Java HttpMediaTypeNotAcceptableException：找不到可接受的表示 spring mvc 4.1.5 with com.fasterxml 2.5.1
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HttpMediaTypeNotAcceptableException: Could not find acceptable representation spring mvc 4.1.5 with com.fasterxml 2.5.1
提问by 000
Help - what else can I do to fix this error? org.springframework.web.HttpMediaTypeNotAcceptableException:: Could not find acceptable representation.
帮助 - 我还能做些什么来修复这个错误？org.springframework.web.HttpMediaTypeNotAcceptableException:: 找不到可接受的表示。
I think my project is configured properly to handle json restful requests. In the past several days, I have read and applied various suggestions to no avail. Are there any more ideas on what else I should be doing differently?
我认为我的项目配置正确，可以处理 json restful 请求。在过去的几天里，我阅读并应用了各种建议，但无济于事。还有什么我应该做的不同的想法吗？
I am using Spring MVC 4.1.5 and com.fasterxml 2.5.1.
我正在使用 Spring MVC 4.1.5 和 com.fasterxml 2.5.1。
A portion of my pom.xml
我的 pom.xml 的一部分
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-annotations</artifactId>
<version>2.5.1</version>
<type>bundle</type>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-core</artifactId>
<version>2.5.1</version>
<type>bundle</type>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-databind</artifactId>
<version>2.5.1</version>
<type>bundle</type>
</dependency>
Here is my part of my web.xml
这是我的 web.xml 的一部分
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring/appServlet/servlet-context.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Here is part of my servlet-context.xml
这是我的 servlet-context.xml 的一部分
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="com.losgatos">
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
Here is my controller
这是我的控制器
package com.losgatos.controllers;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.losgatos.User;
@RestController
@RequestMapping( "user" )
public class UserController {
@RequestMapping( value = "data", produces="application/json" )
public User getUser(){
return new User();
}
}
Here is the User User POJO
这是用户用户 POJO
package com.losgatos;
import java.util.EnumSet;
public class User {
public User(){
id = 0;
age = 22;
name = "Titus Feng";
alias = "tornado tie";
roles = EnumSet.of( Role.NORMAL, Role.NEW );
}
private int id, age;
private String name, alias;
private EnumSet<Role> roles;
//added getters and setters here
public enum Role{
NEW, NORMAL, ADMIN, MEMBER, DORMANT
}
}
采纳答案by 000
I have gotten it to work finally by:
removing <type>bundle</type>from my fasterxml.Hymanson pom.xml entries
rerunning my pom.xml file
cleaning the project build (project -> clean)
cleaning and restarting the server
我终于通过以下方式让它工作了：从我的fasterxml.Hymanson pom.xml条目中
删除
重新运行我的pom.xml文件
清理项目构建（项目->清理）
清理并重新启动服务器<type>bundle</type>
回答by Abhishek Nayak
In your spring context configuration file(dispatcher-servlet.xml) you have:
在您的 spring 上下文配置文件（dispatcher-servlet.xml）中，您有：
<context:component-scan base-package="com.losgatos">
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
and your controller is annotated with:
并且您的控制器注释为：
@RestController
@RequestMapping( "user" )
public class UserController {
...
}
your controller class will not be loaded to container at all. BTW as per your exception message:
您的控制器类根本不会加载到容器中。顺便说一句，根据您的异常消息：
I am getting the error
org.springframework.web.HttpMediaTypeNotAcceptableException:: Could not find acceptable representation.
我收到错误
org.springframework.web.HttpMediaTypeNotAcceptableException:: 找不到可接受的表示。
This exception raises when you have not registered the following in context file:
当您尚未在上下文文件中注册以下内容时，会引发此异常：
<mvc:annotation-driven />(you have not registered on your context file)- If required JAR's are not present on classpath, (you already have it)
- When ENUM is used, annotate your ENUM class with
@JsonFormat(shape= JsonFormat.Shape.OBJECT)
<mvc:annotation-driven />（您尚未在上下文文件中注册）- 如果所需的 JAR 不在类路径中，（您已经有了）
- 使用 ENUM 时，用
@JsonFormat(shape= JsonFormat.Shape.OBJECT)
EDIT: tested working fine for me, with Spring 4.0.1.RELEASE and below single JSON dependency:
编辑：测试对我来说工作正常，使用 Spring 4.0.1.RELEASE 和以下单个 JSON 依赖项：
com.fasterxml.Hymanson.core Hymanson-databind 2.4.3
com.fasterxml.Hymanson.core Hyman逊数据绑定 2.4.3
and controller class:
和控制器类：
@RestController
@RequestMapping("/u")
public class UserRestController {
@RequestMapping( value = "/data", produces="application/json" )
public RestUser getUser(){
return new RestUser();
}
}
got:
得到了：
{"id":0,"age":22,"name":"Titus Feng","alias":"tornado tie","roles":["NEW","NORMAL"]}
Suggestion, change this:
建议，改成这样：
<context:component-scan base-package="com.losgatos">
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
to:
到：
<context:component-scan base-package="com.losgatos">
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController" />
</context:component-scan>
回答by Brian Clozel
Spring Framework 4.1 raised some dependencies requirements; you need to upgrade Hymanson to version 2.3 or later. Note that the artifact groupId changed to com.fasterxml.
Spring Framework 4.1 提出了一些依赖需求；您需要将 Hymanson 升级到 2.3 或更高版本。请注意，工件 groupId 更改为com.fasterxml.
