在springmvc中使用对象转换器MappingJackson2HttpMessageConverter将数据转为Json格式返回

1.POM添加依赖：

    com.fasterxml.jackson.core
    jackson-annotations
    2.5.4
    

    com.fasterxml.jackson.core
    jackson-core
    2.5.4


	  com.fasterxml.jackson.core
	  jackson-databind
	  2.5.4

2.在springmvc配置文件中添加

            
                
                    
                        application/json;charset=UTF-8
                    
                
            
        
    

3.在方法上添加 @ResponseBody标签

@RequestMapping(value = "age.do", method = RequestMethod.POST)
@ResponseBody
public Men getAge(String username)
{
    Men men = iUserService.getAgebyName(username);
    return men;
}