pom.xml

<properties>
		<commons-lang.version>2.6</commons-lang.version>
		<slf4j.version>1.7.6</slf4j.version>
		<spring.version>4.1.3.RELEASE</spring.version>
        <jackson.version>2.5.4</jackson.version>
	</properties>

<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>${jackson.version}</version>
		</dependency>

mvc-dispatcher-servlet.xml配置ViewResolver

<!-- 配置ViewResolver。 可以用多个ViewResolver。 使用order属性排序。 InternalResourceViewResolver放在最后。 -->
	<bean
		class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		<property name="order" value="1" />
		<property name="mediaTypes">
			<map>
				<entry key="json" value="application/json" />
				<entry key="xml" value="application/xml" />
				<entry key="htm" value="text/html" />
			</map>
		</property>

		<property name="defaultViews">
			<list>
				<!-- JSON View -->
				<bean
					class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
				</bean>
			</list>
		</property>
		<property name="ignoreAcceptHeader" value="true" />
	</bean>

controller返回的是course,使用了@ResponseBody注解

//访问123,courseId=123
@RequestMapping(value="/{courseId}",method=RequestMethod.GET)
	public @ResponseBody Course getCourseInJson(@PathVariable Integer courseId){
		return  courseService.getCoursebyId(courseId);
	}

结果,浏览器如何看待返回的数据Course

复制到Notepad++,用Notepad++的Json插件查看

解析得出,是一个对象

##################################################

不使用@ResponseBody注解,使用ResponseEntity

import org.springframework.http.ResponseEntity;
	@RequestMapping(value="/jsontype/{courseId}",method=RequestMethod.GET)
	public  ResponseEntity<Course> getCourseInJson2(@PathVariable Integer courseId){
		Course course =   courseService.getCoursebyId(courseId);		
		return new ResponseEntity<Course>(course, HttpStatus.OK);
	}