SpringBoot连接PostgreSQL+MybatisPlus入门案例(代码详解)
更新时间:2024年07月24日 14:28:37 作者:小天博客
这篇文章主要介绍了SpringBoot连接PostgreSQL+MybatisPlus入门案例,本文通过实例代码图文相结合给大家介绍的非常详细,感兴趣的朋友跟随小编一起看看吧
项目结构
一、Java代码
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>org.example</groupId> <artifactId>jdservice</artifactId> <version>1.0-SNAPSHOT</version> <properties> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.0.3.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>2.0.3.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql --> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.6.0</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> </dependency> <!--mybatis‐plus的springboot支持--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.1.0</version> </dependency> </dependencies> </project>
controller层
package org.example.jd.controller; import org.example.jd.pojo.TUser; import org.example.jd.service.TUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; @CrossOrigin(origins = "http://localhost:8080") @RestController public class UserController { @Autowired private TUserService tUserService; @PostMapping("/api/userLogin") public String login(@RequestBody TUser tUser) { // 实际业务逻辑处理 String username = tUser.getUsername(); String password = tUser.getPassword(); // 这里可以进行用户名密码验证等操作 System.out.println("========Login successful====="); System.out.println(username + "," + password); return "Login successful"; // 返回登录成功信息或者其他响应 } @GetMapping("/api/getUserList") public List<TUser> getUserList() { List<TUser> tUserList = tUserService.getUserList(); return tUserList; } }
mapper层
package org.example.jd.mapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import org.example.jd.pojo.TUser; public interface TUserMapper extends BaseMapper<TUser> { //参数为实体类 }
pojo层
package org.example.jd.pojo; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import java.time.LocalDate; @Data @AllArgsConstructor @NoArgsConstructor @TableName("tuser") //指定数据库表 public class TUser { @TableId(value = "uid") //指定主键 private int uid; private String username; private String password; private int age; private String gender; private LocalDate birthday; private String address; }
service层
TUserService
package org.example.jd.service; import org.example.jd.pojo.TUser; import java.util.List; public interface TUserService { List<TUser> getUserList(); }
TUserServiceImp
package org.example.jd.service; import org.example.jd.mapper.TUserMapper; import org.example.jd.pojo.TUser; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class TUserServiceImp implements TUserService { @Autowired private TUserMapper tUserMapper; @Override public List<TUser> getUserList() { return tUserMapper.selectList(null); } }
Application启动类
package org.example.jd; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("org.example.jd.mapper") //扫描mapper层 public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
TUserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!--namespace是mapper层对应的接口名--> <mapper namespace="org.example.jd.mapper.TUserMapper"> <!--id是mapper层对应的接口名中对应的方法名--> <!-- <select id="myFindUserById" resultType="User">--> <!-- select *--> <!-- from tb_user--> <!-- where id = #{id}--> <!-- </select>--> </mapper>
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--设置驼峰匹配,MybatisPlus默认开启驼峰匹配--> <!-- <settings>--> <!-- <setting name="mapUnderscoreToCamelCase" value="true"/>--> <!-- </settings>--> </configuration>
application.yml配置文件
server: port: 8090 spring: datasource: url: jdbc:postgresql://localhost:5432/myjd username: postgres password: 123456 driver-class-name: org.postgresql.Driver #设置mybatis-plus mybatis-plus: config-location: classpath:mybatis/mybatis-config.xml #配置文件 mapper-locations: classpath:mybatis/mapper/*.xml #设置mapper层对应的接口对应的mapper.xml的路径 type-aliases-package: org.example.jd.pojo #设置别名,mapper.xml中resultType="org.example.jd.pojo.TUser"可省去包,即resultType="TUser" #开启自动驼峰映射,注意:配置configuration.map-underscore-to-camel-case则不能配置config-location,可写到mybatis-config.xml中 # configuration: # map-underscore-to-camel-case: true
二、SQL
/* Navicat Premium Data Transfer Source Server : myPgSQL Source Server Type : PostgreSQL Source Server Version : 160003 (160003) Source Host : localhost:5432 Source Catalog : myjd Source Schema : public Target Server Type : PostgreSQL Target Server Version : 160003 (160003) File Encoding : 65001 Date: 19/07/2024 22:15:18 */ -- ---------------------------- -- Table structure for tuser -- ---------------------------- DROP TABLE IF EXISTS "public"."tuser"; CREATE TABLE "public"."tuser" ( "uid" int4 NOT NULL, "username" varchar(255) COLLATE "pg_catalog"."default", "age" int4, "gender" varchar(1) COLLATE "pg_catalog"."default", "birthday" date, "address" varchar(255) COLLATE "pg_catalog"."default", "password" varchar(255) COLLATE "pg_catalog"."default" ) ; -- ---------------------------- -- Records of tuser -- ---------------------------- INSERT INTO "public"."tuser" VALUES (1, 'jack', 24, '男', '2021-10-19', '深圳', '123'); -- ---------------------------- -- Primary Key structure for table tuser -- ---------------------------- ALTER TABLE "public"."tuser" ADD CONSTRAINT "user_pkey" PRIMARY KEY ("uid");
三、运行
浏览器或者postman请求地址。
注意:浏览器只能测试get请求,如果有put、post、delete请使用postman测试。
http://localhost:8090/api/getUserList
到此这篇关于SpringBoot连接PostgreSQL+MybatisPlus入门案例的文章就介绍到这了,更多相关SpringBoot连接PostgreSQL内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!
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