graphqlize 官方文档已经很齐全了，以下是简单的试用（spring boot 项目）
项目使用mven 管理，同时包含了playgroup 以及voyager
基础环境准备
主要是pg 使用docker-compose 运行
- docker-compose 文件
version: "3"
services:
pg:
image: postgres:11-alpine
ports:
- "5432:5432"
environment:
- "POSTGRES_PASSWORD=dalong"
- 启动&&初始化数据
docker-compose up -d
导入sql-schema 目录下的 postgres-sakila-schema.sql 以及postgres-sakila-insert-data.sql
代码集成
因为graphqlize就是一个library，可以直接引用，按照要求添加配置即可
- 项目结构
├── docker-compose.yaml
├── pom.xml
├── sql-schema
│ └── postgres-sakila-db
│ ├── postgres-sakila-delete-data.sql
│ ├── postgres-sakila-drop-objects.sql
│ ├── postgres-sakila-insert-data.sql
│ └── postgres-sakila-schema.sql
└── src
├── main
│ ├── java
│ │ └── com
│ │ └── example
│ │ └── demo
│ │ ├── DemoApplication.java
│ │ ├── GraphQLController.java
│ │ └── GraphQLizeResolverProvider.java
│ └── resources
│ ├── application.properties
│ └── static
│ ├── playground.html
│ └── voyager.html
- pom.xml
<?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>2.2.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.graphqlize</groupId>
<artifactId>graphqlize-java</artifactId>
<version>0.1.0-alpha4</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.10</version>
</dependency>
<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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
- 代码说明
数据源配置 application.properties
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres
spring.datasource.password=dalong
graphqlize provider 配置 GraphQLizeResolverProvider.java
package com.example.demo;
import org.graphqlize.java.GraphQLizeResolver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import javax.sql.DataSource;
import java.util.Map;
@Component
public class GraphQLizeResolverProvider {
private final DataSource dataSource;
private final GraphQLizeResolver graphQLizeResolver;
public GraphQLizeResolverProvider(DataSource dataSource) {
this.dataSource = dataSource;
graphQLizeResolver = new GraphQLizeResolver(dataSource);
}
@Bean
public GraphQLizeResolver graphQLizeResolver() {
return this.graphQLizeResolver;
}
}
graphql api endpoint 配置
package com.example.demo;
import org.graphqlize.java.GraphQLResolver;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.Map;
class GraphQLRequest {
private String query;
public String getQuery() {
return query;
}
public void setQuery(String query) {
this.query = query;
}
public Map<String, Object> getVariables() {
return variables;
}
public void setVariables(Map<String, Object> variables) {
this.variables = variables;
}
private Map<String, Object> variables;
}
@RestController
public class GraphQLController {
private final GraphQLResolver graphQLResolver;
public GraphQLController(GraphQLResolver graphQLResolver) {
this.graphQLResolver = graphQLResolver;
}
@PostMapping("/graphql")
public ResponseEntity handle(@RequestBody GraphQLRequest graphQLRequest) {
String result =
graphQLResolver.resolve(
graphQLRequest.getQuery(),
graphQLRequest.getVariables());
return ResponseEntity.ok()
.header(HttpHeaders.CONTENT_TYPE, "application/json")
.body(result);
}
}
启动&&使用
- 启动
mvn spring-boot:run
- playgroud 效果
voyager 效果 
说明
graphqlize 是一个很值得使用的类似hasura 的graphql 工具
参考资料
https://www.graphqlize.org/docs/getting_started/java/springboot
https://github.com/rongfengliang/graphqlize-docker-compose
https://github.com/graphqlize/graphqlize