04.简单的谈一下SpringMVC的工作流程.zip

package com.atguigu.springmvc.handler; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.CookieValue; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestHeader; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import com.atguigu.springmvc.entities.Department; import com.atguigu.springmvc.entities.Employee; @Controller public class SpringMVCHandler { public static final String SUCCESS="success"; //1.简单的谈一下SpringMVC的工作流程 //处理模型数据方式一：将方法的返回值设置为ModelAndView @RequestMapping("/testModelAndView") public ModelAndView testModelAndView() { //1.创建ModelAndView对象 ModelAndView mav = new ModelAndView(); //2.设置模型数据，最终会放到request域中 mav.addObject("user", "admin"); //3.设置视图 mav.setViewName("success"); return mav; } /* * ★处理模型数据方式二：方法的返回值仍是String类型，在方法的入参中传入Map、Model或者ModelMap * 不管将处理器方法的返回值设置为ModelAndView还是在方法的入参中传入Map、Model或者ModelMap， * SpringMVC都会转换为一个ModelAndView对象 */ @RequestMapping("/testMap") public String testMap(Map<String , Object> map) { //向Map中添加模型数据，最终会自动放到request域中 map.put("user", new Employee(1, "韩总", "[email protected]", new Department(101, "教学部"))); return SUCCESS; } }