java - Spring mvc 应用程序返回错误（404）未找到

问题描述

我是弹簧框架的新手。我正在尝试运行简单的 spring mvc 应用程序。据我所知，控制器具有有效路径，并且我已将所有必需的依赖项导入项目（maven）。在我运行项目之前，我使用命令clean install成功运行它，但它返回HTTP 404 NOT found 错误。

这是我的项目结构。

项目结构在这里

这是配置的代码。

Here is the code Configuration.
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;



@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "net.javaguides.springmvc.form" })
public class MVCConfig implements WebMvcConfigurer{

    @Bean
    public InternalResourceViewResolver resolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setViewClass(JstlView.class);
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
    
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry
          .addResourceHandler("/resources/**")
          .addResourceLocations("/resources/"); 
    }
}

这是注册控制器控制器的代码。

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;

import net.javaguides.springmvc.form.model.SignUpForm;

@Controller
public class SignUpController {

    /**
     * Create new signUpForm object for empty from
     * 
     * @return
     */
    @ModelAttribute("signUpForm")
    public SignUpForm setSignUpForm() {
        return new SignUpForm();
    }

    /**
     * Method to show the initial HTML form
     * 
     * @return
     */
    @GetMapping("/showSignUpForm")
    public String showForm() {
        return "signup-form";
    }

    /**
     * Save User sign up form
     * 
     * @param signUpForm
     * @param model
     * @return
     */
    @PostMapping("/saveSignUpForm")
    public String saveUser(@ModelAttribute("signUpForm") SignUpForm signUpForm, Model model) {

        // Implement business logic to save user details into a database
        // .....

        System.out.println("FirstName : " + signUpForm.getFirstName());
        System.out.println("LastName : " + signUpForm.getLastName());
        System.out.println("Username : " + signUpForm.getUserName());
        System.out.println("Password : " + signUpForm.getPassword());
        System.out.println("Email : " + signUpForm.getEmail());

        model.addAttribute("message", "User SignUp successfully.");
        model.addAttribute("user", signUpForm);

        return "signup-success";
    }

}

这是java类的代码。

public class SignUpForm {
    private String firstName;
    private String lastName;
    private String email;
    private String userName;
    private String password;
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

这是 pom.xml 的代码。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>net.javaguides.springmvc</groupId>
  <artifactId>springmvc5-form-handling</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>springmvc5-form-handling Maven Webapp</name>
  <url>http://maven.apache.org</url>
    <properties>
        <failOnMissingWebXml>false</failOnMissingWebXml>
    </properties>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.0.RELEASE</version>
        </dependency>

        <!-- JSTL Dependency -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>javax.servlet.jsp.jstl-api</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- Servlet Dependency -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- JSP Dependency -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <sourceDirectory>src/main/java</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

这是我在 tomcat 服务器上运行应用程序时的屏幕截图。

申请结果

标签： javaspringspring-mvcpom.xml

java - Spring mvc 应用程序返回错误（404）未找到

问题描述

解决方案

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