SpringMVC 修改 GsonHttpMessageConverter 的默认Gson配置,解决日期异常的问题

原连接：https://my.oschina.net/unteacher/blog/693292?from=mail-notify

异常内容：

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: 2019-12-19 17:24:10; nested exception is com.google.gson.JsonSyntaxException: 2019-12-19 17:24:10
at org.springframework.http.converter.json.GsonHttpMessageConverter.readTypeToken(GsonHttpMessageConverter.java:165) ~[spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]
at org.springframework.http.converter.json.GsonHttpMessageConverter.read(GsonHttpMessageConverter.java:123) ~[spring-web-4.3.18.RELEASE.jar:4.3.18.RELEASE]

Caused by: com.google.gson.JsonSyntaxException: 2019-12-19 17:24:10
at com.google.gson.internal.bind.DateTypeAdapter.deserializeToDate(DateTypeAdapter.java:78) ~[gson-2.0.jar:na]
at com.google.gson.internal.bind.DateTypeAdapter.read(DateTypeAdapter.java:63) ~[gson-2.0.jar:na]
at com.google.gson.internal.bind.DateTypeAdapter.read(DateTypeAdapter.java:38) ~[gson-2.0.jar:na]

以下我的实现方案：

通过子类构造重修改GsonHttpMessageConverter的gson对象

package com.its.mmo;

import org.springframework.http.converter.json.GsonHttpMessageConverter;

import com.google.gson.GsonBuilder;
/**
 * SpringMVC 
 * Json转换工具设置
 * @author ALLEN
 *
 */
public class MmoJsonConverter extends GsonHttpMessageConverter{
	public MmoJsonConverter(){
		//更换Gson转换器
		super.setGson(new GsonBuilder()
						.serializeNulls()		//null值属性也需要序列化
						.setDateFormat("yyyy-MM-dd HH:mm:ss") //设置日期转换
						.create());
	}
}

<mvc:annotation-driven>

<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean class="com.its.mmo.MmoJsonConverter">
</bean>
</mvc:message-converters>
</mvc:annotation-driven>