Spring Java Web：REST API

Question

我從PostMan向Spring Rest Application發布數據時遇到問題。 每當發送數據時，都會出現此錯誤（HTTP狀態404：所請求的資源不可用。[ ）

沒有跡象表明控制台中的代碼有錯誤。 所以我不明白為什么我仍然不能發布數據。 我已經重新檢查了一切

控制者

    @Controller
public class CommerceController {

    private static final Logger logger = LoggerFactory.getLogger(CommerceController.class);
    private ProductService productService;

    private UserService userService;

    @Autowired
    public void setProductService(ProductService productService) {
        this.productService = productService;
    }
    /*//Map to store the product but later use database
    Map<Integer, Product>prodData= new HashMap<Integer, Product>();*/

    @RequestMapping(value = "/", method = RequestMethod.GET, produces = "application/json")
    public
    @ResponseBody
    List home() {
        System.out.println("This is the usermodel check it out: "+"Get REQUEST");
        productService.runtest();
        return productService.allProducts();
    }


    @RequestMapping("/products")
    public List getProducts() {
        productService.runtest();
        return productService.allProducts();
    }



    //-------------------Create a User--------------------------------------------------------

    @RequestMapping(value = "/user/", method = RequestMethod.POST, headers = "Content-Type:application/x-www-form-urlencoded")
    public  ResponseEntity<Void> createUser(@RequestBody UserModel user, UriComponentsBuilder ucBuilder) {
        System.out.println("Creating User " + user.getName());

        if (userService.isExist(user.getUsername())) {
            System.out.println("A User with name " + user.getName() + " already exist");
            return new ResponseEntity<Void>(HttpStatus.CONFLICT);
        }

        userService.createUser(user);

        HttpHeaders headers = new HttpHeaders();
        headers.setLocation(ucBuilder.path("/user/{id}").buildAndExpand(user.getId()).toUri());
        return new ResponseEntity<Void>(headers, HttpStatus.CREATED);
    }



    /*public @ResponseBody Product home(){
        logger.info("Starting getDammyProduct");
        product.setName("SAMSUNG TV");
        product.setId(1);
        product.setCreatedDate(new Date());

        return product;

    }*/
}

enter code here

我的web.xml

</welcome-file-list>
  <servlet>
    <description></description>
    <display-name>commerce</display-name>
    <servlet-name>commerce</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>commerce</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
 <!-- Bootstraps the root web application context before servlet initialization -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- Calling the context listeners -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
        classpath:com/javasoft/beans/config/dao-context.xml
        classpath:com/javasoft/beans/config/security-context.xml
        classpath:com/javasoft/beans/config/service-context.xml
        </param-value>
    </context-param>


</web-app>

Pom.xml

     <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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.javasoft.smartshoppers</groupId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.6</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <artifactId>Commerce</artifactId>
  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.6.6</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-core</artifactId>
        <version>4.1.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-mongodb</artifactId>
        <version>1.9.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.mongodb</groupId>
        <artifactId>mongo-java-driver</artifactId>
        <version>3.3.0</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.1.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
        <version>4.1.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>4.1.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
        <version>4.1.3.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.webflow</groupId>
        <artifactId>spring-webflow</artifactId>
        <version>2.4.4.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>
  </dependencies>

</project>

用戶模型

    @Document(collection = "users")
public class UserModel implements UserDetails, Serializable {
    @Id
    private String id;

    private String name;

    private String username;
    private String password;
    private String email;


    /*Spring Security UserDetails*/
    private List<Role> authorities;
    private boolean accountNonExpired = true;
    private boolean accountNonLocked = true;
    private boolean credentialsNonExpired = true;
    private boolean enable = false;

/*Empty constructor*/
    public UserModel() {
    }
    /*Constructor with fields */

    public UserModel(String name, String username, String password, String email, List<Role> authorities, boolean accountNonExpired, boolean accountNonLocked, boolean credentialsNonExpired, boolean enable) {
        this.name = name;
        this.username = username;
        this.password = password;
        this.email = email;
        this.authorities = authorities;
        this.accountNonExpired = accountNonExpired;
        this.accountNonLocked = accountNonLocked;
        this.credentialsNonExpired = credentialsNonExpired;
        this.enable = enable;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    @Override
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public List<Role> getAuthorities() {
        return authorities;
    }

    public void setAuthorities(List<Role> authorities) {
        this.authorities = authorities;
    }

    @Override
    public boolean isAccountNonExpired() {
        return accountNonExpired;
    }

    public void setAccountNonExpired(boolean accountNonExpired) {
        this.accountNonExpired = accountNonExpired;
    }

    @Override
    public boolean isAccountNonLocked() {
        return accountNonLocked;
    }

    public void setAccountNonLocked(boolean accountNonLocked) {
        this.accountNonLocked = accountNonLocked;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return credentialsNonExpired;
    }


    public void setCredentialsNonExpired(boolean credentialsNonExpired) {
        this.credentialsNonExpired = credentialsNonExpired;
    }



    public void setEnable(boolean enable) {
        this.enable = enable;
    }
    @Override
    public boolean isEnabled() {
        return enable;
    }

}

獲取請求成功，但是在發布時出現404錯誤。 我已經記錄了post方法，並且已經確認它不是bieng調用的方法。 有人可以指出我在哪里做錯了，或者遺漏了什么嗎？

Answer 1

嘗試改變

@RequestMapping(value = "/user/", method = RequestMethod.POST, headers = "Content-Type:application/x-www-form-urlencoded")

至

@RequestMapping(value = "/user", method = RequestMethod.POST, headers = "Content-Type:application/x-www-form-urlencoded")

或設置

<servlet-mapping>
    <servlet-name>commerce</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

至

<servlet-mapping>
    <servlet-name>commerce</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

Answer 2

1. 該網址區分大小寫。 由於web.xml中的內容是小寫commerce ，因此URL中應該包含該內容。

2. 您還應該像其他人所說的那樣對users斜線。

3. 如果錯誤仍然存​​在，則可以從tomcat或IDE中打開應用程序主頁，以確保URL應該是哪種格式。