graphQLjava实战（转）

参考：

https://www.jianshu.com/p/331a3e1aeba2

https://www.jianshu.com/p/1d4d73040770

https://blog.csdn.net/JavaMonsterr/article/details/125147335

https://www.cnblogs.com/chenglc/p/13743773.html

pom依赖添加

 <dependency>
            <groupId>com.graphql-java</groupId>
            <artifactId>graphql-java</artifactId>
            <version>15.0</version>
        </dependency>
        <dependency>
            <groupId>com.graphql-java</groupId>
            <artifactId>graphql-spring-boot-starter</artifactId>
            <version>3.6.0</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.11.0</version>
            <scope>compile</scope>
        </dependency>

测试文件

public class GraphQLSDLDemoV2 {
    public static String schema = "schema {\n" +
            "    query: ApiQuery\n" +
            "}\n" +
            "\n" +
            "\n" +
            "type ApiQuery {\n" +
            "    queryApiById(id:ID) : Api\n" +
            "}\n" +
            "\n" +
            "\n" +
            "type Api {\n" +
            "    #!表示非空\n" +
            "    id: ID\n" +
            "    api_name:String\n" +
            "    api_desc:String\n" +
            "    method:String\n" +
            "    ds_name:String\n" +
            "    params:String\n" +
            "    query_sql:String\n" +
            "}";
    public static String js = "{\"id\":1,\"api_name\":\"/home/test\",\"api_desc\":\"测试接口vvv\",\"method\":\"GET\",\"params\":null,\"ds_name\":\"slave1\",\"query_sql\":\"select * from api_config_basic limit 1\",\"result_filter\":null,\"result_transform\":null,\"result_type\":\"LIST\",\"result_desc\":null,\"depend_api\":null,\"update_time\":null}";

    public static void main(String[] args) {
        //解析文件
        TypeDefinitionRegistry typeDefinitionRegistry = new SchemaParser().parse(schema);

//       获取对象类型数据
//         RuntimeWiring wiring = RuntimeWiring.newRuntimeWiring()
//                .type("ApiQuery", builder ->
//                        builder.dataFetcher("queryApiById", (DataFetcher<String>) environment -> {
//                            return getApi();
//                        })
//                )
//                .build();

        RuntimeWiring wiring2 = RuntimeWiring.newRuntimeWiring()
                .type(newTypeWiring("ApiQuery").dataFetcher("queryApiById",getBookByIdDataFetcher()))
                .build();


        GraphQLSchema graphQLSchema = new SchemaGenerator().makeExecutableSchema(typeDefinitionRegistry, wiring2);

        GraphQL graphQL = GraphQL.newGraphQL(graphQLSchema).build();

        String query = "{queryApiById(id:1){id,api_name,api_desc}}";
        ExecutionResult result = graphQL.execute(query);

        System.out.println("query: " + query);
        System.out.println(result.toSpecification());
    }

    @NotNull
    public static String getApi() {
        Api api = new Api();
        api.setId(1);
        api.setApi_name("/home/test");
        api.setApi_desc("测试接口");
        api.setDs_name("slave1");
        api.setQuery_sql("select * from api_config_basic limit 1");
        return JSON.toJSONString(api);
    }

    public static DataFetcher getBookByIdDataFetcher() {
        return dataFetchingEnvironment -> {
            String bookId = dataFetchingEnvironment.getArgument("id");
            return JSON.parseObject(js);
//            return getApiMap();
        };
    }

    public static Map<String,Object>  getApiMap() {
        Map<String,Object> api = new HashMap<>();
        api.put("id",1);
        api.put("api_name","/home/test");
        api.put("api_desc","测试接口");
        api.put("ds_name","slave1");
        api.put("query_sql","select * from api_config_basic limit 1");
        return api;
    }
}

经过改造，graphQL可以接收json或map的数据，经过转换后以json格式展示出去。