首页 > itarticle > spring实战第四版读书笔记-第五章 spring构建web应用

spring实战第四版读书笔记-第五章 spring构建web应用

admin 11月 13, 2020 0

[TOC]

#构建Spring Web应用程序

Spring MVC

Spring MVC 请求流程

请求—> org.springframework.web.servlet.DispatcherServlet
DispatcherServlet处理请求
DispatcherServlet —>控制器
控制器 —> 模型及逻辑视图名
模型及逻辑视图名 —> DispatcherServlet
DispatcherServlet —>视图解析器
响应视图 —> 用户

路径变量

(method = RequestMethod.GET, value="/blog/{id}")
	public ModelAndView (@PathVariable("id") Long id) throws Exception
	{
		ModelAndView modelAndView = new ModelAndView(JspConstant.BLOG_ITEM);
		BlogArticle article = mBlogArticleService.getBy(id);
		modelAndView.addObject(ATTR_NAME_ARTICLE, article);
		return modelAndView;
	}

参数验证

(method = RequestMethod.POST, value="/blogAdd.do")
	public ModelAndView blogAdd(HttpServletRequest request,
			@Valid BlogArticle article,
			Errors errors) throws Exception
	{
		if(errors.hasErrors()){
			return  new ModelAndView("blog_add");
		}
		mBlogArticleService.addArticle(article);
		ModelAndView modelAndView = new ModelAndView("redirect:/indexBlog.do");
		return modelAndView;
	}