springboot基本配置

我会带着你远行 2022-06-06 12:27 213阅读 0赞

1，开发工具idea，新建项目，添加web和mysql，创建数据库，创建表，配置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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <groupId>com.mysql</groupId>
       <artifactId>springcurd</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
       <name>springcurd</name>
       <description>Demo project for Spring Boot</description>
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>1.5.8.RELEASE</version>
          <relativePath/> 
       </parent>
       <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
          <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>
          </dependency>
       </dependencies>
       <build>
          <plugins>
             <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
          </plugins>
       </build>
    </project>

2，新建application.yml。

spring:
      datasource:
        url: jdbc:mysql://127.0.0.1:3306/springcurd?characterEncoding=utf8
        driver-class-name: com.mysql.jdbc.Driver
        username: root
        password: root
      jpa:
        database: mysql
        show-sql: true
        hibernate:
          naming:
            strategy: org.hibernate.cfg.ImprovedNamingStrategy
          ddl-auto: update

3，新建UserEntity。

package com.mysql.springcurd;
    
    import javax.persistence.*;
    
    @Entity
    @Table(name = "user")
    public class UserEntity {
    
        private Integer id;
        private String username;
        private String password;
        @Id
        @GeneratedValue
        public Integer getId() {
            return id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
        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;
        }
    }

4，新建接口UserJPA。

package com.mysql.springcurd;
    
    import org.springframework.data.jpa.repository.JpaRepository;
    
    public interface UserJPA extends JpaRepository<UserEntity,Integer> {
    
    }

5，新建UserController测试。

package com.mysql.springcurd;
    
    import org.omg.CORBA.PUBLIC_MEMBER;
    import org.omg.CORBA.Request;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    @RestController
    public class UserController {
        @Autowired UserJPA userJPA;
        @RequestMapping(value = "/query")
        public List<UserEntity> query(){
            return userJPA.findAll();
        }
        @RequestMapping(value = "/delete")
        public List<UserEntity> delete(Integer id){
            userJPA.delete(id);
            return userJPA.findAll();
        }
        @RequestMapping(value = "/add")
        public List<UserEntity> add(UserEntity userEntity){
            userJPA.save(userEntity);
    return  userJPA.findAll();
        }
        @RequestMapping(value = "/update")
        public List<UserEntity> update(UserEntity user){
            userJPA.saveAndFlush(user);
            return userJPA.findAll();
        }
    }

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