springmvc学习笔记-返回json的日期格式问题的解决方法

 <dependency>
     <groupId>org.codehaus.jackson</groupId>
     <artifactId>jackson-mapper-asl</artifactId>
     <version>${jackson.version}</version>
 </dependency> 

@RequestMapping("json")
  @ResponseBody
  public List<User> userList(ModelMap modelMap){
    UserExample example = new UserExample();
    example.createCriteria().andUsernameIsNotNull();
    List<User> users = userMapper.selectByExample(example);
    return users;
  }

<!-- json数据 -->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>${jackson.version}</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>${jackson.core.version}</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>${jackson.core.version}</version>
    </dependency>


<properties>
    <jackson.version>1.9.13</jackson.version>
    <jackson.core.version>2.4.2</jackson.core.version>
</properties>

package com.demo.common.util.converter;

import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.JsonSerializer;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializerProvider;
import org.codehaus.jackson.map.ser.CustomSerializerFactory;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 解决Date类型返回json格式为自定义格式
 * Created by Administrator on 2016/2/14.
 */
public class CustomJsonDateConverter extends ObjectMapper {
  public CustomJsonDateConverter(){
    CustomSerializerFactory factory = new CustomSerializerFactory();
    factory.addGenericMapping(Date.class, new JsonSerializer<Date>(){
      @Override
      public void serialize(Date value,
                 JsonGenerator jsonGenerator,
                 SerializerProvider provider)
          throws IOException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        jsonGenerator.writeString(sdf.format(value));
      }
    });
    this.setSerializerFactory(factory);
  }
}

<mvc:annotation-driven>
    <mvc:message-converters>
      <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="objectMapper" ref="customObjectMapper"></property>
      </bean>
    </mvc:message-converters>
  </mvc:annotation-driven>
  <bean id="customObjectMapper" class="com.demo.common.util.converter.CustomJsonDateConverter"></bean>

<mvc:annotation-driven> 
  <!-- 处理responseBody 里面日期类型 --> 
    <mvc:message-converters> 
      <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> 
        <property name="objectMapper"> 
          <bean class="com.fasterxml.jackson.databind.ObjectMapper"> 
            <property name="dateFormat"> 
              <bean class="java.text.SimpleDateFormat"> 
                <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" /> 
              </bean> 
            </property> 
          </bean> 
        </property> 
      </bean> 
    </mvc:message-converters> 
  </mvc:annotation-driven>

 @JsonFormat(pattern="yyyy-MM-dd",timezone = "GMT+8")
  public Date getBirth() {
    return birth;
  }