表单提交后转发到 Spring Controller 中的 JSP

Question

使用 Spring @Controller、@RequestMapping 和 @ModelAttribute，我想实现一个基本的表单提交流程，其中用户被转发到具有属性集的新 JSP。 Spring 提供了不同的方法来实现这一点，但我收到了各种错误。

示例 1 基于教程：https://www.baeldung.com/spring-mvc-form-tutorial

form.html

<form action="/submitForm" method="POST">
    <input type="text"id="field1" name="field1">
    <!-- other input fields -->
    <button type="submit">Submit</button>
</form>

success.jsp

<p>Thanks for signing up ${userName}!!</p>

MyController.java

@Controller
public class MyController{

    @RequestMapping(
            value = "/submitForm", 
            method = RequestMethod.POST,
            consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public String post(@ModelAttribute SignupRequest request, ModelMap model){
        // At this point, the SignupRequest is populated correctly 
        model.addAttribute("userName", request.getUserName());

        return "success";
    }
}

结果

1. 使用return "success" - 结果是HTTP 404 Not Found
2. 使用return "success.jsp"，结果是HTTP 405 请求方法 不支持“POST”
3. 使用return "redirect:/success.jsp"，客户端被重定向， 但未设置属性，并且 ${userName} 可见。

示例 2 基于此处接受的答案：Redirect after POST method in spring MVC

MyController.java

@Controller
public class MyController{

    @RequestMapping(
            value = "/submitForm", 
            method = RequestMethod.POST,
            consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public ModelAndView post(@ModelAttribute SignupRequest request){
        // At this point, the SignupRequest is populated correctly 

        ModelAndView mAV = new ModelAndView("redirect:/success.jsp");
        mAV.addObject("userName", request.getUserName());

        return mAV;
    }
}

结果 客户端被重定向，但属性未设置，${userName} 可见。

这样做的正确方法是什么？

谢谢！

编辑 额外细节 使用带有嵌入式 Tomcat 的 SpringBoot。 JSP 文件位于src>main>resources>public。正在提供原始 JSP。我相信该项目没有按应有的方式对待 JSP。添加 POM 部门。

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>18.0</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-email</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>2.2.11</version>
        </dependency>
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-core</artifactId>
            <version>2.2.11</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.23.1-GA</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>
    </dependencies>

Answer 1

@Controller
public class MyController{

    @RequestMapping(
            value = "/submitForm", 
            method = RequestMethod.POST,
            consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public RedirectView post(@ModelAttribute SignupRequest request, RedirectAttributes ra){
        // At this point, the SignupRequest is populated correctly 

        RedirectView rw = new RedirectView();
        rw.setUrl("success.jsp");
        ra.addFlashAttribute("userName", request.getUserName());

        return rw;
    }
}