以前，關於返回json字串date型別變成long（時間戳）型別，一直存在困難，兩個方面，1，通過前端的格式轉化；2，同事date轉成string型別，再做傳值，如此既降低編碼效率又不利於全端開發人員的工作負擔。為此今天做如下總結；

第一步：設計組價

package edu.sjtu.nicman.web.controller.config;

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

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 org.springframework.stereotype.Component
 
;

@Component("customObjectMapper")
public class CustomObjectMapper  extends ObjectMapper {
    public CustomObjectMapper() {
        CustomSerializerFactory factory = new CustomSerializerFactory();
        factory.addGenericMapping(Date.class, new JsonSerializer<Date>() {

            @Override
            public void serialize(Date arg0, JsonGenerator arg1,
                                  SerializerProvider arg2) throws IOException,
                    JsonProcessingException {
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"
 
);
                arg1.writeString(sdf.format(arg0));
            }

        });
        this.setSerializerFactory(factory);
    }

}

第二步：元件配置
以下是對json格式和date型別時間轉化的配置

<!-- 以下為SpringMVC配置 -->
    <mvc:annotation-driven>
        <!-- 返回json資料，@response使用 -->
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
                <property name="objectMapper" ref="customObjectMapper"></property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

第三步：在需要轉換格式的欄位添加註解

    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
    private Date time0;