springMvc與fastJson 集成時日期格式的問題

第一種重寫方法：

package com.jjs.util;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;

import org.springframework.http.HttpOutputMessage;
import org.springframework.http.converter.HttpMessageNotWritableException;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SimpleDateFormatSerializer;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

/**
 * 自定義fastJson日期轉換格式
 * 將默認的"yyyy-MM-dd HH:mm:ss"格式改爲 "yyyy-MM-dd"格式
 * @author jjs
 *
 */
public class JsonHttpMessageConverter extends FastJsonHttpMessageConverter{
	
	private static SerializeConfig mapping = new SerializeConfig();  
	private static String dateFormat;  
	static {  
	    dateFormat = "yyyy-MM-dd";  
	    mapping.put(Date.class, new SimpleDateFormatSerializer(dateFormat));  
	} 
	
	@Override
	protected void writeInternal(Object obj, HttpOutputMessage outputMessage)
			throws IOException, HttpMessageNotWritableException {
		// TODO Auto-generated method stub
		
		OutputStream out = outputMessage.getBody();
        String text = JSON.toJSONString(obj, mapping, this.getFeatures());
        byte[] bytes = text.getBytes(this.getCharset());
        out.write(bytes);
	}
	
}

第二種重寫方法：

package com.jjs.util;

import java.io.IOException;

import org.springframework.http.HttpOutputMessage;
import org.springframework.http.converter.HttpMessageNotWritableException;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

public class JsonHttpMessageConverter extends FastJsonHttpMessageConverter {

	@Override
	protected void writeInternal(Object obj, HttpOutputMessage outputMessage)
			throws IOException, HttpMessageNotWritableException {
		// TODO Auto-generated method stub
		JSON.DEFFAULT_DATE_FORMAT = "yyyy-MM-dd HH";
		JSON.toJSONString(obj, SerializerFeature.WriteDateUseDateFormat);
		super.writeInternal(obj, outputMessage);

	}

}

然後，將springMVC.xml(具體文件名以項目而定) 的配置修改爲如下, 引用重寫了writeInternal()方法的類進行json序列化

<mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!-- <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter"> -->
            <bean class="com.jjs.util.JsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json</value>
                    </list>
                </property>
                <property name="features">
                    <list>
                    <value>WriteDateUseDateFormat</value>
                        <value>WriteMapNullValue</value>
                        <value>QuoteFieldNames</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>