如何使用Apollo GraphQL生成Java客户端? [英] How to generate java client using Apollo GraphQL?

问题描述

我尝试了官方文档中提到的步骤，但显示错误:不受支持的目标:java

I have tried steps mentioned in the official doc but it showing Error: Unsupported target: java

在CLI帮助中，未将Java列为目标

In CLI help, java is not listed as a target

推荐答案

服务器设置

使用GraphQL Server进行Spring Boot: https://www.graphql-java.com/tutorials/getting-started-with-spring-boot/

Spring Boot with GraphQL Server: https://www.graphql-java.com/tutorials/getting-started-with-spring-boot/

完整的GraphQL服务器代码可在GitHub上找到: https://github.com/graphql-java/tutorials/tree/master/book-details

Full working GraphQL server code exist on GitHub: https://github.com/graphql-java/tutorials/tree/master/book-details

客户

从架构生成GraphQL查询代码

Generate GraphQL Query Code from schema

• 使用以下build.gradle创建Java项目

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.apollographql.apollo:apollo-gradle-plugin:0.5.0'
    }
}

plugins {
    id 'java'
}

apply plugin: 'com.apollographql.android'

group = 'com.graphql-java.tutorial'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

repositories {
    jcenter()
}

dependencies {
    compile group: 'com.apollographql.apollo', name: 'apollo-runtime', version: '0.5.0'
}

• 创建GraphQL查询文件(BookById.graphQL)，将生成相同的命名Java文件(参考:
  • Create GraphQL Query file (BookById.graphQL), same namedjava file will be generated (Reference: https://www.apollographql.com/docs/android/essentials/get-started.html#creating-graphql-file)
  • Put BookById.graphQL file in main.graphql package with expected package hierarchy Example: main/graphql/com/apollographql/apollo/sample/BookById.graphql;

  • Download schema.jsonfromthe GraphQL server endpoint Go to CLI, run below command, it will generate schema.json

    阿波罗服务:下载--endpoint = http://localhost:8080/graphql

  • 将 schema.json 放入 main/graphql

    运行Gradle构建任务，它将在 Build/generation/source/apollo 中生成客户端查询代码，其包结构与 BookById.graphql

    Run Gradle build task it will generate Client Query Code in Build/generated/source/apollo with same package structure as of BookById.graphql

    BookByIdQuery.java

    BookByIdQuery.java

    参考:

    服务器GraphQL-Java: https://www.graphql-java.com/documentation/master/

    Server GraphQL-Java : https://www.graphql-java.com/documentation/master/

    Apollo客户端: https://www.apollographql.com/docs/android/essentials/get-started.html

    Apollo Client: https://www.apollographql.com/docs/android/essentials/get-started.html

    带有GraphQL查询示例的Spring Boot |技术入门手册: https://youtu.be/zX2I7-aIldE

    Spring Boot with GraphQL Query Example | Tech Primers: https://youtu.be/zX2I7-aIldE

    使用GraphQL和Spring构建数据API"-新加坡API Craft: https://youtu.be/GmR2uIDZEyM

    "Building a data API with GraphQL and Spring" - API Craft Singapore: https://youtu.be/GmR2uIDZEyM

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