GraphQL查询在Postman上进行测试时语法无效 Springboot服务器

如何解决GraphQL查询在Postman上进行测试时语法无效 Springboot服务器

springboot应用程序在端点“ localhost：8091 / rest / books”上公开graphql API。当我用邮递员测试它作为graphQL类型在正文中传递查询时，它给出错误“无效语法”，而当我通过相同的查询作为原始文本时，它会产生正确的结果。我正在使用HSQL。我的应用程序的结构是：

文件及其代码分别为：

Book.java

package com.techprimers.graphql.springbootgrapqlexample.model;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

//@AllArgsConstructor
//@NoArgsConstructor
@Setter
@Getter
@Table
@Entity
public class Book {

    @Id
    private String isn;
    public Book() {
        super();
    }
    public Book(String isn,String title,String publisher,String[] authors,String publishedDate) {
        super();
        this.isn = isn;
        this.title = title;
        this.publisher = publisher;
        this.authors = authors;
        this.publishedDate = publishedDate;
    }
    public String getIsn() {
        return isn;
    }
    public void setIsn(String isn) {
        this.isn = isn;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getPublisher() {
        return publisher;
    }
    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }
    public String[] getAuthors() {
        return authors;
    }
    public void setAuthors(String[] authors) {
        this.authors = authors;
    }
    public String getPublishedDate() {
        return publishedDate;
    }
    public void setPublishedDate(String publishedDate) {
        this.publishedDate = publishedDate;
    }
    private String title;
    private String publisher;
    private String[] authors;
    private String publishedDate;

}

BookRepository.java

package com.techprimers.graphql.springbootgrapqlexample.repository;

import com.techprimers.graphql.springbootgrapqlexample.model.Book;
import org.springframework.data.jpa.repository.JpaRepository;

public interface BookRepository extends JpaRepository<Book,String> {
}

BookResource.java

package com.techprimers.graphql.springbootgrapqlexample.resource;

import com.techprimers.graphql.springbootgrapqlexample.service.GraphQLService;
import graphql.ExecutionResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@CrossOrigin(origins = "http://localhost:3000")
@RequestMapping("/rest/books")
@RestController
public class BookResource {

    @Autowired
    GraphQLService graphQLService;

    @PostMapping
    public ResponseEntity<Object> getAllBooks(@RequestBody String query) {
        ExecutionResult execute = graphQLService.getGraphQL().execute(query);

        return new ResponseEntity<>(execute,HttpStatus.OK);
    }
}

AllBooksDataFetcher.java

package com.techprimers.graphql.springbootgrapqlexample.service.datafetcher;

import com.techprimers.graphql.springbootgrapqlexample.model.Book;
import com.techprimers.graphql.springbootgrapqlexample.repository.BookRepository;
import graphql.schema.DataFetcher;
import graphql.schema.DataFetchingEnvironment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
public class AllBooksDataFetcher implements DataFetcher<List<Book>>{

    @Autowired
    BookRepository bookRepository;

    @Override
    public List<Book> get(DataFetchingEnvironment dataFetchingEnvironment) {
        return bookRepository.findAll();
    }
}

BookDataFetcher.java

package com.techprimers.graphql.springbootgrapqlexample.service.datafetcher;

import com.techprimers.graphql.springbootgrapqlexample.model.Book;
import com.techprimers.graphql.springbootgrapqlexample.repository.BookRepository;
import graphql.schema.DataFetcher;
import graphql.schema.DataFetchingEnvironment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class BookDataFetcher implements DataFetcher<Book>{

    @Autowired
    BookRepository bookRepository;

    @Override
    public Book get(DataFetchingEnvironment dataFetchingEnvironment) {

        String isn = dataFetchingEnvironment.getArgument("id");

        return bookRepository.findById(isn).get();
    }
}

在资源文件夹中是 Books.graphql（包含架构）

schema {
 query: Query
}

type Query {
 allBooks: [Book]
 book(id: String): Book
}

type Book {
  isn: String
  title: String
  publisher: String
  authors: [String]
  publishedDate: String
}