腾讯云 云函数 最简单的hello Demo

目录

一、总得来说，有三个步骤：

二、具体

2.1 创建一个简单的maven项目

2.1.1 maven框架

2.1.2 代码

2.2 使用maven创建jar部署包

2.3 构建云函数

---

一、总得来说，有三个步骤：

1. 创建一个简单的maven项目
2. 使用maven创建jar部署包
3. 构建云函数

二、具体

2.1 创建一个简单的maven项目

2.1.1 maven框架

参考：https://blog.csdn.net/ichuany/article/details/84792190

备注：只是参考链接，构建maven的框架就好，里面的代码啥的 不需要参考

2.1.2 代码

参考官方文档：文档中心 > 云函数 > 开发指南 > Java > Java 说明：

https://cloud.tencent.com/document/product/583/12214

Java 开发的 SCF 云函数的代码形态一般如下所示：

package example;

public class Hello {
    public Hello() {
    }

    public String mainHandler(KeyValueClass kv) {
        System.out.println("Hello world!");
        System.out.println(String.format("key1 = %s", kv.getKey1()));
        System.out.println(String.format("key2 = %s", kv.getKey2()));
        return String.format("Hello Yangkeke");
    }
}

建立参数 KeyValueClass 类：

package example;

public class KeyValueClass {
    String key1;
    String key2;

    public String getKey1() {
        return this.key1;
    }

    public void setKey1(String key1) {
        this.key1 = key1;
    }

    public String getKey2() {
        return this.key2;
    }

    public void setKey2(String key2) {
        this.key2 = key2;
    }

    public KeyValueClass() {
    }
}

pom.xml

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>examples</groupId>
    <artifactId>java-example</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>java-example</name>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <createDependencyReducedPom>false</createDependencyReducedPom>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

2.2 使用maven创建jar部署包

编译打包

在项目文件夹根目录下执行命令 mvn package，应有编译输出类似如下：

D:\workcode\Maven\spring-helloworld>mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< examples:java-example >------------------------
[INFO] Building java-example 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ java-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ java-example ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 2 source files to D:\workcode\Maven\spring-helloworld\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ java-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\workcode\Maven\spring-helloworld\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ java-example ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ java-example ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ java-example ---
[INFO] Building jar: D:\workcode\Maven\spring-helloworld\target\java-example-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-shade-plugin:2.3:shade (default) @ java-example ---
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing D:\workcode\Maven\spring-helloworld\target\java-example-1.0-SNAPSHOT.jar with D:\workcode\Maven\spring-helloworld\target\java-example-1.0-SNAPSHOT-shaded.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.687 s
[INFO] Finished at: 2020-09-30T14:00:30+08:00
[INFO] ------------------------------------------------------------------------

2.3 构建云函数

地址：https://console.cloud.tencent.com/scf/list?rid=8&ns=default

选择jar包

点击“测试”