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FastJson---高性能JSON开发包

2015-04-29 10:36 489 查看
Fastjson介绍

Fastjson是一个Java语言编写的JSON处理器,由阿里巴巴公司开发。

1、遵循http://json.org标准,为其官方网站收录的参考实现之一。

2、功能qiang打,支持JDK的各种类型,包括基本的JavaBean、Collection、Map、Date、Enum、泛型。

3、无依赖,不需要例外额外的jar,能够直接跑在JDK上。

4、开源,使用Apache License 2.0协议开源。http://code.alibabatech.com/wiki/display/FastJSON/Home

5、具有超高的性能,java世界里没有其他的json库能够和fastjson可相比了。

如果获得Fastjson?

SVN:http://code.alibabatech.com/svn/fastjson/trunk/

WIKI:http://code.alibabatech.com/wiki/display/FastJSON/Home

Issue Tracking:http://code.alibabatech.com/jira/browse/FASTJSON

如果你使用了Maven,maven repository配置如下:

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span style="font-size: 13px;"><repository>
<id>opensesame</id>
<name>Alibaba OpenSource Repsoitory</name>
<url>http:</span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">//code.alibabatech.com/mvn/releases/</url>
</span></span><span style="font-size: 13px;">	<snapshots>
<enabled></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">false</span></span><span style="font-size: 13px;"></enabled>
</snapshots>
</repository></span>



pom.xml文件中加入依赖依赖:

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span style="font-size: 13px;"><dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.0.4</version>
</dependency></span>



如果没有使用maven,可以直接下载:

Binary : http://code.alibabatech.com/mvn/releases/com/alibaba/fastjson/1.1.1/fastjson-1.1.1.jar

Source :http://code.alibabatech.com/mvn/releases/com/alibaba/fastjson/1.1.1/fastjson-1.1.1-sources.jar

Subversion : http://code.alibabatech.com/svn/fastjson/

使用介绍:

Fastjson的最主要的使用入口是com.alibaba.fastjson.JSON

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">import</span></span><span style="font-size: 13px;"> com.alibaba.fastjson.JSON;

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Object</span></span><span style="font-size: 13px;"> parse(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> text); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 把JSON文本parse为JSONObject或者JSONArray
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> JSONObject parseObject(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> text); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 把JSON文本parse成JSONObject
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> <T> T parseObject(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> text, </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Class</span></span><span style="font-size: 13px;"><T> clazz); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 把JSON文本parse为JavaBean
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> JSONArray parseArray(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> text); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 把JSON文本parse成JSONArray
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> <T> List<T> parseArray(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> text, </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Class</span></span><span style="font-size: 13px;"><T> clazz); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">//把JSON文本parse成JavaBean集合
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> toJSONString(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Object</span></span><span style="font-size: 13px;"> object); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 将JavaBean序列化为JSON文本
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> toJSONString(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Object</span></span><span style="font-size: 13px;"> object, </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">boolean</span></span><span style="font-size: 13px;"> prettyFormat); </span><span class="code-comment" style="color: rgb(128, 128, 128); background-color: inherit;"><span style="font-size: 13px;">// 将JavaBean序列化为带格式的JSON文本
</span></span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">static</span></span><span style="font-size: 13px;"> </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">final</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Object</span></span><span style="font-size: 13px;"> toJSON(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Object</span></span><span style="font-size: 13px;"> javaObject); 将JavaBean转换为JSONObject或者JSONArray。</span>



代码示例:

代码示例用到类User和Group:

<div class="code panel" style="font-family: 'microsoft yahei'; font-size: 15px; line-height: 35px; padding: 0px; margin: 0px 0px 10px; border: 1px dashed rgb(187, 187, 187); overflow: auto;"><div class="codeContent panelContent" style="color: rgb(51, 51, 51); margin: 0px; padding: 0px 10px;"><pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> class User {
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">private</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> id;
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">private</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> name;

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> getId() { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">return</span></span><span style="font-size: 13px;"> id; }
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> void setId(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> id) { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">this</span></span><span style="font-size: 13px;">.id = id; }

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> getName() { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">return</span></span><span style="font-size: 13px;"> name; }
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> void setName(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> name) { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">this</span></span><span style="font-size: 13px;">.name = name; }
}
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> class Group {
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">private</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> id;
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">private</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> name;
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">private</span></span><span style="font-size: 13px;"> List<User> users = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> ArrayList<User>();

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> getId() { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">return</span></span><span style="font-size: 13px;"> id; }
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> void setId(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">Long</span></span><span style="font-size: 13px;"> id) { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">this</span></span><span style="font-size: 13px;">.id = id; }

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> </span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> getName() { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">return</span></span><span style="font-size: 13px;"> name; }
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> void setName(</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> name) { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">this</span></span><span style="font-size: 13px;">.name = name; }

</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> List<User> getUsers() { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">return</span></span><span style="font-size: 13px;"> users; }
</span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">public</span></span><span style="font-size: 13px;"> void setUsers(List<User> users) { </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">this</span></span><span style="font-size: 13px;">.users = users; }
}
</span>


Encode代码示例:

