Spring MVC & JSON--406 不可接受的@Responsebody

Question

我想在控制器中使用@ResponseBody生成一个json对象。但我在浏览器端得到的是：状态406"此请求标识的资源只能根据请求的"接受"标头生成具有不可接受特性的响应。">

以下是pom.xml文件：

<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.anand</groupId>
<artifactId>AnandWebStore</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>AnandWebStore Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.0.3.RELEASE</spring.version>
<hibernate.core>4.2.7.Final</hibernate.core>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>  

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.0.2.GA</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.6</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.core}</version>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4-2.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.webflow</groupId>
<artifactId>spring-js-resources</artifactId>
<version>2.4.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.7.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.7.4</version>
</dependency>

</dependencies>
<build>
<finalName>AnandWebStore</finalName>
</build>
</project>

我用过CCD_ 1&1.7.4版本的jackson-mapper-asl。

下面是jsp中的一段代码，它将数据发布到控制器。

<form:form class="well form-horizontal" action="saveCustomer.html" method="post"  id="contact_form" commandName="customer">
<fieldset>
<div class="form-group">
<label class="col-md-4 control-label">First Name</label>  
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<form:input  path="first_name" name="first_name" placeholder="First Name" class="form-control"  type="text" />
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" >Last Name</label> 
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<form:input path ="last_name" name="last_name" placeholder="Last Name" class="form-control"  type="text" />
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label">E-Mail</label>  
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-envelope"></i></span>
<form:input path="email" name="email" placeholder="E-Mail Address" class="form-control"  type="text" />
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label">Phone #</label>  
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-earphone"></i></span>
<form:input path ="phone" name="phone" placeholder="[phone]" class="form-control" type="text"/>
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label">Address</label>  
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-home"></i></span>
<form:input path="address" name="address" placeholder="Address" class="form-control" type="text"/>
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label">City</label>  
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-home"></i></span>
<form:input path="city" name="city" placeholder="city" class="form-control"  type="text"/>
</div>
</div>
</div>
<div class="form-group"> 
<label class="col-md-4 control-label">State</label>
<div class="col-md-4 selectContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-list"></i></span>
<form:select path="state" name="state" class="form-control selectpicker">
<option value=" " >Please select your state</option>
<option>......</option>
</form:select>
</div>
</div>
</div>
<div class="alert alert-success" role="alert" id="success_message">Success <i class="glyphicon glyphicon-thumbs-up"></i> Customer Added Successfully...</div>
<div class="form-group">
<label class="col-md-4 control-label"></label>
<div class="col-md-4">
<button type="submit" class="btn btn-warning" >Add <span class="glyphicon glyphicon-send"></span></button>
</div>
</div>
</fieldset>
</form:form>

下面是调度器servlet的代码：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
">
<mvc:annotation-driven/>
<mvc:resources location="/resources/" mapping="/resources/**" />
<context:component-scan base-package="com.anand" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/views/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="/WEB-INF/messages" />
</bean>
</beans>

我在这里使用了<mvc:annotation-driven/>。

以下是控制器的代码：

package com.anand.controllers;
import java.util.HashMap;
import java.util.Map;
import javax.validation.Valid;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.anand.forms.CustomerForm;
import com.anand.forms.LoginForm;
import com.anand.model.Customer;
import com.anand.services.CustomerService;
@Controller
public class CustomerController {
private static final Logger logger = LoggerFactory.getLogger(CustomerController.class);
@Autowired
private CustomerService customerService;
@RequestMapping(value="saveCustomer.html",method=RequestMethod.POST)
private @ResponseBody Map<String, Object>saveCustomer(@Valid Customer customer, BindingResult result)
{
if(result.hasErrors())
{
}
boolean saveFlag = customerService.save(customer);
Map<String, Object> map = new HashMap<String, Object>();
if(saveFlag==true)
{
map.put("status", 200);
map.put("Message", "Data for customer saved successfully");
}
else
{
map.put("status", 500);
map.put("Message", "Error occured at server side");
}
return map;
}
}

注意：在这里，我可以看到UI中发布的数据被存储在DB中，我也可以看到eclipse控制台中为其执行的hibernate查询，但在UI端，我得到了错误406。我分析了brwoser的网络部分，发现了以下信息：

请求标头：

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:126
Content-Type:application/x-www-form-urlencoded
Cookie:JSESSIONID=A343E5E9FBF5866A12CEC2703DD5A5AE
Host:localhost:8080
Origin:http://localhost:8080
Referer:http://localhost:8080/AnandWebStore/forms/loginform.html
Upgrade-Insecure-Requests:1
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36

从stackoverflow中几个问题的答案中，我知道问题出在下面一行，这个标题应该像application/json:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

是的，那很好。但是如何解决这个问题呢？？

Answer 1

这有点令人困惑-您想发送HTML表单POST请求并获得JSON作为响应吗？我真的建议您决定是使用表单和HTML响应来处理整个请求，还是使用JSON。它将更加清晰和用户友好

但如果您真的想使用表单并生成JSON(这对我来说没有意义)，请使用javascript中的XMLHttpRequest发送表单，或者使用其他JS库，如jQuery，并使用application/json添加头。无法使用HTML表单发送JSON请求。此处列出了接受的类型

我建议使用并生成HTML，或者生成并使用JSON。如果您决定使用JSON，请记住在控制器参数附近添加@RequestBody注释。所以它看起来像

@RequestMapping(value="saveCustomer.html",method=RequestMethod.POST)
private @ResponseBody Map<String, Object>saveCustomer(@Valid @ReqyuestBody Customer customer, BindingResult result)
{ ....

希望它能帮助

Answer 2

如果你想返回json对象，你需要从你的控制器返回一个ResponseEntity:

return new ResponseEntity<Map<String, String>>(map, HttpStatus.OK);

Answer 3

试试这样的

@RequestMapping(value = "saveCustomer.html",
method = RequestMethod.POST,
consumes= { "application/json" },
produces = { "application/json" })
public ResponseEntity<String> saveCustomer(@Valid Customer customer, BindingResult result) {
// your business logic here
if(saveFlag==true) {
return new ResponseEntity<String>("Data for customer saved successfully", HttpStatus.OK);   
}
else {
return new ResponseEntity<String>("Error occured at server side", HttpStatus.INTERNAL_SERVER_ERROR);            
}
}

Answer 4

当您在Submit上执行HTMLForm POST时，您需要如下定义jackson-core-asl0属性，

<form enctype='application/json'>

这将允许您的用户代理处理json响应。

Answer 5

终于可以工作了。首先，我也改变了做法。现在，我不再使用表单提交，而是使用Ajax调用，如下所示：

$('#AddCustButton').click(function(){
var firstName = $('#first_name').val();
var lastName = $('#last_name').val();
var email = $('#email').val();
var phone = $('#phone').val();
var address = $('#address').val();
var city = $('#city').val();
var state = $('#state').val();

$.ajax({
url:'saveCustomer',
type:'POST',
dataType:'json',
data:{'first_name':firstName,'last_name':lastName,'email':email,'phone':phone,'address':address,'city':city,'state':state},
success:function(response){
if(response.status=='Success'){
$('#success_message').slideDown({ opacity: "show" }, "slow"); // Do something ...
$('#contact_form').data('bootstrapValidator').resetForm();
}
}
});
});

然后检查了响应，但得到了相同的错误，状态代码为406。然后，我从@Walfrat的评论(见问题下方的评论)和"Paul grime"对此问题的回答中得到了将Codehus Jackson库更改为FasterXml Jackson的线索问题

在从codehaus Jackson更改为fasterXML Jackson之后，它开始工作了。