# ssm学习笔记精选(2)

1. 获取当前时间戳
   long time = (int) (System.currentTimeMillis() / 1000);
   System.out.println(time);
   2.三元运算符
   ${vo.status==1?'checked':''}

2. 导出

<!--excel导出 -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.10-FINAL</version>
        </dependency>
         <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
             <version>3.10-FINAL</version>
        </dependency>
       <dependency>
          <groupId>org.apache.poi</groupId>
          <artifactId>poi</artifactId>
          <version>3.10-FINAL</version>
        </dependency>