错误 404 - 使用@RestController 获取请求 - SpringBoot
Error 404 - Get request using @RestController - SpringBoot
是的，有很多关于它的问题，但每个案例都是独一无二的。
objective 是编写一个简单的应用程序来对实体 Product 进行 CRUD 操作，使用：Controller、Model 和 Repository。
树：
+- com.teste
+- controller
| +- ProductController.java
+- model
| +- Product.java
+- repository
| +- ProductRepository.java
+- SpringEsApplication.java
ProductController.java
@RestController
//@RequestMapping(value="/product") // When try it, not works too (same error).
public class ProductController {
@Autowired
private ProductRepository productRepository;
@PostMapping("/saveProduct")
public long saveProduct(@RequestBody List<Product> products) {
productRepository.saveAll(products);
return productRepository.count();
}
@GetMapping("/findAllProducts")
public Iterable<Product> findAllProducts() {
return productRepository.findAll();
}
@GetMapping("/findProductByCode")
public List<Product> findProductByCode(@PathVariable String code) {
return productRepository.findByCode(code);
}
}
Product.java
@Document(indexName = "product_index")
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Product {
@Id
private String id;
private String name;
private String code;
private double price;
}
ProductRepository.java
@Repository
public interface ProductRepository extends CrudRepository<Product,String> {
List<Product> findByCode(String code);
}
SpringEsApplication.java
@SpringBootApplication
@ComponentScan(basePackages = {"com.teste.repository"})
public class SpringEsApplication {
public static void main(String[] args) {
SpringApplication.run(SpringEsApplication.class, args);
}
}
邮递员 GET 请求
GET 请求：
http://localhost:8080/findAllProducts
回复：
{
"timestamp": "2019-09-18T14:10:38.305+0000",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/findAllProducts"
}
即使没有数据，它也应该return一些东西。
控制台日志开始
:: Spring Boot :: (v2.1.8.RELEASE)
2019-09-18 11:16:34.061 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : Starting SpringEsApplication on CTDDELL5JVV862 with PID 4764 (started by augusto.cadini in C:\Users\augusto.cadini\Desktop\Spring ElasticSearch projects\spring-es)
2019-09-18 11:16:34.069 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : No active profile set, falling back to default profiles: default
2019-09-18 11:16:34.193 INFO 4764 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2019-09-18 11:16:34.193 INFO 4764 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2019-09-18 11:16:34.774 INFO 4764 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-09-18 11:16:34.829 INFO 4764 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 51ms. Found 2 repository interfaces.
2019-09-18 11:16:35.516 INFO 4764 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-09-18 11:16:35.544 INFO 4764 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-09-18 11:16:35.544 INFO 4764 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.24]
2019-09-18 11:16:35.671 INFO 4764 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-09-18 11:16:35.672 INFO 4764 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1479 ms
2019-09-18 11:16:35.949 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : no modules loaded
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.index.reindex.ReindexPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.join.ParentJoinPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.percolator.PercolatorPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.script.mustache.MustachePlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.transport.Netty4Plugin]
2019-09-18 11:16:36.901 INFO 4764 --- [ restartedMain] o.s.d.e.c.TransportClientFactoryBean : Adding transport node : 192.168.99.100:9300
2019-09-18 11:16:37.260 INFO 4764 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2019-09-18 11:16:37.572 INFO 4764 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-09-18 11:16:37.956 INFO 4764 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-09-18 11:16:37.957 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : Started SpringEsApplication in 4.838 seconds (JVM running for 5.522)
从主 class.
中删除 @ComponentScan(basePackages = {"com.teste.repository"})
您的情况不需要。
当您提供 @ComponentScan 时，Spring 引擎将仅扫描您提供的那些包。
@ComponentScan 需要提供 packages/classes.
