When I am hitting url(http://localhost:8080/pjt/samples) in Postman for json data,it shows the following error.
{
"timestamp": "2020-05-17T10:54:26.705+0000",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/pjt/samples"
}
1)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>2.2.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>samplepjt</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>samplepjt</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2)型号:
package model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "samples")
public class Sample {
private Long id ;
private String name;
private String city;
public Sample(String name, String city) {
this.name = name;
this.city = city;
}
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name = "name", nullable = false)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "city", nullable = false)
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
@Override
public String toString() {
return "Sample [id=" + id + ",name=" + name + ", city=" + city + "]";
}
}
3)资料库
package repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import model.Sample;
@Repository
public interface SampleRepository extends JpaRepository<Sample,Long>{
}
4)控制器
package controller;
import java.util.List;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import model.Sample;
import repository.SampleRepository;
@RestController
@RequestMapping("/pjt")
public class SampleController {
@Autowired
private SampleRepository sampleRepository;
@PostMapping("/samples")
public Sample createSample(@Valid @RequestBody Sample sample) {
return sampleRepository.save(sample);
}
@GetMapping("/samples")
public List<Sample> getAllSample() {
return sampleRepository.findAll();
}
}
5)主要功能
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SamplepjtApplication {
public static void main(String[] args) {
SpringApplication.run(SamplepjtApplication.class, args);
}
}
6)application.properties
spring.datasource.url = jdbc:mysql://localhost:3306/sampledb?useSSL=false
spring.datasource.username = root
spring.datasource.password = dali
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.hibernate.ddl-auto = update
。 ____ _ __ _ _ _ / \ /'__ _()_ __ __ _ \ \ \ \ \ (()_ |'_ |'| |'/`| \ \ \ \ \ \ /)| |)| | | | | || (| |)))) '| ____ | 。|| ||| | __,| / / / / ======== | _ | ============= | ___ / = ////// :: Spring Boot ::(v2.2.7.RELEASE)
2020-05-17 16:47:56.159信息3688 --- [main] com.example.demo.SamplepjtApplication:未设置活动配置文件,回退到默认配置文件:默认 2020-05-17 16:47:58.395信息3688-[[main] .s.d.r.c.RepositoryConfigurationDelegate:以DEFAULT模式引导Spring Data JPA存储库。 2020-05-17 16:47:58.476信息3688--[main] .s.d.r.c.RepositoryConfigurationDelegate:完成Spring数据存储库的扫描时间为49ms。找到0个JPA存储库接口。 2020-05-17 16:48:00.119 INFO 3688 --- [main] o.s.b.w.embedded.tomcat.TomcatWebServer:使用端口初始化的Tomcat:8081(http) 2020-05-17 16:48:00.142信息3688 --- [main] o.apache.catalina.core.StandardService:启动服务[Tomcat] 2020-05-17 16:48:00.143 INFO 3688 --- [main] org.apache.catalina.core.StandardEngine:启动Servlet引擎:[Apache Tomcat / 9.0.34] 2020-05-17 16:48:00.496信息3688 --- [main] o.a.c.c.C. [Tomcat]。[localhost]。[/]:初始化Spring嵌入式WebApplicationContext 2020-05-17 16:48:00.497信息3688-[[main] o.s.web.context.ContextLoader:根WebApplicationContext:初始化在4199毫秒内完成 2020-05-17 16:48:00.980信息3688-[[主] o.hibernate.jpa.internal.util.LogHelper:HHH000204:处理PersistenceUnitInfo [名称:默认] 2020-05-17 16:48:01.156信息3688 --- [main] org.hibernate.Version:HHH000412:Hibernate ORM核心版本5.4.15.Final 2020-05-17 16:48:01.579信息3688 --- [main] o.hibernate.annotations.common.Version:HCANN000001:Hibernate Commons注释{5.1.0.Final} 2020-05-17 16:48:01.898信息3688-[[主] com.zaxxer.hikari.HikariDataSource:HikariPool-1-正在启动... 2020-05-17 16:48:02.714信息3688-[main] com.zaxxer.hikari.HikariDataSource:HikariPool-1-开始完成。 2020-05-17 16:48:02.771信息3688--[main] org.hibernate.dialect.Dialect:HHH000400:使用方言:org.hibernate.dialect.MySQL5InnoDBDialect 2020-05-17 16:48:03.635信息3688-[main] o.h.e.t.j.p.i.JtaPlatformInitiator:HHH000490:使用JtaPlatform实现:[org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform] 2020-05-17 16:48:03.660信息3688-[主] j.LocalContainerEntityManagerFactoryBean:持久性单元“默认”的已初始化JPA EntityManagerFactory 2020-05-17 16:48:04.042 WARN 3688 --- [main] JpaBaseConfiguration $ JpaWebConfiguration:默认情况下启用spring.jpa.open-in-view。因此,可以在视图渲染期间执行数据库查询。明确配置spring.jpa.open-in-view以禁用此警告 2020-05-17 16:48:04.388信息3688 --- [main] o.s.s.concurrent.ThreadPoolTaskExecutor:正在初始化ExecutorService'applicationTaskExecutor' 2020-05-17 16:48:04.845信息3688 --- [main] o.s.b.w.embedded.tomcat.TomcatWebServer:Tomcat在具有上下文路径的端口:8081(http)上启动 2020-05-17 16:48:04.849信息3688-[[main] com.example.demo.SamplepjtApplication:在9.906秒内启动SamplepjtApplication(JVM运行12.757) 2020-05-17 16:48:13.367信息3688-[nio-8081-exec-2] o.a.c.c.C. [Tomcat]。[localhost]。[/]:初始化Spring DispatcherServlet'dispatcherServlet' 2020-05-17 16:48:13.369信息3688-[nio-8081-exec-2] o.s.web.servlet.DispatcherServlet:初始化Servlet'dispatcherServlet' 2020-05-17 16:48:13.395信息3688-[nio-8081-exec-2] o.s.web.servlet.DispatcherServlet:25毫秒内完成初始化
谁能帮我解决此问题?