graphql java demo_GraphQL Java Demo代码
mvn 引用GraphQL
com.graphql-java
graphql-java
11.0
1. 创建数据类
package com.demo.graph;
public class CPU {
private String name;
private String cache;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCache() {
return cache;
}
public void setCache(String cache) {
this.cache = cache;
}
}
package com.demo.graph;
public class Memory {
private String name;
private String size;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSize() {
return size;
}
public void setSize(String size) {
this.size = size;
}
}
package com.demo.graph;
import java.util.List;
public class Computer {
private String name;
private CPU cpu;
private List memoryList;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public CPU getCpu() {
return cpu;
}
public void setCpu(CPU cpu) {
this.cpu = cpu;
}
public List getMemoryList() {
return memoryList;
}
public void setMemoryList(List memoryList) {
this.memoryList = memoryList;
}
}
2. 创建测试类
package com.demo.graph;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import graphql.GraphQL;
import graphql.schema.GraphQLList;
import graphql.schema.GraphQLObjectType;
import graphql.schema.GraphQLSchema;
import static graphql.Scalars.GraphQLString;
import static graphql.schema.GraphQLFieldDefinition.newFieldDefinition;
import static graphql.schema.GraphQLObjectType.newObject;
public class GraphQLDemoTest {
public static void main(String[] args) {
CPU cpu = new CPU();
cpu.setName("I7");
cpu.setCache("19M");
Memory m1 = new Memory();
m1.setName("海盗船");
m1.setSize("8G");
Memory m2 = new Memory();
m2.setName("海盗船");
m2.setSize("8G");
List memoryList = new ArrayList();
memoryList.add(m1);
memoryList.add(m2);
Computer computer = new Computer();
computer.setName("组装机");
computer.setCpu(cpu);
computer.setMemoryList(memoryList);
// 定义GraphQL类型
GraphQLObjectType cpuType = newObject().name("cpuType")
.field(newFieldDefinition().name("name").type(GraphQLString))
.field(newFieldDefinition().name("cache").type(GraphQLString)).build();
GraphQLObjectType memoryType = newObject().name("memoryType")
.field(newFieldDefinition().name("name").type(GraphQLString))
.field(newFieldDefinition().name("size").type(GraphQLString)).build();
GraphQLObjectType computerType = newObject().name("computerType")
.field(newFieldDefinition().name("name").type(GraphQLString))
.field(newFieldDefinition().name("cpu").type(cpuType))
.field(newFieldDefinition().name("memoryList").type(new GraphQLList(memoryType))).build();
// 关联返回类型与返回数据
GraphQLObjectType queryType = newObject().name("computerQuery")
.field(newFieldDefinition().type(computerType).name("computer").dataFetcher(evn -> {
return computer;
})).build();
GraphQLSchema schema = GraphQLSchema.newSchema().query(queryType).build();
GraphQL graphQL = GraphQL.newGraphQL(schema).build();
Map result = graphQL.execute("{computer{name,cpu{name,cache},memoryList{name,size}}}")
.getData();
// 打印返回结果
System.out.println(result);
}
}