public String list(HttpServletRequest request,HttpServletResponse response)

HttpServletRequest request =((ServletRequestAttributes)
RequestContextHolder.getRequestAttributes()).getRequest();

@ModelAttribute 
private void initServlet(HttpServletRequest request,HttpServletResponse response) { 
 //String p=request.getParameter("p"); 
 //this.req=request;//实例变量，有线程安全问题，可以使用ThreadLocal模式保存 
} 

public boolean doAdd(Demo demo)

@RequestMapping("/json1") 
@ResponseBody 
public Demo json1() { 
 Demo demo=new Demo(); 
 demo.setBirthday(new Date()); 
 demo.setCreateTime(new Date()); 
 demo.setHeight(170); 
 demo.setName("tomcat"); 
 demo.setRemark("json测试"); 
 demo.setStatus((short)1); 
 return demo; 
} 

@RequestMapping("/json2") 
public void json2() { 
 Demo demo=new Demo(); 
 demo.setBirthday(new Date()); 
 demo.setCreateTime(new Date()); 
 demo.setHeight(170); 
 demo.setName("tomcat"); 
 demo.setRemark("json测试"); 
 demo.setStatus((short)1); 
 String json=JsonUtil.toJson(obj);//;json处理工具类 
 HttpServletResponse response = //获取response对象 
 response.getWriter().print(json); 
} 

public class JsonDateSerializer extends JsonSerializer<Date> { 
 private SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
 @Override 
 public void serialize(Date date, JsonGenerator gen, SerializerProvider provider) 
   throws IOException, JsonProcessingException { 
  String value = dateFormat.format(date); 
  gen.writeString(value); 
 } 
} 

@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss") 
@JsonSerialize(using=JsonDateSerializer.class) 
public Date getCreateTime() { 
 return this.createTime; 
} 

@DateTimeFormat(pattern="yyyy-MM-dd") 
public Date getBirthday() { 
 return this.birthday; 
} 

@DateTimeFormat(pattern="yyyy-MM-dd") 
@JsonSerialize(using=JsonDate2Serializer.class) 
public Date getBirthday() { 
 return this.birthday; 
} 

package com.xxx.utils; 
import java.io.IOException; 
import java.lang.reflect.AnnotatedElement; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import org.springframework.format.annotation.DateTimeFormat; 
import org.springframework.stereotype.Component; 
import com.fasterxml.jackson.core.JsonGenerator; 
import com.fasterxml.jackson.core.JsonProcessingException; 
import com.fasterxml.jackson.databind.JsonSerializer; 
import com.fasterxml.jackson.databind.ObjectMapper; 
import com.fasterxml.jackson.databind.SerializerProvider; 
import com.fasterxml.jackson.databind.introspect.Annotated; 
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod; 
import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector; 
 
/** 
 * json处理工具类 
 * @author zhangle 
 */ 
@Component 
public class JsonUtil { 
 
  private static final String DEFAULT_DATE_FORMAT="yyyy-MM-dd HH:mm:ss"; 
  private static final ObjectMapper mapper; 
   
  public ObjectMapper getMapper() { 
    return mapper; 
  } 
 
  static { 
    SimpleDateFormat dateFormat = new SimpleDateFormat(DEFAULT_DATE_FORMAT); 
     
    mapper = new ObjectMapper(); 
    mapper.setDateFormat(dateFormat); 
    mapper.setAnnotationIntrospector(new JacksonAnnotationIntrospector() { 
      @Override 
      public Object findSerializer(Annotated a) { 
        if(a instanceof AnnotatedMethod) { 
          AnnotatedElement m=a.getAnnotated(); 
          DateTimeFormat an=m.getAnnotation(DateTimeFormat.class); 
          if(an!=null) { 
            if(!DEFAULT_DATE_FORMAT.equals(an.pattern())) { 
              return new JsonDateSerializer(an.pattern()); 
            } 
          } 
        } 
        return super.findSerializer(a); 
      } 
    }); 
  } 
   
  public static String toJson(Object obj) { 
    try { 
      return mapper.writeValueAsString(obj); 
    } catch (Exception e) { 
      throw new RuntimeException("转换json字符失败!"); 
    } 
  } 
   
  public <T> T toObject(String json,Class<T> clazz) { 
    try { 
      return mapper.readValue(json, clazz); 
    } catch (IOException e) { 
      throw new RuntimeException("将json字符转换为对象时失败!"); 
    } 
  } 
   
  public static class JsonDateSerializer extends JsonSerializer<Date>{ 
   private SimpleDateFormat dateFormat; 
   public JsonDateSerializer(String format) { 
     dateFormat = new SimpleDateFormat(format); 
    } 
    
   @Override 
   public void serialize(Date date, JsonGenerator gen, SerializerProvider provider) 
     throws IOException, JsonProcessingException { 
    String value = dateFormat.format(date); 
    gen.writeString(value); 
   } 
  } 
} 

<mvc:annotation-driven> 
 <mvc:message-converters> 
  <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> 
   <property name="objectMapper" value="#{jsonUtil.mapper}"/> 
   <property name="supportedMediaTypes"> 
    <list> 
     <value>text/json;charset=UTF-8</value> 
    </list> 
   </property> 
  </bean> 
 </mvc:message-converters> 
</mvc:annotation-driven> 

@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss") 
public Date getCreateTime() { 
 return this.createTime; 
} 
@DateTimeFormat(pattern="yyyy-MM-dd") 
public Date getBirthday() { 
 return this.birthday; 
} 

<mvc:annotation-driven> 

package com.xxx.utils; 
 
import java.io.IOException; 
import java.text.SimpleDateFormat; 
import org.springframework.stereotype.Component; 
import com.fasterxml.jackson.databind.ObjectMapper; 
 
/** 
 * json处理工具类 
 * @author zhangle 
 */ 
@Component 
public class JsonUtil { 
 
 private static final String DEFAULT_DATE_FORMAT="yyyy-MM-dd HH:mm:ss"; 
 private static final ObjectMapper mapper; 
 
 static { 
  SimpleDateFormat dateFormat = new SimpleDateFormat(DEFAULT_DATE_FORMAT); 
  mapper = new ObjectMapper(); 
  mapper.setDateFormat(dateFormat); 
 } 
  
 public static String toJson(Object obj) { 
  try { 
   return mapper.writeValueAsString(obj); 
  } catch (Exception e) { 
   throw new RuntimeException("转换json字符失败!"); 
  } 
 } 
  
 public <t> T toObject(String json,Class<t> clazz) { 
  try { 
   return mapper.readValue(json, clazz); 
  } catch (IOException e) { 
   throw new RuntimeException("将json字符转换为对象时失败!"); 
  } 
 } 
} 

@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss") 
@JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8") 
public Date getCreateTime() { 
return this.createTime; 
} 
@DateTimeFormat(pattern="yyyy-MM-dd") 
@JsonFormat(pattern="yyyy-MM-dd",timezone = "GMT+8") 
public Date getBirthday() { 
 return this.birthday; 
}