spring mvc @ResponseBody http报错406

项目使用的是spring mvc 3.2.4 ,在使用到@ResponseBody 的时候出现http 406的错误,解决方法：

在pom.xml中添加上一下代码就ok了。

		<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>

        @RequestMapping("/findCitys")
	public @ResponseBody List<City> findCitys(){
		return cityService.queryAllList();
	}

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