spring integration中向rest服务发送string对象的ConverterNotFoundException

Question

我试图通过http:output-gateway从spring-integration向REST服务发送一个JSON字符串。

但是得到错误

找不到能够从java.lang.String类型转换为org.springframework.http.ResponseEntity<？>类型的转换器

分享有关详情

<int-http:outbound-gateway id="xtifygateway"
        request-channel="requestchannel" request-factory="requestFactory" 
        url="${xtifyUrl}" http-method="POST">
</int-http:outbound-gateway>

<int:header-enricher input-channel="requestchannel">
    <int:header name="Content-Type" value="application/json"/>
</int:header-enricher>

public interface RequestGateway
{
    ResponseEntity<?> pushNotification(String xtifyRequest);
}

  ObjectMapper objectMapper = new ObjectMapper(); 
  try { 
      String xtifyJson = objectMapper.writeValueAsString(xtifyRequest); 
  } 

有人能帮忙吗？我在这里漏掉了什么？

Answer 1

我想你在找这个：

     <xsd:attribute name="expected-response-type" type="xsd:string">
        <xsd:annotation>
            <xsd:documentation>
                The expected type to which the response body should be converted.
                Default is 'org.springframework.http.ResponseEntity'.
                This attribute cannot be provided if expected-response-type-expression has a value
            </xsd:documentation>
            <xsd:appinfo>
                <tool:annotation kind="direct">
                    <tool:expected-type type="java.lang.Class" />
                </tool:annotation>
            </xsd:appinfo>
        </xsd:annotation>
    </xsd:attribute>

从一个方面来说，字符串应该足够了，但从另一个方面来说，考虑使用一些您的域对象。MappingJackson2HttpMessageConverter将在这方面为您服务。