为具有多个键的JSON对象创建hamcrest断言的最有效方法是什么？

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasEntry;
import com.google.gson.Gson;

public class JsonAssertionExample {
    public static void main(String[] args) {
        // 假设我们有一个JSON对象
        String json = "{\"key1\": \"value1\", \"key2\": \"value2\", \"key3\": \"value3\"}";

        // 将JSON对象转换为Map对象
        Gson gson = new Gson();
        java.lang.reflect.Type type = new com.google.gson.reflect.TypeToken<Map<String, String>>(){}.getType();
        Map<String, String> jsonMap = gson.fromJson(json, type);

        // 使用hamcrest断言检查JSON对象是否包含指定的键值对
        assertThat(jsonMap, hasEntry("key1", "value1"));
        assertThat(jsonMap, hasEntry("key2", "value2"));
        assertThat(jsonMap, hasEntry("key3", "value3"));
    }
}