的自定义扫描
Person 标识符是 Long 类型，因此存储库应该扩展 CrudRepository<Product, Long> 而不是 CrudRepository<Product, String>。
接下来，rest 控制器在 "com.teste.repository" 包之外。您可以删除 @ComponentScan 注释，spring 将找到控制器。
问题出在您的 @ComponentScan 上。默认情况下 Spring 引导扫描从您的 SpringApplication.java 位置开始的所有包。您现在已经覆盖了它并要求容器仅扫描 repository。删除此行。相反，使用 @EnableMongoRepositories
是的，有很多关于它的问题，但每个案例都是独一无二的。
objective 是编写一个简单的应用程序来对实体 Product 进行 CRUD 操作，使用：Controller、Model 和 Repository。
树：
+- com.teste
+- controller
| +- ProductController.java
+- model
| +- Product.java
+- repository
| +- ProductRepository.java
+- SpringEsApplication.java
ProductController.java
@RestController
//@RequestMapping(value="/product") // When try it, not works too (same error).
public class ProductController {
@Autowired
private ProductRepository productRepository;
@PostMapping("/saveProduct")
public long saveProduct(@RequestBody List<Product> products) {
productRepository.saveAll(products);
return productRepository.count();
}
@GetMapping("/findAllProducts")
public Iterable<Product> findAllProducts() {
return productRepository.findAll();
}
@GetMapping("/findProductByCode")
public List<Product> findProductByCode(@PathVariable String code) {
return productRepository.findByCode(code);
}
}
Product.java
@Document(indexName = "product_index")
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Product {
@Id
private String id;
private String name;
private String code;
private double price;
}
ProductRepository.java
@Repository
public interface ProductRepository extends CrudRepository<Product,String> {
List<Product> findByCode(String code);
}
SpringEsApplication.java
@SpringBootApplication
@ComponentScan(basePackages = {"com.teste.repository"})
public class SpringEsApplication {
public static void main(String[] args) {
SpringApplication.run(SpringEsApplication.class, args);
}
}
邮递员 GET 请求
GET 请求：
http://localhost:8080/findAllProducts
回复：
{
"timestamp": "2019-09-18T14:10:38.305+0000",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/findAllProducts"
}
即使没有数据，它也应该return一些东西。
控制台日志开始
:: Spring Boot :: (v2.1.8.RELEASE)
2019-09-18 11:16:34.061 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : Starting SpringEsApplication on CTDDELL5JVV862 with PID 4764 (started by augusto.cadini in C:\Users\augusto.cadini\Desktop\Spring ElasticSearch projects\spring-es)
2019-09-18 11:16:34.069 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : No active profile set, falling back to default profiles: default
2019-09-18 11:16:34.193 INFO 4764 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2019-09-18 11:16:34.193 INFO 4764 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2019-09-18 11:16:34.774 INFO 4764 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-09-18 11:16:34.829 INFO 4764 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 51ms. Found 2 repository interfaces.
2019-09-18 11:16:35.516 INFO 4764 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-09-18 11:16:35.544 INFO 4764 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-09-18 11:16:35.544 INFO 4764 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.24]
2019-09-18 11:16:35.671 INFO 4764 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-09-18 11:16:35.672 INFO 4764 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1479 ms
2019-09-18 11:16:35.949 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : no modules loaded
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.index.reindex.ReindexPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.join.ParentJoinPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.percolator.PercolatorPlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.script.mustache.MustachePlugin]
2019-09-18 11:16:35.950 INFO 4764 --- [ restartedMain] o.elasticsearch.plugins.PluginsService : loaded plugin [org.elasticsearch.transport.Netty4Plugin]
2019-09-18 11:16:36.901 INFO 4764 --- [ restartedMain] o.s.d.e.c.TransportClientFactoryBean : Adding transport node : 192.168.99.100:9300
2019-09-18 11:16:37.260 INFO 4764 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2019-09-18 11:16:37.572 INFO 4764 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-09-18 11:16:37.956 INFO 4764 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-09-18 11:16:37.957 INFO 4764 --- [ restartedMain] com.teste.SpringEsApplication : Started SpringEsApplication in 4.838 seconds (JVM running for 5.522)
从主 class.
中删除@ComponentScan(basePackages = {"com.teste.repository"})
您的情况不需要。
当您提供 @ComponentScan 时，Spring 引擎将仅扫描您提供的那些包。
@ComponentScan 需要提供 packages/classes.
Person 标识符是 Long 类型，因此存储库应该扩展 CrudRepository<Product, Long> 而不是 CrudRepository<Product, String>。
接下来，rest 控制器在 "com.teste.repository" 包之外。您可以删除 @ComponentScan 注释，spring 将找到控制器。
问题出在您的 @ComponentScan 上。默认情况下 Spring 引导扫描从您的 SpringApplication.java 位置开始的所有包。您现在已经覆盖了它并要求容器仅扫描 repository。删除此行。相反，使用 @EnableMongoRepositories