如何在java上使用json rpc和curl

<dependency>
    <groupId>com.googlecode.jsonrpc4j</groupId>
    <artifactId>jsonrpc4j</artifactId>
    <version>1.2.0</version>
</dependency>

import com.googlecode.jsonrpc4j.JsonRpcHttpClient;

// 创建JSON-RPC客户端
JsonRpcHttpClient client = new JsonRpcHttpClient(new URL("http://example.com/jsonrpc"));

// 发送JSON-RPC请求
Object result = client.invoke("methodName", new Object[]{param1, param2}, Object.class);

// 处理响应结果
// ...

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

// 构建cURL命令
String[] command = {"curl", "-X", "POST", "-H", "Content-Type: application/json", "-d", "{\"param1\":\"value1\",\"param2\":\"value2\"}", "http://example.com/api"};

// 执行cURL命令
ProcessBuilder processBuilder = new ProcessBuilder(command);
Process process = processBuilder.start();

// 获取命令输出
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
    response.append(line);
}

// 处理响应结果
// ...