fastjson 2.0.28 发布

fastjson 2.0.28 现已发布。这又是一个 Bug 修复功能增强版本，大家按需升级。最近非常多用户从 fastjson 1.1.x 升级到 2.0.x，升级后获得性能显著提升，dubbo 用户使用 fastjson2 二进制格式 JSONB 的用户也越来越多，这次的发布也修复了一些相关的问题。

Maven 中央仓库的统计数据显示，2023 年 4 月份 fastjson2 下载量为 45 万。

![](http://doc.xiqi.site/media/202304/2023-04-16_085947_6797530.7936504607991731.png)

**Issues**

1.  修复某些场景 spring-doc 接口文档无法显示的问题 [#387](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F387)
2.  修复日期格式反序列化自动识别 yyyyMMddHHmmss 格式和 fastjson 1.x 不一致的问题 [#1326](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1326)
3.  修复对 Hutool 库 Dict 类型序列化结果不对的问题 [#1337](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1337) [#1338](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1338)
4.  修复 JSONWriter.Feature.BrowserCompatible 在 Map Key 中不生效的问题 [#1350](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1350)
5.  修复 List<Map<String, List>> 类型反序列化报错的问题 [#1351](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1351)
6.  修复 Map 类型反序列化输入为空字符串报错的问题 [#1356](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1356)
7.  修复枚举类型字段缺省输出不是 name 的问题 [#1355](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1355)
8.  修复 int 类型输入超大数字越界时不报错的问题 [#1357](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1357)
9.  修复 JSONSchema 校验字符串类型的枚举和常量不起作用的问题 [#1367](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1367)
10.  修复 JSONB 在某些场景处理 autoType 报错的问题 [#1366](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1366)
11.  JSONPath 支持 "A.B \[?(@.C==null)\]" 这样的过滤条件 [#1369](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1369)
12.  修复配置 NameFilter 后 writeNull 结果不对的问题 [#1348](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1348)
13.  增强日期格式的自动识别 [#1325](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fissues%2F1325)
14.  增强对 CSV 的支持 [https://github.com/alibaba/fastjson2/blob/2.0.28/docs/csv\_cn.md](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fblob%2F2.0.28%2Fdocs%2Fcsv_cn.md)

**MAVEN 依赖配置**

<dependency\>
    <groupId\>com.alibaba.fastjson2</groupId\>
    <artifactId\>fastjson2</artifactId\>
    <version\>2.0.28</version\>
</dependency\>

1.x 兼容版本

<dependency\>
    <groupId\>com.alibaba</groupId\>
    <artifactId\>fastjson</artifactId\>
    <version\>2.0.28</version\>
</dependency\>

Spring 5 extension 配置

<dependency\>
    <groupId\>com.alibaba.fastjson2</groupId\>
    <artifactId\>fastjson2-extension-spring5</artifactId\>
    <version\>2.0.28</version\>
</dependency\>

Spring 6 extension 配置

<dependency\>
    <groupId\>com.alibaba.fastjson2</groupId\>
    <artifactId\>fastjson2-extension-spring6</artifactId\>
    <version\>2.0.28</version\>
</dependency\>

**相关链接**

-   FASTJSON 1.x 用户升级指南 [https://github.com/alibaba/fastjson2/wiki/fastjson\_1\_upgrade\_cn](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fwiki%2Ffastjson_1_upgrade_cn)
-   相关 issues [https://github.com/alibaba/fastjson2/milestone/27](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fmilestone%2F27)
-   代码 tag [https://github.com/alibaba/fastjson2/tree/2.0.28](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Ftree%2F2.0.28)
-   Maven 下载 [https://repo1.maven.org/maven2/com/alibaba/fastjson2/fastjson2/2.0.28/](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Frepo1.maven.org%2Fmaven2%2Fcom%2Falibaba%2Ffastjson2%2Ffastjson2%2F2.0.28%2F)
-   1.x 兼容版本 [https://repo1.maven.org/maven2/com/alibaba/fastjson/2.0.28/](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Frepo1.maven.org%2Fmaven2%2Fcom%2Falibaba%2Ffastjson%2F2.0.28%2F)
-   性能测试报告 [https://github.com/alibaba/fastjson2/blob/main/docs/benchmark/benchmark\_2.0.28.md](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Fblob%2Fmain%2Fdocs%2Fbenchmark%2Fbenchmark_2.0.28.md)

更新说明： [https://github.com/alibaba/fastjson2/releases/tag/2.0.28](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fgithub.com%2Falibaba%2Ffastjson2%2Freleases%2Ftag%2F2.0.28)