@RequestParam 设置参数别名 -----------参数-------------------------------------------------------------------RequestParam来映射请求参数   required表示是否必须,默认为true   defaultValue请求参数的默认值value为接收前台参数的参数名------------示例------------------------------------------------------------------@RequestMapping(value = "/testRequestParam") public String testRequestParam(@RequestParam(value="username")String name, @RequestParam(value = "age",required = false,defaultValue = "0") int age){ System.out.println("username:"+un+",age,"+age); return "success"; }1.2.3.4.5.6.http://localhost:8080/sirdifoa/test/para?username=张三&age=301.结果为：username:张三，age=30

@RequestMapping注解的属性 暂无简介

@Controller注解的使用 暂无简介

配置事务 https://blog.csdn.net/nanhuaibeian/article/details/106240208

核心包的详解 Spring的四个基础jar包,分别对应Spring核心容器的四个模块。spring-core.jarspring-beans.jarspring-context.jarspring-expression.jar详解Spring：Spring的各jar包依赖及作用详解 - 怒吼的萝卜 - 博客园 (cnblogs.com)