Spring MVC with Boot：“出现意外错误（type = Not Found，status = 404）” [英] Spring MVC with Boot: "There was an unexpected error (type=Not Found, status=404)"

问题描述

所以我是Spring的新手，到目前为止我已经运行了一个连接到MongoDB数据库的简单Web API，但是我在使用.jsp或.html文件生成普通的旧视图时遇到了麻烦。我尝试了各种不同的方法： InternalResourceViewResolver ， XmlViewResolver ，返回字符串而不是 ModelAndView 对象，似乎没有什么对我有用。我有以下代码：

So I'm new to Spring and I've so far gotten a simple web API running connected to a MongoDB database, but I'm having trouble generating just plain old views using .jsp or .html files. I've tried a variety of different approaches: InternalResourceViewResolver, XmlViewResolver, returning Strings instead of ModelAndView objects, nothing seems to be working for me. I have the following code:

编辑：这是我的项目的git repo： https://github.com/jwallp/Spring-Test

Edit: here is a git repo with my project: https://github.com/jwallp/Spring-Test

作为上述项目是的，我在转到 / index 时收到白标错误，其中说：

As the above project is, I am getting a white label error upon going to /index which says:

There was an unexpected error (type=Internal Server Error, status=500).
Circular view path [index]: would dispatch back to the current handler URL [/index] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

编辑：所以我设法通过使用 spring.view.prefix 和 spring.view来最终加载视图。后缀而不是 spring.mvc.view.prefix 等等，并移动我的 WEB-INF 从我的项目根目录到内部< project root> / src / main / webapp / 的目录。我只是想知道，如果我的 WEB-INF 目录包含在另一个目录中，它是否仍然按预期运行（使其内容不直接可见）？

Edit: So I managed to get the view to finally load by using spring.view.prefix and spring.view.suffix instead of spring.mvc.view.prefix and such, and by moving my WEB-INF directory from my project root to inside <project root>/src/main/webapp/. I just wanted to know, if my WEB-INF directory is contained within another directory, will it still function as intended (making its contents not directly visible)?

推荐答案

希望你的类路径中有JSP库。如果你正在使用maven，包括 pom.xml 中的以下依赖项将包含：

Hope you have the JSP libraries in your classpath. If you are using maven, including the following dependencies in pom.xml will have those:

    <!-- For using JSP -->
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>

    <!-- If you want to use JSTL -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

此外，您可能需要将此行放在JSP文件的顶部：

Also, you may need to put this line at the top of the JSP file:

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>

更新

在我的环境中对GitHub项目进行以下更改：

Doing the following changes to your project at GitHub worked in my environment:

1. 将WEB-INF文件夹移动到的src /主/ web应用。这就是它的地方。



2. 在 application.properties 替换

1. Move the WEB-INF folder into src/main/webapp. That's the place for it.

2. In application.properties replace

spring.mvc.view.prefix=/WEB-INF/pages/
spring.mvc.view.suffix=.jsp

with

spring.view.prefix: /WEB-INF/pages/
spring.view.suffix: .jsp

似乎前者将使用Spring Boot 1.3 ，但不是目前稳定发布。

Seems the former will work with Spring Boot 1.3, but not not with the current stable release.

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