;
    private T       data;

    public CommonResult(Integer code, String message) {
        this(code, message, null);
    }
}

返回前端結果：

{
    "code": 200,
    "message": "查詢成功",
    "payload": {
        "id": 2,
        "serial": "1259027999300726785"
    }
}