HttpRequestHandlingMessagingGateway PayloadExpression java 配置

Question

我想使用 HttpRequestHandlingMessagingGateway::setPayloadExpression 将请求值映射到我的模型对象。我找到 this answer，但没能用 java 配置做同样的事情。如果有人能提供一个例子，那就太好了。

我的代码：

    @Bean
    public HttpRequestHandlingMessagingGateway httpViewGate() {
        HttpRequestHandlingMessagingGateway gateway = new HttpRequestHandlingMessagingGateway(true);
        RequestMapping requestMapping = new RequestMapping();
        requestMapping.setMethods(HttpMethod.GET);
        requestMapping.setPathPatterns("/foo");
        requestMapping.setProduces(MediaType.APPLICATION_JSON_VALUE);
        gateway.setRequestMapping(requestMapping);
        gateway.setRequestChannel(intConfig.viewFlowRequestChannel());
        gateway.setPayloadExpression(???); //what to do here
        gateway.setRequestPayloadType(ViewClientCriteria.class);// this may not be required
        return gateway;
    }

另外，如果有另一种更灵活的方法来做同样的事情，我也很感兴趣。

我使用Spring Boot 1.2.4

Answer 1

Expression payloadExpression = new SpelExpressionParser().parseExpression("...");
gateway.setPayloadExpression(payloadExpression);

HttpRequestHandlingMessagingGateway PayloadExpression java 配置

HttpRequestHandlingMessagingGateway PayloadExpression java config

java

dsl

spring

spring-integration

spring-boot