[springmvc]rendering view

1. DispatcherServlet render Views

　　Alternative to having a HttpMessageConverter write the response body

　　Designed for generating text/* content from a template

    @RequestMapping(value="html", method=RequestMethod.GET)
    public String prepare(Model model) {
        model.addAttribute("foo", "bar");
        model.addAttribute("fruit", "apple");
        return "views/html";
    }

2. Model parameter to export data to the view

　　Call model.addAttribute(“name”, value) for each item to export

    @RequestMapping(value="/viewName", method=RequestMethod.GET)
    public void usingRequestToViewNameTranslator(Model model) {
        model.addAttribute("foo", "bar");
        model.addAttribute("fruit", "apple");
    }

3. Select the view by to render by returning a String

　　Do not use @ResponseBody annotation in this case

　　Configured ViewResolver maps name to a View instance

    @RequestMapping(value="pathVariables/{foo}/{fruit}", method=RequestMethod.GET)
    public String pathVars(@PathVariable String foo, @PathVariable String fruit) {
        // No need to add @PathVariables "foo" and "fruit" to the model
        // They will be merged in the model before rendering
        return "views/html";
    }

4. Default ViewResolver forwards to internal servlet resources

　　Many other options: JSP, Tiles, Freemarker, Velocity, iText PDF, JExcel, Jasper Reports, and XSLT are all supported out of the box

　　Can also write your own View integrations

    @RequestMapping(value="dataBinding/{foo}/{fruit}", method=RequestMethod.GET)
    public String dataBinding(@Valid JavaBean javaBean, Model model) {
        // JavaBean "foo" and "fruit" properties populated from URI variables 
        return "views/dataBinding";
    }