<span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">import</span></span><span style="font-size: 13px;"> com.alibaba.fastjson.JSON;

Group group = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> Group();
group.setId(0L);
group.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"admin"</span></span><span style="font-size: 13px;">);

User guestUser = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> User();
guestUser.setId(2L);
guestUser.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"guest"</span></span><span style="font-size: 13px;">);

User rootUser = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> User();
rootUser.setId(3L);
rootUser.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"root"</span></span><span style="font-size: 13px;">);

group.getUsers().add(guestUser);
group.getUsers().add(rootUser);

</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> jsonString = JSON.toJSONString(group);

</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">System</span></span><span style="font-size: 13px;">.out.println(jsonString);</span>




Encode代码示例:

<span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">import</span></span><span style="font-size: 13px;"> com.alibaba.fastjson.JSON;

Group group = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> Group();
group.setId(0L);
group.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"admin"</span></span><span style="font-size: 13px;">);

User guestUser = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> User();
guestUser.setId(2L);
guestUser.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"guest"</span></span><span style="font-size: 13px;">);

User rootUser = </span><span class="code-keyword" style="color: rgb(0, 0, 145); background-color: inherit;"><span style="font-size: 13px;">new</span></span><span style="font-size: 13px;"> User();
rootUser.setId(3L);
rootUser.setName(</span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"root"</span></span><span style="font-size: 13px;">);

group.getUsers().add(guestUser);
group.getUsers().add(rootUser);

</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">String</span></span><span style="font-size: 13px;"> jsonString = JSON.toJSONString(group);

</span><span class="code-object" style="color: rgb(145, 0, 145); background-color: inherit;"><span style="font-size: 13px;">System</span></span><span style="font-size: 13px;">.out.println(jsonString);
</span>


Decode 代码示例:

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span style="font-size: 13px;">Group group2 = JSON.parseObject(jsonString, Group.class);</span>



之前的一个版本是1.1.0,1.1.0采用asm和SortFastMatch算法提高性能,由于过于着急展示其优越的性能,没有进行严格测试就发布了。

1.1.1相对于1.1.0,这是一个比较稳定的版本了,行测试覆盖率重新提升到90%以上,build verify testcase 983个。

这个版本进一步完善了asm和SortFieldFastMatch算法,进一步提升了性能,同时补充了大量的testcase,提升了稳定性,我向你推荐使用这个版本,使用这个版本你将会得到令人惊奇的性能。

1.1.1版本的asm来源自objectweb的asm项目,根据fastjson的需要做裁剪,确保引入asm的同时不引起包大小的过渡变大。

为了更好使用sort field martch优化算法提升parser的性能,fastjson序列化的时候,缺省把SerializerFeature.SortField特性打开了。反序列化的时候也缺省把SortFeidFastMatch的选项打开了。这样,如果你用fastjson序列化的文本,输出的结果是按照fieldName排序输出的,parser时也能利用这个顺序进行优化读取。这种情况下,parser能够获得非常好的性能。

我使用github.com/eishay/jvm-serializers/提供的程序做测试,性能数据如下:

序列化时间反序列化时间大小压缩后大小
java序列化854643199889541
hessian664310043501313
protobuf30081694239149
thrift31821951349197
avro35752095221133
json-lib45734149741485263
jackson32452986503271
fastjson22921499468251
测试跑的脚本是:

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span style="font-size: 13px;">./run -chart -include=`cat serializers.txt | tr </span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">"\\n"</span></span><span style="font-size: 13px;"> </span><span class="code-quote" style="color: rgb(0, 145, 0); background-color: inherit;"><span style="font-size: 13px;">","</span></span><span style="font-size: 13px;">`  data/media.1.cks</span>



从上面的数据来看,fastjson的性能已经超越protobuf、thrift、avro这些二进制协议了。一个文本协议的性能超越二进制协议是很难的,我很高兴向大家宣布我做到了!!

鉴于fastjson优越的性能表现,我建议做如下事情;

1、替换其他所有的json库,java世界里没有其他的json库能够和fastjson可相比了。

2、使用fastjson的序列化和反序列化替换java serialize,java serialize不单性能慢,而且体制大。

3、使用fastjson替换hessian,json协议不必hessian体积大,而且fastjson性能优越,数倍于hessian

4、把fastjson用于memached缓存对象数据。


How to get it?

If you're Maven user, just use our maven repository(http://code.alibabatech.com/mvn/releases/)
with folloging dependency

<pre class="code-java" name="code" style="white-space: pre-wrap; word-wrap: break-word; color: rgb(51, 51, 51); font-size: 15px; padding: 0px; margin-top: 0px; margin-bottom: 0px; overflow: auto; font-family: 'Courier New', Courier, monospace; line-height: 1.3;"><span style="font-size: 13px;"><dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.1</version>
</dependency></span>




Downlaods

Binary : http://code.alibabatech.com/mvn/releases/com/alibaba/fastjson/1.1.1/fastjson-1.1.1.jar

Source :http://code.alibabatech.com/mvn/releases/com/alibaba/fastjson/1.1.1/fastjson-1.1.1-sources.jar

Subversion : http://code.alibabatech.com/svn/fastjson/
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