fix:修改字符串检验方法

jetlinks-components/network-component/http-component/src/main/java/org/jetlinks/pro/network/http/executor/HttpClientTaskExecutorProvider.java

@@ -1,6 +1,7 @@
 package org.jetlinks.pro.network.http.executor;
 
 import lombok.AllArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
 import org.hswebframework.web.bean.FastBeanCopier;
 import org.jetlinks.core.message.codec.http.HttpRequestMessage;
 import org.jetlinks.core.message.codec.http.HttpResponseMessage;
@@ -17,7 +18,6 @@ import org.jetlinks.rule.engine.defaults.LambdaTaskExecutor;
 import org.reactivestreams.Publisher;
 import org.springframework.http.MediaType;
 import org.springframework.stereotype.Component;
-import org.springframework.util.StringUtils;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
@@ -59,7 +59,7 @@ public class HttpClientTaskExecutorProvider implements TaskExecutorProvider {
         defaultHttpRequestMessage.setHeaders(Collections.emptyList());
         defaultHttpRequestMessage.setUrl(config.getUri());
         defaultHttpRequestMessage.setMethod(config.getHttpMethod());
-        if (!StringUtils.isEmpty(config.getContentType())) {
+        if (!StringUtils.isBlank(config.getContentType())) {
             defaultHttpRequestMessage.setContentType(MediaType.valueOf(config.getContentType()));
         }
         return new HttpRequestMessageWrapper(message, defaultHttpRequestMessage);