springmvc返回json格式数据报406错误

一、配置springmvc

1. springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:cache="http://www.springframework.org/schema/cache"
	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/tx
			http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
			http://www.springframework.org/schema/aop
			http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
			http://www.springframework.org/schema/util
			http://www.springframework.org/schema/util/spring-util-3.0.xsd 
			http://www.springframework.org/schema/cache 
			http://www.springframework.org/schema/cache/spring-cache-3.1.xsd">
	
	<context:component-scan base-package="com"/>

</beans>

2. web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd">
	<display-name></display-name>

	<!-- DispatcherServlet -->
	<servlet>
		<servlet-name>service</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:/springmvc-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>service</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

</web-app>

3. jsp与action

<input type="button" id="btn" value="查询">

$("#btn").click(function() {
	$.ajax({
		url : '${basepath}/index/test.do',
		dataType : "json",
		type : "POST",
		async : true,
		data : {
			"id" : "wangfei"
		},
		success : function(data) {
			alert(data.msg);
		},
		error : function() {
			alert("error");
		}
	});
})

@Controller
@RequestMapping("index")
public class Index {

	 @RequestMapping("test")
	 @ResponseBody 
	 public JSONObject getAll(HttpServletRequest request){
		 JSONObject json = new JSONObject();
		 String id = request.getParameter("id");
		 json.put("msg", "json:"+id);
		 return json;
	 }
}

报错提示


二、解决返回json数据错误

在springmvc-servlet.xml配置文件中加如下代码

<!--JSON视图，需要jacksonJSON的两个jar-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
	<property name="messageConverters">
		<util:list id="beanList">
			<ref bean="mappingJacksonHttpMessageConverter" />
		</util:list>
	</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
	<property name="supportedMediaTypes" value="text/plain;charset=UTF-8" />
</bean>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>

返回结果：

注：相应的jar包没有放上去，主要有：spring相关，json相关，如有遗漏，根据报错，自行添补。