[3.2.1、控制器的定义](3.2.1%E3%80%81%E6%8E%A7%E5%88%B6%E5%99%A8%E7%9A%84%E5%AE%9A%E4%B9%89.md) [3.2.2、显示模板](3.2.2%E3%80%81%E6%98%BE%E7%A4%BA%E6%A8%A1%E6%9D%BF.md) [3.2.3、模板变量赋值](3.2.3%E3%80%81%E6%A8%A1%E6%9D%BF%E5%8F%98%E9%87%8F%E8%B5%8B%E5%80%BC.md) [3.2.4、json输出](3.2.4%E3%80%81json%E8%BE%93%E5%87%BA.md)