#JSON-RPC

• 支持utf-8编码
• 方法不可重名
• 支持JSONP请求，参数名jsonpCallback、callback

##GET请求协议

• method：必须
• params:
  • 普通参数：name=value -> ["value"]
  • 对象参数：obj.a=v -> [{"a":"v"}]
  • 复合参数：name=value & obj.a=a & obj.b.c=c -> ["value",{"a":"a", "b":{"c":"c"}}]

请求的参数名与方法形式参数名一一匹配，method=func&name=n&user.name=n对应了方法func(name,user)

GET请求：/com.jsonrpc.UserService?method=save&name=newname&user.name=oldname&user.age=18&user.ok=true
转换后的JSON内容：{"method":"newname","params":["newname",{"name":"oldname","age":"1","ok":"true"}]}
实际会调用com.jsonrpc.UserService.save(name,user)方法

##POST请求协议

接收JSON数据流

• id:请求编号
• method:方法名
• params:参数数组

##Spring集成

Server端

<bean id="rpcServiceImpl" class="com.jsonrpc.RpcService" />

<bean class="com.jsonrpc.server.spring.JsonrpcServerFactoryBean">
	<property name="port" value="8000" />
	<property name="poolSize" value="300" />
	<property name="services">
		<map>
			<entry key="com.jsonrpc.RpcService" value-ref="rpcServiceImpl" />
		</map>
	</property>
</bean>

//启动Server端
public static void main(String[] args) {
	ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
	ctx.registerShutdownHook();
	ctx.close();
}

Client端

<bean id="JsonrpcProxyFactory" abstract="true" class="com.jsonrpc.client.spring.JsonrpcProxyFactoryBean">
	<property name="url" value="http://localhost:8000" />
	<property name="connectTimeout" value="2000" />
	<property name="readTimeout" value="3000" />
</bean>

<bean id="rpcService" parent="JsonrpcProxyFactory">
	<property name="interface" value="com.jsonrpc.RpcService" />
</bean>

//客户端访问服务
public static void main(String[] args) {
	ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
	RpcService service = ctx.getBean(RpcService.class);
	System.out.println(service.exec());
	service.say("JSON RPC");
	System.out.println(service.returnNull());

	ctx.registerShutdownHook();
	ctx.close();
}