JAVA开发第一个Springboot WebApi项目

一、创建项目

1、用IDEA新建一个SpringBoot项目

注意JDK与Java版本的匹配，如果想选择jdk低版本，先要更改服务器URL：start.aliyun.com

2、添加依赖

（1）、Lombok
（2）、Spring Web
（3）、Mybatis Framework
（4）、MySqlDriver

项目中的配置 pom.xml 如下

<?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><groupId>com.springboot</groupId><artifactId>Chapter13</artifactId><version>0.0.1-SNAPSHOT</version><name>Chapter13</name><description>Chapter13</description><properties><java.version>11</java.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><spring-boot.version>2.6.13</spring-boot.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.2.2</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--Swagger2--><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger2</artifactId><exclusions><!--swagger2.92默认依赖1.5.0版本的models和annotations排除掉此版本，引入一个其他版本，不让项目启动时未报Illegal DefaultValue null for parameter type integer的警告--><exclusion><groupId>io.swagger</groupId><artifactId>swagger-models</artifactId></exclusion><exclusion><groupId>io.swagger</groupId><artifactId>swagger-annotations</artifactId></exclusion></exclusions><version>2.9.2</version></dependency><dependency><groupId>io.swagger</groupId><artifactId>swagger-models</artifactId><version>1.5.22</version></dependency><dependency><groupId>io.swagger</groupId><artifactId>swagger-annotations</artifactId><version>1.5.22</version></dependency><!--Swagger-UI--><!--访问路径：http://localhost:8080/swagger-ui.html--><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger-ui</artifactId><version>2.9.2</version></dependency><!--swaggerui  几个自定义界面方便查看接口--><!--访问路径：http://localhost:8080/doc.html--><dependency><groupId>com.github.xiaoymin</groupId><artifactId>swagger-bootstrap-ui</artifactId><version>1.9.5</version></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.boot