spring mvc jsp界面值渲染不出值

Posted 2020-10-20 dean_sammy

代码如下：

controller：

@Controller
public class Mv01Controller {
    private final Log logger = LogFactory.getLog(Mv01Controller.class);

    //处理Head类型的“/”请求
    @RequestMapping(value = {"/"}, method = RequestMethod.HEAD)
    public String head() {
        return "go.jsp";
    }

    //处理GET类型的“/”和“/index"请求
    @RequestMapping(value = {"/index", "/"}, method = RequestMethod.GET)
    public String index(Model model) throws Exception {
        logger.info("====processed by index");
        model.addAttribute("msg", "Go Go Go!");
        return "go.jsp";
    }
}

jsp使用${msg}接收model中的msg值，通过浏览器打开界面发现直接显示“${msg}”

后来发现原因如下：
在jsp页面使用了el正则表达式，jsp需要配置

<%@page isELIgnored="false" %>