xml中${}的含义
在applicationContext.xml文件中,使用 ${xxx} 表示的是:调用某个变量,该变量的名称就是{xxx}里面的"xxx"。
gson
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
fastjson
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.53</version>
</dependency>
StringUtisl
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.5</version>
</dependency>
hutool
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>4.5.16</version>
</dependency>
joda
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
</dependency>