GraphQL GraphQL既是一种用于API的查询语言也是一个满足你数据查询的运行时。GraphQL对你的API中的数据提供了一套易于理解的完整描述，使得客户端能够准确地获得它需要的数据，而且没有任何冗余，也让API更容易地随着时间推移而演进，还能用于构建强大的开发工具。
启动后界面如上图所示
1.1 添加依赖 org.springframework.boot spring-boot-starter
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.graphql-java</groupId>
<artifactId>graphql-java-tools</artifactId>
<version>5.2.4</version>
</dependency>
<dependency>
<groupId>com.graphql-java</groupId>
<artifactId>graphql-spring-boot-starter</artifactId>
<version>5.0.2</version>
</dependency>
<dependency>
<groupId>com.graphql-java</groupId>
<artifactId>graphiql-spring-boot-starter</artifactId>
<version>5.0.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
1.2 编写graphqls文件 type Query { pets: [Pet] animals: [Animal] }
type Pet { id: Int type: Animal name: String age: Int }
enum Animal { DOG CAT BADGER MAMMOTH OOOOOO } 本人用的idea编写graphqls文件，可以安装graphql插件，
配置文件类型
1.3 编写实体类 package com.example.demo;
public class Pet { private long id;
private String name;
private Animal type;
private int age;
public Pet(long id, String name, Animal type, int age) {
this.id = id;
this.name = name;
this.type = type;
this.age = age;
}
public Pet() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Animal getType() {
return type;
}
public void setType(Animal type) {
this.type = type;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
} package com.example.demo;
public enum Animal { /** * Animal */ DOG, CAT, BADGER, MAMMOTH, OOOOOO } 1.4 编写查询组件 package com.example.demo;
import com.coxautodev.graphql.tools.GraphQLQueryResolver; import org.springframework.stereotype.Component;
import java.util.ArrayList; import java.util.List;
@Component public class Query implements GraphQLQueryResolver { public List pets() { List pets = new ArrayList<>();
Pet aPet = new Pet();
aPet.setId(1L);
aPet.setName("Covey's cat");
aPet.setAge(3);
aPet.setType(Animal.CAT);
pets.add(aPet);
return pets;
}
public List<Animal> animals() {
Animal animal = Animal.MAMMOTH;
Animal animal1 = Animal.BADGER;
Animal animal2 = Animal.CAT;
Animal animal3 = Animal.OOOOOO;
Animal animal4 = Animal.DOG;
List<Animal> animalList = new ArrayList<>(4);
animalList.add(animal);
animalList.add(animal1);
animalList.add(animal2);
animalList.add(animal3);
animalList.add(animal4);
return animalList;
}
} 本章节介绍完，后面待续...
参考资料：
