【发布时间】：2015-06-26 13:48:18
【问题描述】：
我正在使用托管在 Google App Engine 上的 Java、Jetty 和 Jersey 2.18（目前是最新版本）。
假设我有这样的服务
@GET
@Produces(MediaType.APPLICATION_JSON)
@Path("/{userId}")
public Response getUser(@PathParam("userId") String userId)
{
...
}
当我这样做时：
return Response.ok()
.entity(user)
.build();
我正确收到了应用程序/json 内容类型和正文。 但是当我这样做时：
return Response
.status(404)
.entity(new ResponseModel(100, "user not found"))
.build();
与返回任何 4XX 或 5XX 状态相同，我会收到一个 text/html 内容类型以及此 HTML 正文：
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>404 Not Found</title>
</head>
<body text=#000000 bgcolor=#ffffff>
<h1>Error: Not Found</h1>
</body>
</html>
而不是我放在 .entity() 中的对象
编辑：这是我的 web.xml
<?xml version="1.0" encoding="utf-8"?>
<web-app
version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.mypackage.services;org.codehaus.jackson.jaxrs</param-value>
</init-param>
<init-param>
<param-name>jersey.config.server.provider.classnames</param-name>
<param-value>
org.glassfish.jersey.server.gae.GaeFeature;
org.glassfish.jersey.server.mvc.jsp.JspMvcFeature;
org.glassfish.jersey.media.multipart.MultiPartFeature;
</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.config.feature.Trace</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/rest/*</url-pattytern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>home.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>ObjectifyFilter</filter-name>
<filter-class>com.googlecode.objectify.ObjectifyFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>ObjectifyFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring Security Filter -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml </param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>GlobalResponseFilter</filter-name>
<filter-class>com.mypackage.GlobalResponseFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>GlobalResponseFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<security-constraint>
<web-resource-collection>
<web-resource-name>everything</web-resource-name>
<url-pattern>/*</url-pattern>
</web-resource-collection>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
<!-- ** -->
<!-- ** General session timeout in minutes -->
<!-- ** -->
<session-config>
<session-timeout>1440</session-timeout>
</session-config>
</web-app>
ResponseModel 只是一个基本的可序列化 java 类：
import java.io.Serializable;
public class ResponseModel implements Serializable
{
private static final long serialVersionUID = 1L;
private int code;
private Serializable data;
public ResponseModel()
{
}
public ResponseModel(int code, Serializable data)
{
System.err.println("Code " + code + " : " + data);
this.code = code;
this.data = data;
}
public int getCode()
{
return code;
}
public void setCode(int code)
{
this.code = code;
}
public Serializable getData()
{
return data;
}
public void setData(Serializable data)
{
this.data = data;
}
}
【问题讨论】：
-
在我看来不像是重复的。另一个问题是“如何完全出错”，这是“出错后如何控制 MIME 类型”，其他答案未涵盖。
-
正是@o11c 谢谢
-
通常当Java服务器返回这样的错误时，意味着该URL未被识别。您确定该请求来自您的代码（getUser 方法）并被执行吗？
-
@KamenStoykov 是的，调用通过我的方法并且我的代码被执行（我实际上可以在谷歌应用引擎日志中看到日志和错误日志）
-
也许您的 Jetty 已配置为具有自定义错误页面？检查您的 ${jetty.home)/contexts 目录。 wiki.eclipse.org/Jetty/Howto/Custom_Error_Pages
标签： java google-app-engine jersey jersey-2.0