spring mvc没有返回json内容 - 错误406

时间：2010-11-01 14:45:53

标签： java jquery spring spring-mvc jackson

我正在使用Ajax Simplification Spring 3.0 article中指定的带有JSON的Spring MVC。

根据各种论坛上的建议，经过我的代码的大量尝试和变化后，我的代码仍无效。

我继续收到以下错误：（406）此请求标识的资源只能根据请求“accept”标题（）生成具有不可接受特征的响应。

我根据需要在appconfig.xml中。

应用-config.xml中

    <context:component-scan base-package="org.ajaxjavadojo" />

    <!-- Configures Spring MVC -->
    <import resource="mvc-config.xml" />

MVC-config.xml中

<mvc:annotation-driven />

<!-- Forwards requests to the "/" resource to the "index" view -->
<mvc:view-controller path="/" view-name="index"/>


<!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory -->
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="mediaTypes">
<map>
  <entry key="html" value="text/html"/>
  <entry key="json" value="application/json"/>
</map>
</property>
<property name="viewResolvers">
<list>
  <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/"/>
    <property name="suffix" value=".jsp"/>
  </bean>
</list>
</property>

</bean>

这就是我对我的控制器所拥有的

@Controller
@RequestMapping (value = "/convert")
public class ConversionController {

  @RequestMapping(method=RequestMethod.GET)
  public String getConversionForm(){
    return "convertView";
  }

  @RequestMapping(value = "/working", headers="Accept=application/json", method=RequestMethod.GET)
  public @ResponseBody Conversion getConversion(){
    Conversion d = new Conversion("d");
    return d;
  }
}

jsp jquery call 

  function convertToDecimal(){
    $.getJSON("convert/working", {key: "r"}, function(aConversion){
      alert("it worked.");
      $('#decimal').val(aConversion.input);
    });
  }

我真的很感激有关此问题的任何意见。 谢谢

14 个答案:

答案 0 :(得分：23)

要从@ResponseBody - 带注释的方法返回JSON响应，您需要做两件事：

ContentNegotiatingViewResolver中您不需要headers和@RequestMapping。

答案 1 :(得分：18)

我从3.2.x将Spring升级到4.1.x后遇到了这个问题。我通过将Jackson从1.9.x升级到2.2.x（更快的xml）

来修复 
 <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.2.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.2.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.2.3</version>
</dependency>

答案 2 :(得分：8)

尝试删除Accept的标题限制，设置断点并查看实际值。或者使用FireBug执行此操作。

另请查看this jquery issue

答案 3 :(得分：8)

将org.springframework.http.converter.json.MappingJacksonHttpMessageConverter和org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter添加到DispatcherServlet-servlet.xml。并使用

参考第二个中的第一个 
<bean id="jacksonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
        <list>
            <ref bean="jacksonMessageConverter"/>
        </list>
    </property>
</bean>

答案 4 :(得分：3)

我也遇到了这个错误，当我深入调试兔子洞时，我遇到了这个异常

  

java.lang.IllegalArgumentException：属性“error”的冲突getter定义：com.mycomp.model.OutputJsonModel＃isError（0 params）vs com.mycomp.model.OutputJsonModel＃getError（0 params）

所以基本上在我的java bean中我有类似以下内容：

private boolean isError;
private ErrorModel error;

public ErrorModel getError() {
return error;
}

public void setError(ErrorModel error) {
this.error = error;
}
public boolean isError() {
return isError;
}

public void setError(boolean isError) {
this.isError = isError;
}

将错误成员变量名之一更改为其他内容解决了问题。

答案 5 :(得分：2)

我也遇到了这个问题，您必须在配置xml中添加<mvc:annotation-driven />

和

<!-- Jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.databind-version}</version>
        </dependency>
pom.xml中的

答案 6 :(得分：2)

我使用过java配置，我也遇到了同样的错误。我错过了将@EnableWebMvc添加到配置文件中。在我的webconfig文件中添加@EnableWebMvc后，此错误得以解决。

从Spring Controller返回的Object也应该有适当的getter和setter方法。

package com.raghu.dashboard.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

import com.raghu.dashboard.dao.ITaskDAO;
import com.raghu.dashboard.dao.TaskDAOImpl;


    @Configuration
    @EnableWebMvc  //missed earlier...after adding this it works.no 406 error
    @ComponentScan(basePackages = { "com.raghu.dashboard.api", "com.raghu.dashboard.dao" })
    public class WebConfig extends AbstractAnnotationConfigDispatcherServletInitializer {

        protected Class<?>[] getRootConfigClasses() { return null;}

        protected Class<?>[] getServletConfigClasses() {
            return new Class[] { MongoConfiguration.class};
        }

        protected String[] getServletMappings() {
            return new String[]{"*.htm"}; 
        }

        @Bean(name = "taskDao")
        public ITaskDAO taskDao() {
            return new TaskDAOImpl();
        }

        @Bean
        public InternalResourceViewResolver getInternalResourceViewResolver() {
            InternalResourceViewResolver resolver = new InternalResourceViewResolver();
            resolver.setPrefix("/WEB-INF/pages/");
            resolver.setSuffix(".jsp");
            return resolver;
        }

