一、jackson 基础测试（简单对象反序列化）
结果为：
{"userid":"c4764ef5234440c0a5ce35ce24f0b94d","username":null,"password":null,"link":null,"createTime":1496392724773,"timestamp":1496392724773}
{"userid":"c4764ef5234440c0a5ce35ce24f0b94d","username":null,"password":null,"link":null,"createTime":1496392724773,"timestamp":1496392724773}
二、jackson 基础测试（list反序列化）
结果为：
[{"userid":"bec82f06ca3e426cb493f7ee06ca9a33","username":null,"password":null,"link":null,"createTime":1496393056593,"timestamp":1496393056593},{"userid":"bec82f06ca3e426cb493f7ee06ca9a33","username":null,"password":null,"link":null,"createTime":1496393056593,"timestamp":1496393056593}]
[{"userid":"bec82f06ca3e426cb493f7ee06ca9a33","username":null,"password":null,"link":null,"createTime":1496393056593,"timestamp":1496393056593},{"userid":"bec82f06ca3e426cb493f7ee06ca9a33","username":null,"password":null,"link":null,"createTime":1496393056593,"timestamp":1496393056593}]
三、jackson 基础测试（map反序列化）
结果为：
{"7a5fbc514f8f4aa6a31df3a849f0ccf9":{"userid":"7a5fbc514f8f4aa6a31df3a849f0ccf9","username":null,"password":null,"link":null,"createTime":1496393375369,"timestamp":1496393375369},"2aae62fe4e1c43e7bb83fa659144cafd":{"userid":"2aae62fe4e1c43e7bb83fa659144cafd","username":null,"password":null,"link":null,"createTime":1496393375369,"timestamp":1496393375369}}
{"7a5fbc514f8f4aa6a31df3a849f0ccf9":{"userid":"7a5fbc514f8f4aa6a31df3a849f0ccf9","username":null,"password":null,"link":null,"createTime":1496393375369,"timestamp":1496393375369},"2aae62fe4e1c43e7bb83fa659144cafd":{"userid":"2aae62fe4e1c43e7bb83fa659144cafd","username":null,"password":null,"link":null,"createTime":1496393375369,"timestamp":1496393375369}}
四、jackson 基础测试（JsonProperty）
结果为：
{"username":null,"password":null,"link":null,"createTime":1496394720011,"Userid":"2f22ba65b2f74456a47c1897dccf5f51","Time":null}
{"username":null,"password":null,"link":null,"createTime":1496394720011,"Userid":"2f22ba65b2f74456a47c1897dccf5f51","Time":null}
五、jackson 基础测试（Date 的@JsonSerialize和@JsonDeserialize）
结果为：
{"username":null,"password":null,"link":null,"createTime":"2017-06-02 17:22:18","Userid":"fb8a50be9c3f4f148c1a48619cc1a88e","Time":null}
{"username":null,"password":null,"link":null,"createTime":"2017-06-02 17:22:18","Userid":"fb8a50be9c3f4f148c1a48619cc1a88e","Time":null}
六、jackson 基础测试（Timestamp 的@JsonSerialize和@JsonDeserialize）
结果中可以看到Timestamp已经成功的序列化和反序列化了。
七、jackson 基础测试（@JsonIgnore）
结果为：
{"username":null,"password":null,"createTime":"2017-06-05 10:56:38","Userid":"0c7e018661854919882414c6d488f63f","Time":"2017-06-05 10:56:38"}
{"username":null,"password":null,"createTime":"2017-06-05 10:56:38","Userid":"0c7e018661854919882414c6d488f63f","Time":"2017-06-05 10:56:38"}
这里我们已经看到link属性已经忽略了。
八、jackson 基础测试（SerializationFeature.INDENT_OUTPUT）
结果为：
{
"username" : null,
"password" : null,
"createTime" : "2017-06-05 11:03:47",
"Userid" : "2d52c96585804b809103c95198e10588",
"Time" : "2017-06-05 11:03:47"
}
{"username":null,"password":null,"createTime":"2017-06-05 11:03:47","Userid":"2d52c96585804b809103c95198e10588","Time":"2017-06-05 11:03:47"}
我们可以明白这里属性是进行缩放排列的。默认是进行缩放排列。
九、jackson 基础测试
a.SerializationFeature.WRITE_ENUMS_USING_TO_STRING
b.SerializationFeature.WRITE_ENUMS_USING_INDEX
结果为：
{
"userType" : 0,
"username" : null,
"password" : null,
"createTime" : "2017-06-05 11:12:32",
"Userid" : "01423140698d4bb78e608a697d139a5b",
"Time" : "2017-06-05 11:12:32"
}
{"userType":"admin","username":null,"password":null,"createTime":"2017-06-05 11:12:32","Userid":"01423140698d4bb78e608a697d139a5b","Time":"2017-06-05 11:12:32"}
SerializationFeature.WRITE_ENUMS_USING_TO_STRING：序列化枚举是以toString()来输出，默认false，即默认以name()来输出
SerializationFeature.WRITE_ENUMS_USING_INDEX：序列化枚举是以ordinal()来输出，默认false
十、jackson 基础测试（@JsonRootName）
结果为：
{"userinfo":{"userType":"common","username":null,"password":null,"createTime":"2017-06-05 11:18:37","Userid":"834449dc8abd47fa882fd668e9ad72fc","Time":"2017-06-05 11:18:37"}}
这里我们看到已经将userinfo加入到序列化的字符串中
（必须设置Serialization.WRAP_ROOT_NAME的值为true）;
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