Spring REST服务抛出“ 406不可接受”：org.springframework.web.HttpMediaTypeNotAcceptableException：找不到可接受的表示形式

时间：2019-03-28 08:26:40

标签： java spring rest

我正在尝试使用Spring创建一个简单的REST服务。基本查询中发生错误： HTTP 406不可接受：org.springframework.web.HttpMediaTypeNotAcceptableException：找不到可接受的表示形式

我有一个简单的控制器：

package com.test.my.rest;

import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "/sample", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public class SampleRestController {

    @GetMapping(value = "/test_string")
    public String getString() {
        return "Hello";
    }

    @GetMapping(value = "/test_string_wrap")
    public ResponseEntity<String> getEntityString() {
        return ResponseEntity.ok("Hello");
    }

    @GetMapping(value = "/test_int")
    public Integer getInt() {
        return 1;
    }

    @GetMapping(value = "/test_int_wrap")
    public ResponseEntity<Integer> getInteger() {
        return ResponseEntity.ok(new Integer(2));
    }

    @GetMapping(value = "/test_item")
    public ResponseEntity<List<Item>> getItems() {
        List<Item> list = new ArrayList();
        list.add(new Item(1, "Item1"));
        list.add(new Item(2, "Item2"));
        return ResponseEntity.ok(list);
    }
}

我尝试使用浏览器和curl工具调用服务：

curl -X GET --header "Accept: application/json" http://localhost:8070/rest/sample/test_int -v

或

http://localhost:8070/rest/sample/test_int

但是所有方法（../test_string和../test_string_wrap除外）都会引发此HTTP 406错误，甚至是基本的http://localhost:8070/rest/sample/test_int：

[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'] TRACE org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod ServletInvocableHandlerMethod.java:124 - Error handling return value=[1], type=java.lang.Integer in public java.lang.Integer com.test.my.rest.SampleRestController.getInt()
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:306) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:180) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:119) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) [javax.servlet.javax.servlet-api.jar:3.1.0]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet.javax.servlet-api.jar:3.1.0]

我的配置 web.xml ：

<?xml version="1.0" encoding="UTF-8" ?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <context-param>
        <param-name>contextClass</param-name>
        <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>com.test.my.config.SpringContextConfig</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextClass</param-name>
            <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
        </init-param>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>com.test.my.config.SpringDispatcherConfig</param-value>
        </init-param>
        <load-on-startup>99</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>

</web-app>

配置 SpringDispatcherConfig ：

@Configuration
@ComponentScan(basePackages = {"com.test.my.rest"})
public class SpringDispatcherConfig {
}

配置 pom.xml ：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
...
  <properties>
        <spring.version>5.1.3.RELEASE</spring.version>
        <jackson.version>2.9.8</jackson.version>
        <jxls.version>2.5.1</jxls.version>
        <jxls-poi.version>1.1.0</jxls-poi.version>
    </properties>
...
 <dependencies>
...
   <dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>
...
     </dependencies>
</project>

weblogic 12.2.1的配置 weblogic.xml ：

<?xml version = '1.0' encoding = 'windows-1252'?>
<weblogic-web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                                    xsi:schemaLocation="http://www.bea.com/ns/weblogic/weblogic-web-app.xsd"
                                    xmlns="http://www.bea.com/ns/weblogic/weblogic-web-app">

    <context-root>/</context-root>
    <container-descriptor>
        <prefer-web-inf-classes>false</prefer-web-inf-classes>
        <prefer-application-packages>
            <package-name>org.slf4j.*</package-name>
            <package-name>org.springframework.*</package-name>
            <package-name>com.fasterxml.*</package-name>
        </prefer-application-packages>
    </container-descriptor>
</weblogic-web-app>

请帮助了解错误之处：（

2 个答案:

答案 0 :(得分：0)

经过数千次尝试，数小时的尝试和错误，我找到了解决问题的方法。

在List>转换器中，Jackson转换器没有被拉到AbstractMessageConverterMethodProcessor构造函数中。

因为...应该在SpringDispatcherConfig /

处添加了@EnableWebMvc注释 
@Configuration
@EnableWebMvc  // solve the problem
@ComponentScan(basePackages = {"com.bpcbt.iplan.rest"})
public class SpringDispatcherConfig {
}

答案 1 :(得分：-1)

尝试为所有API请求设置标头的接受类型。目前，我正在设置“ 本地”（仅针对您的一个API），但是您可以将其设置为“ 全局”。

@GetMapping(value = "/test_int_wrap")
public ResponseEntity<Integer> getInteger() {
    HttpHeaders responseHeaders = new HttpHeaders();
    responseHeaders(Collections.singletonList(MediaType.APPLICATION_JSON_UTF8_VALUE)); try setting this media type.

    return ResponseEntity
          .ok(new Integer(2))
          .headers(responseHeaders);
}
相关问题
最新问题