    }

AppInitializer.java 

package com.raghu.dashboard.config;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
    public class AppInitalizer implements WebApplicationInitializer {

        @Override
        public void onStartup(ServletContext servletContext)
                throws ServletException {
            WebApplicationContext context = getContext();
            servletContext.addListener(new ContextLoaderListener(context));
            ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context));
            dispatcher.setLoadOnStartup(1);
            dispatcher.addMapping("/*");
        }

        private AnnotationConfigWebApplicationContext getContext() {
            AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
            context.register(com.raghu.dashboard.config.WebConfig.class);
            context.scan("com.raghu.dashboard.api");
            return context;
        }

    }

还要确保返回的Object具有正确的getter和setter。

示例：

@RequestMapping(value = "/list", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public ResponseEntity<TaskInfo> findAll() {
    logger.info("Calling the findAll1()");
    TaskInfo taskInfo = dashboardService.getTasks();
    HttpHeaders headers = new HttpHeaders();
    headers.add("Access-Control-Allow-Origin", "*");
    ResponseEntity<TaskInfo> entity = new ResponseEntity<TaskInfo>(taskInfo,
            headers, HttpStatus.OK);
    logger.info("entity is := " + entity);
    return entity;
}

TaskInfo对象应具有正确的getter和setter。如果没有，将抛出406错误。

POM文件供参考：

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.raghu.DashBoardService</groupId>
    <artifactId>DashBoardService</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>DashBoardService Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <!-- Spring -->
        <spring-framework.version>4.0.6.RELEASE</spring-framework.version>
        <jackson.version>2.4.0</jackson.version>
        <jaxb-api.version>2.2.11</jaxb-api.version>
        <log4j.version>1.2.17</log4j.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>2.10.1</version>
        </dependency>
        <!-- Spring Data Mongo Support -->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-mongodb</artifactId>
            <version>1.4.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>3.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>${spring-framework.version}</version>
</dependency>


<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-dao</artifactId>
    <version>2.0.3</version>
</dependency>



        <!-- Jackson mapper -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.2.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.2.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.2.3</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>1.7.1</version>
        </dependency>

        <!-- Log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
            <version>1.5.0.RELEASE</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>DashBoardService</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

答案 7 :(得分：1)

问题与jquery无关。甚至bug都说它是服务器端问题。请确保在课程路径中出现以下2个jar： -

杰克逊核-ASL-1.9.X.jar 杰克逊映射器-ASL-1.9.X.jar

答案 8 :(得分：1)

我也遇到了同样的问题，我下载了这个[jar] :( http://www.java2s.com/Code/Jar/j/Downloadjacksonall190jar.htm）！并放在lib文件夹中，该应用程序就像一个魅力:)

答案 9 :(得分：1)

使用Spring MVC查看my answer to a similar problem here解释URI的扩展并更改场景后面生成的预期MIME类型，从而生成406。

答案 10 :(得分：1)

好吧，此页面上的答案可能是正确的，但它们的解释不够理想。这就是我所做的

我将此添加到了pom.xml 

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-core-asl</artifactId>
    <version>1.9.8</version>
</dependency>
<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.8</version>  
</dependency>

然后我将标题添加到我的RequestMapping中，如下所示

@RequestMapping(value="/admin/getGallery", method = RequestMethod.GET, headers={"Content-Type=application/json"})

然后在我的jquery ajax中添加了-contentType：“ application / json”，所以看起来像

jQuery.ajax({
            type:'GET',
            url:"getGallery.html",
            data: "designId="+designId,
            processData:false,
            contentType: "application/json",
            //dataType: "json",
           success:function(data){
              console.log(data);

           },
            error : function(e) {
                console.log("ERROR: ", e);
            },
        });

然后在我的servlet中添加

<bean id="jsonHttpMessageConverter"
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
    <!-- Bind the return value of the Rest service to the ResponseBody. -->
    <bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
    <util:list id="beanList">
    <ref bean="jsonHttpMessageConverter" />
    </util:list>
    </property>
</bean>

如果您的servlet中的util标签有问题，只需添加相同的servlet文件

xmlns:util="http://www.springframework.org/schema/util"

和

xsi:schemaLocation="http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd

答案 11 :(得分：0)

正如axtavt所说，mvc：annotation-driven和jackson JSON mapper就是你所需要的。我遵循了这一点，让我的应用程序在不更改任何代码的情况下从同一方法返回JSON和XML字符串，只要在从控制器返回的对象中有@XmlRootElement和@XmlElement。区别在于请求或标头中传递的accept参数。要返回xml，浏览器的任何正常调用都会执行，否则将accept作为'application / xml'传递。如果要返回JSON，请在请求中的accept参数中使用'application / json'。

如果您使用firefox，则可以使用tamperdata并更改此参数

答案 12 :(得分：0)

而不是@RequestMapping(...headers="Accept=application/json"...)使用@RequestMapping(... , produces = "application/json")

答案 13 :(得分：0)

使用jQuery，您可以将contentType设置为所需的内容（application / json; charset = UTF-8'），并在服务器端设置相同的标头。

记住在测试时清除高速缓存。

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