如何解决：“出现意外错误(type=Not Found，status=404)”
如何解决：“出现意外错误(type=Not Found，status=404)”
提问于 2019-11-14 04:18:10
我正在使用这个控制器启动一个spring boot应用程序。
@RestController
@RequestMapping({"/api"})
public class ProduitImmobilierController {
Logger logger = LoggerFactory.getLogger(ProduitImmobilierController.class);
@Autowired
private ProduitImmobilierService produitImmobilierService;
@RequestMapping(value = "/produitimmobilier/all/{pageSize}/{page}",
method = RequestMethod.GET,
produces = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE},
consumes = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE})
public @ResponseBody List<ProduitImmobilierDTO> findAll(@PathVariable("pageSize") int pageSize, @PathVariable("page") int page){
logger.info("CONTROLLER PRODUITIMMOBILIERSERVICE CA PASSE");
return produitImmobilierService.findAll(pageSize, page);
}我检查应用程序是否正在监听端口8080我尝试在firefox上使用此URL访问此控制器
http://localhost:8080/api/produitimmobilier/all/5/1
我得到了这个错误
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Wed Nov 13 20:48:53 CET 2019
There was an unexpected error (type=Not Found, status=404).
No message available这是项目树
我怎么解决它呢？
我添加了pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demoImmobilierBack</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demoImmobilierBack</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>
<dependency>
<groupId>org.hibernate.hql</groupId>
<artifactId>hibernate-hql-parser</artifactId>
<version>1.5.0.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.persistence/javax.persistence-api -->
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>javax.persistence-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>test</scope>
<!-- <version>1.4.194</version> -->
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</repository>
<repository>
<id>org.jboss.repository.releases</id>
<name>JBoss Maven Release Repository</name>
<url>https://repository.jboss.org/nexus/content/repositories/releases</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>当我使用以下url点击应用程序时：http://localhost:8080/api/produitimmobilier/all/5/1
2019-11-14 12:20:58.770 INFO 2998 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-11-14 12:20:58.770 INFO 2998 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2019-11-14 12:20:58.787 INFO 2998 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 17 msStack Overflow用户
发布于 2019-11-15 04:38:16
我更改了包含main方法的类，添加了@ComponentScan，如下所示
package com.example.demoImmobilierBack;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan({"com.example.demoImmobilierBack.service","com.example.demoImmobilierBack", "com.example.demoImmobilierBack.controller", "com.example.demoImmobilierBack.repository"})
public class DemoImmobilierBackApplication {
public static void main(String[] args) {
SpringApplication.run(DemoImmobilierBackApplication.class, args);
}
}当我点击url时：
http://localhost:8080/api/produitimmobilier/all/5/1并且我收到了以下错误
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Nov 14 21:11:26 CET 2019
There was an unexpected error (type=Not Acceptable, status=406).
Could not find acceptable representation我读到了这篇关于错误406的文章
The 406 Not Acceptable is an HTTP response status code indicating that the client has requested a response using Accept- headers that the server is unable to fulfill. This is typically a result of the user agent (i.e. browser) specifying an acceptable character set (via Accept-Charset), language (via Accept-Language), and so forth that should be responded with, and the server being unable to provide such a response.我在firefox上工作，并尝试使用User-Agent Switcher更改用户代理，以获得正确的响应，即json响应，但没有成功
我有另一个问题。当我试图在我的应用程序中添加另一个具有另一个服务的控制器时，即
package com.example.demoImmobilierBack.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.example.demoImmobilierBack.dto.UserDTO;
import com.example.demoImmobilierBack.dto.UserDTOWithMesssage;
import com.example.demoImmobilierBack.service.UserService;
@RestController
@RequestMapping({"/api/user"})
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "/login",
method = RequestMethod.POST,
produces = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE},
consumes = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE})
public @ResponseBody UserDTOWithMesssage login(@RequestBody UserDTO userDTO){
UserDTOWithMesssage userDTOWithMesssage = new UserDTOWithMesssage();
String message = userService.checkIfUserExistsAndGoodCredential(userDTO);
if (message.isEmpty()) {
userDTO = userService.findByEmailAndPassword(userDTO.getEmail(), userDTO.getPassword());
userDTO.setPassword("");
} else {
userDTOWithMesssage.setMessage(message);
}
return userDTOWithMesssage;
}
@RequestMapping(value = "/save",
method = RequestMethod.POST,
produces = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE},
consumes = {"text/plain;charset=UTF-8", MediaType.APPLICATION_JSON_VALUE})
public @ResponseBody UserDTOWithMesssage save(@RequestBody UserDTO userDTO){
UserDTOWithMesssage userDTOWithMesssage = new UserDTOWithMesssage();
String message = userService.checkEmailAndPasswordAndPasswordConfirm(userDTO);
if (message.isEmpty()) {
UserDTO userDTOSaved = userService.save(userDTO);
userDTOWithMesssage.setUserDTO(userDTOSaved);
userDTOWithMesssage.setMessage(message);
} else {
userDTOWithMesssage.setUserDTO(userDTO);
userDTOWithMesssage.setMessage("");
}
return userDTOWithMesssage;
}
}当我启动应用程序时，我得到了以下错误，就好像无法扫描UserService一样
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userService in com.example.demoImmobilierBack.controller.UserController required a bean of type 'com.example.demoImmobilierBack.service.UserService' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'com.example.demoImmobilierBack.service.UserService' in your configuration.下面是树形层次结构
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/58844957
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