Aws Lambda：如何在 Java 中實現的 lambda 函數中從 Api 網關獲取查詢參數

Question

Aws Lambda - 如何在 Java 中實現的 lambda 函數中從 Api 網關獲取查詢參數。

我有以下代碼片段：

package com.amazonaws.lambda.demo;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;

public class LambdaFunctionHandler implements RequestHandler<String, String> {

    @Override
    public String handleRequest(String input, Context context) {
        context.getLogger().log("Input: " + input);

        // TODO: implement your handler
        return "Hello from " + input;
    }
}

如果上述 handleRequest 函數中有任何查詢參數，我如何訪問查詢參數。

Answer 1

在pom.xml 中確保在此處指定“ 2.2.5 ”或更新版本

<dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-events</artifactId> <version>2.2.5</version> </dependency>

你的 java lambda 類：

import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyRequestEvent;
import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyResponseEvent;

public class LambdaFunctionHandler
    implements RequestHandler<APIGatewayProxyRequestEvent, APIGatewayProxyResponseEvent> {
    @Override
    public APIGatewayProxyResponseEvent handleRequest(APIGatewayProxyRequestEvent input,
            Context context) {
        Map<String, String> inputParams = input.getPathParameters();

        APIGatewayProxyResponseEvent responseEvent = new APIGatewayProxyResponseEvent();
        responseEvent.setBody("body text");
        responseEvent.setStatusCode(200);
        return responseEvent;
    }
}

Answer 2

您可以嘗試在 API Gateway 的集成請求正文映射模板中映射您想要的所有內容。 一旦您構建了主體映射模板，那么在 lambda 的上下文中您將獲得您構建的 excat json。

請找到以下鏈接，我已經為類似問題提供了解決方案，

https://stackoverflow.com/a/46407780/7666972

Answer 3

根據上面 tgk23 的回答，我相信您正在尋找查詢參數，而不是路徑參數：

public class LambdaFunctionHandler
        implements RequestHandler<APIGatewayProxyRequestEvent, APIGatewayProxyResponseEvent> {
    @Override
    public APIGatewayProxyResponseEvent handleRequest(APIGatewayProxyRequestEvent input, Context context) {
        Map<String, String> inputParams = input.getQueryStringParameters();
        for (Map.Entry<String, String> entry : inputParams.entrySet()) {
            LOGGER.info("param: " + entry.getKey() + "=" + entry.getValue());
        }

        APIGatewayProxyResponseEvent responseEvent = new APIGatewayProxyResponseEvent();
        responseEvent.setBody("body text");
        responseEvent.setStatusCode(200);
        return responseEvent;
    }
}