泽西岛异常：未找到 Java 类和 MIME 媒体类型 application/x-www-form-urlencoded 的消息正文阅读器

【问题标题】：Jersey Exception : A message body reader for Java class and MIME media type application/x-www-form-urlencoded was not found泽西岛异常：未找到 Java 类和 MIME 媒体类型 application/x-www-form-urlencoded 的消息正文阅读器
【发布时间】：2016-04-03 09:48:54
【问题描述】：

我有一个基于 Jersey 的 Rest WS，它输出 JSON。我正在实现一个 HttpClient 来调用 WS 并使用 JSON 响应。我的客户端代码如下

public static String sendPostRequest(String url, String accept,
        String authorization, Map<String, String> body)
        throws UnsupportedOperationException, IOException {

    HttpClient client = HttpClientBuilder.create().build();
    HttpPost post = new HttpPost(url);
    if (authorization != null && !authorization.equals("")) {
        post.setHeader("Authorization", "Bearer " + authorization);
        // post.setHeader("access_token", authorization);
    }

    List<NameValuePair> urlParameters = new ArrayList<NameValuePair>();
    for (Map.Entry<String, String> map : body.entrySet()) {
        String key = map.getKey();
        String value = map.getValue();
        urlParameters.add(new BasicNameValuePair(key, value));
    }

    UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(
            urlParameters);
    post.setEntity(urlEncodedFormEntity);

    HttpResponse response = client.execute(post);
    System.out.println("Response Code : "
            + response.getStatusLine().getStatusCode());
    String json = EntityUtils.toString(response.getEntity());
    System.out.println("JSON : " + json);
    return json;
}

我将访问令牌作为标头发送。如果我对此curl -X POST http://192.168.33.70:8080/management/orgs/org1/apps?access_token=YWMtXh3LwK4XEeWaSPc_E_-PwQAAAVIRV758KgNhJ-y3wNNAx5MLSmwTQvi1OPg -d '{"name":"app1"}' 使用 curl 命令，我会得到正确的响应，但是通过HttpClient 我得到以下异常堆栈跟踪：

2015-12-29 12:49:18 ERROR          rest.exceptions.AbstractExceptionMapper.toResponse(72)<http-bio-8080-exec-5>- javax.ws.rs.WebApplicationException Server Error (500)
javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body reader for Java class java.util.Map, and Java type java.util.Map<java.lang.String, java.lang.Object>, and MIME media type application/x-www-form-urlencoded was not found.

    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:477)
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123)
    at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:86)
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153)
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:183)
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
    at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:927)
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:875)
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:829)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
    at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.usergrid.rest.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:92)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: com.sun.jersey.api.MessageException: A message body reader for Java class java.util.Map, and Java type java.util.Map<java.lang.String, java.lang.Object>, and MIME media type application/x-www-form-urlencoded was not found.

我的请求中有正确​​的 MIME 类型。我的 POJO 已经用 XMLRootElement 进行了注释。任何帮助将不胜感激。

【问题讨论】：

  • 您意识到在您的 cURL 请求中，默认内容类型是 application/x-www-form-urlencoded，但您尝试发送的数据是 JSON 格式。我不明白这怎么可能奏效。显示您的资源方法。
  • 它适用于所有其他不需要访问令牌的请求，我已经声明了“@Produces( { MediaType.APPLICATION_JSON, "application/javascript", "application/x-javascript", "text/ecmascript", "application/ecmascript", "text/jscript" } )" 在我的休息控制器中。
  • 读取请求实体的错误。 @Produces 与此无关。 @Consumes 用于请求实体类型。发布您的服务器代码以获得更多帮助。
  • 好的，我检查了 HttpClient api 没有直接的方法来发送内容类型。那么如何摆脱这个东西呢？
  • 如何在 HttpClient 中发送内容类型，您知道吗？

标签： java json rest jersey apache-httpclient-4.x


【解决方案1】： 
    Caused by: com.sun.jersey.api.MessageException: A message body reader for Java class java.util.Map, and Java type java.util.Map<java.lang.String, java.lang.Object>, and MIME media type application/x-www-form-urlencoded was not found.

由于异常消息表明您正在尝试将数据类型编组/解组映射到 JSON，这在 Jersey 中默认不支持，因为对象的编组/解组由不支持映射的 JAXB 处理。然而，谷歌可以用 GSON 覆盖实现以注册 MessageBodyReader/Writer。可以在 here 找到将 GSON 与 Jersey 结合使用的简单实现。除此之外，互联网上还有许多带有 Jersey 的 GSON 实现。

我比较感兴趣的是UrlEncodedFormEntity类的代码。请发布它以获得更多见解。

【讨论】：

    猜你喜欢
    • 2014-03-20
    • 2012-01-25
    • 2016-06-14
    • 2012-11-06
    • 2013-12-15
    • 2012-08-16
    • 2016-10-01
    • 2018-01-26
    相关资源
    最近更新 更多
    热门标签
    Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode