一、环境准备：
1. Windows 10
2. Maven 3.X
3. InterlliJ IDEA 2019
4. JDK 13（JDK1.8以上）
二、项目结构图：
三、详细代码部分：
1. Maven的pom.xml文件
<?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>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.study.module</groupId> <artifactId>mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <name>mybatis</name> <description>Demo project for Spring Boot: ORM Framework Mybatis</description> <properties> <java.version>1.8</java.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>2.1.2</version> </dependency> <!--热部署--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <!--MySQL数据库连接--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--阿里巴巴连接池--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.22</version> </dependency> <!--实体类:Lombok--> <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> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <!--swagger2 RESTful API接口文档--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.7.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
2 application.yaml 项目配置文件
server: port: 8089 spring: datasource: url: jdbc:mysql://127.0.0.1:3306/zero?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC username: root password: root123456 type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.cj.jdbc.Driver mybatis: mapper-locations: classpath:/mapper/*Dao.xml typeAliasesPackage: com.study.module.mybatis.entity
3. Mapper文件
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 3 <mapper namespace="com.study.module.mybatis.dao.UserDao"> 4 5 <resultMap type="com.study.module.mybatis.entity.User" id="UserMap"> 6 <result property="id" column="id" jdbcType="INTEGER"/> 7 <result property="name" column="name" jdbcType="VARCHAR"/> 8 <result property="password" column="password" jdbcType="VARCHAR"/> 9 </resultMap> 10 11 <!--查询单个--> 12 <select id="queryById" resultMap="UserMap"> 13 select 14 id, name, password 15 from zero.user 16 where id = #{id} 17 </select> 18 19 <!--查询指定行数据--> 20 <select id="queryAllByLimit" resultMap="UserMap"> 21 select 22 id, name, password 23 from zero.user 24 limit #{offset}, #{limit} 25 </select> 26 27 <!--通过实体作为筛选条件查询--> 28 <select id="queryAll" resultMap="UserMap"> 29 select 30 id, name, password 31 from zero.user 32 <where> 33 <if test="id != null"> 34 and id = #{id} 35 </if> 36 <if test="name != null and name != ''"> 37 and name = #{name} 38 </if> 39 <if test="password != null and password != ''"> 40 and password = #{password} 41 </if> 42 </where> 43 </select> 44 45 <!--新增所有列--> 46 <insert id="insert" keyProperty="id" useGeneratedKeys="true"> 47 insert into zero.user(name, password) 48 values (#{name}, #{password}) 49 </insert> 50 51 <!--通过主键修改数据--> 52 <update id="update"> 53 update zero.user 54 <set> 55 <if test="name != null and name != ''"> 56 name = #{name}, 57 </if> 58 <if test="password != null and password != ''"> 59 password = #{password}, 60 </if> 61 </set> 62 where id = #{id} 63 </update> 64 65 <!--通过主键删除--> 66 <delete id="deleteById"> 67 delete from zero.user where id = #{id} 68 </delete> 69 70 </mapper>
4. Dao 数据库操作文件
1 package com.study.module.mybatis.dao; 2 3 import com.study.module.mybatis.entity.User; 4 import org.apache.ibatis.annotations.Mapper; 5 import org.apache.ibatis.annotations.Param; 6 7 import java.util.List; 8 9 /** 10 * 用户表（用来测试代码生成插件EasyCode）(User)表数据库访问层 11 * 12 * @author makejava 13 * @since 2020-04-11 22:48:27 14 */ 15 @Mapper 16 public interface UserDao { 17 18 /** 19 * 通过ID查询单条数据 20 * 21 * @param id 主键 22 * @return 实例对象 23 */ 24 User queryById(Integer id); 25 26 /** 27 * 查询指定行数据 28 * 29 * @param offset 查询起始位置 30 * @param limit 查询条数 31 * @return 对象列表 32 */ 33 List<User> queryAllByLimit(@Param("offset") int offset, @Param("limit") int limit); 34 35 36 /** 37 * 通过实体作为筛选条件查询 38 * 39 * @param user 实例对象 40 * @return 对象列表 41 */ 42 List<User> queryAll(User user); 43 44 /** 45 * 新增数据 46 * 47 * @param user 实例对象 48 * @return 影响行数 49 */ 50 int insert(User user); 51 52 /** 53 * 修改数据 54 * 55 * @param user 实例对象 56 * @return 影响行数 57 */ 58 int update(User user); 59 60 /** 61 * 通过主键删除数据 62 * 63 * @param id 主键 64 * @return 影响行数 65 */ 66 int deleteById(Integer id); 67 68 }
实体类User
1 package com.study.module.mybatis.entity; 2 3 import io.swagger.annotations.ApiModel; 4 import io.swagger.annotations.ApiModelProperty; 5 6 import java.io.Serializable; 7 8 /** 9 * 用户表（用来测试代码生成插件EasyCode）(User)实体类 10 * 11 * @author makejava 12 * @since 2020-04-11 22:45:37 13 * <pre> 14 * `@ApiModel` 参数Model对应的接口文档<br/> 15 * `@ApiModelProperty` 参数Model对应属性的接口文档描述 16 * <pre/> 17 */ 18 @ApiModel(value = "用户信息") 19 public class User implements Serializable { 20 private static final long serialVersionUID = -48812651257143828L; 21 /** 22 * 用户主键ID 23 */ 24 @ApiModelProperty("用户ID") 25 private Integer id; 26 /** 27 * 用户名称 28 */ 29 @ApiModelProperty("用户名称") 30 private String name; 31 /** 32 * 用户密码 33 */ 34 @ApiModelProperty("用户登录密码") 35 private String password; 36 37 38 public Integer getId() { 39 return id; 40 } 41 42 public void setId(Integer id) { 43 this.id = id; 44 } 45 46 public String getName() { 47 return name; 48 } 49 50 public void setName(String name) { 51 this.name = name; 52 } 53 54 public String getPassword() { 55 return password; 56 } 57 58 public void setPassword(String password) { 59 this.password = password; 60 } 61 62 @Override 63 public String toString() { 64 return "User{" + 65 "id=" + id + 66 ", name='" + name + '\'' + 67 ", password='" + password + '\'' + 68 '}'; 69 } 70 71 public User() { 72 } 73 74 public User(Integer id, String name, String password) { 75 this.id = id; 76 this.name = name; 77 this.password = password; 78 } 79 }
5. Service和ServiceImpl 业务层文件
① service
1 package com.study.module.mybatis.service; 2 3 import com.study.module.mybatis.entity.User; 4 import java.util.List; 5 6 /** 7 * 用户表（用来测试代码生成插件EasyCode）(User)表服务接口 8 * 9 * @author makejava 10 * @since 2020-04-11 22:48:29 11 */ 12 public interface UserService { 13 14 /** 15 * 通过ID查询单条数据 16 * 17 * @param id 主键 18 * @return 实例对象 19 */ 20 User queryById(Integer id); 21 22 /** 23 * 查询多条数据 24 * 25 * @param offset 查询起始位置 26 * @param limit 查询条数 27 * @return 对象列表 28 */ 29 List<User> queryAllByLimit(int offset, int limit); 30 31 /** 32 * 新增数据 33 * 34 * @param user 实例对象 35 * @return 实例对象 36 */ 37 User insert(User user); 38 39 /** 40 * 修改数据 41 * 42 * @param user 实例对象 43 * @return 实例对象 44 */ 45 User update(User user); 46 47 /** 48 * 通过主键删除数据 49 * 50 * @param id 主键 51 * @return 是否成功 52 */ 53 boolean deleteById(Integer id); 54 55 }
② serviceImpl
1 package com.study.module.mybatis.service.impl; 2 3 import com.study.module.mybatis.entity.User; 4 import com.study.module.mybatis.dao.UserDao; 5 import com.study.module.mybatis.service.UserService; 6 import org.springframework.stereotype.Service; 7 8 import javax.annotation.Resource; 9 import java.util.List; 10 11 /** 12 * 用户表（用来测试代码生成插件EasyCode）(User)表服务实现类 13 * 14 * @author makejava 15 * @since 2020-04-11 22:48:29 16 */ 17 @Service("userService") 18 public class UserServiceImpl implements UserService { 19 @Resource 20 private UserDao userDao; 21 22 /** 23 * 通过ID查询单条数据 24 * 25 * @param id 主键 26 * @return 实例对象 27 */ 28 @Override 29 public User queryById(Integer id) { 30 return this.userDao.queryById(id); 31 } 32 33 /** 34 * 查询多条数据 35 * 36 * @param offset 查询起始位置 37 * @param limit 查询条数 38 * @return 对象列表 39 */ 40 @Override 41 public List<User> queryAllByLimit(int offset, int limit) { 42 return this.userDao.queryAllByLimit(offset, limit); 43 } 44 45 /** 46 * 新增数据 47 * 48 * @param user 实例对象 49 * @return 实例对象 50 */ 51 @Override 52 public User insert(User user) { 53 this.userDao.insert(user); 54 return user; 55 } 56 57 /** 58 * 修改数据 59 * 60 * @param user 实例对象 61 * @return 实例对象 62 */ 63 @Override 64 public User update(User user) { 65 this.userDao.update(user); 66 return this.queryById(user.getId()); 67 } 68 69 /** 70 * 通过主键删除数据 71 * 72 * @param id 主键 73 * @return 是否成功 74 */ 75 @Override 76 public boolean deleteById(Integer id) { 77 return this.userDao.deleteById(id) > 0; 78 } 79 }
6. Controller 控制层文件
① 第一个Controller
1 package com.study.module.mybatis.controller; 2 3 import com.study.module.mybatis.entity.User; 4 import com.study.module.mybatis.service.UserService; 5 import io.swagger.annotations.Api; 6 import io.swagger.annotations.ApiImplicitParam; 7 import io.swagger.annotations.ApiImplicitParams; 8 import io.swagger.annotations.ApiOperation; 9 import org.springframework.web.bind.annotation.*; 10 import springfox.documentation.annotations.ApiIgnore; 11 12 import javax.annotation.Resource; 13 import java.util.Collections; 14 import java.util.HashMap; 15 import java.util.List; 16 import java.util.Map; 17 18 /** 19 * 用户表（用来测试代码生成插件EasyCode）(User)表控制层 20 * <pre> 21 * swagger2接入SpringBoot的学习示例网址：https://www.jb51.net/article/143533.htm 22 * 1. 此controller访问的地址：例如 http://localhost:8089/user/selectAll 23 * 2. 当前Controller的swaggerUI2文档：http://localhost:8089/swagger-ui.html#/ 24 * <pre/> 25 * @author Drew 26 * @since 2020-04-11 22:48:30 27 */ 28 @Api(tags = "1.用户信息CURD操作", value = "") 29 @RestController 30 @RequestMapping("user") 31 public class UserController { 32 /** 33 * 服务对象 34 */ 35 @Resource 36 private UserService userService; 37 38 /** 39 * 通过主键查询单条数据 {`@ApiIgnore` 使用该注解忽略这个API【即：在 swagger UI 文档中不会显示此接口】} 40 * 41 * @param id 主键 42 * @return 单条数据 43 */ 44 @ApiIgnore 45 @GetMapping("selectOne/{id}") 46 public User selectOne(@PathVariable("id") Integer id) { 47 return this.userService.queryById(id); 48 } 49 50 @ApiOperation(value = "获取所有用户", notes = "get all user limit 10") 51 @RequestMapping(value = "/selectAll", method = RequestMethod.GET) 52 public List<User> selectAll() { 53 return this.userService.queryAllByLimit(0, 10); 54 } 55 56 @ApiOperation(value = "根据用户ID查询用户信息", notes = "get user by ID") 57 @ApiImplicitParam(name = "id", value = "ID", required = true, dataType = "Integer", paramType = "path", 58 defaultValue = "1") 59 @RequestMapping(value = "selectById/{id}", method = RequestMethod.GET) 60 public User selectById(@PathVariable("id") Integer id) { 61 return this.userService.queryById(id); 62 } 63 64 /** 65 * ====================== >>>> 更行指定用户的信息 66 * 67 * @return 所有的用户信息 68 */ 69 private Map<Integer, User> userData() { 70 Map<Integer, User> users = Collections.synchronizedMap(new HashMap<>(100)); 71 List<User> userList = this.userService.queryAllByLimit(0, 100); 72 for (User user : userList) { 73 users.put(user.getId(), user); 74 } 75 return users; 76 } 77 78 @ApiOperation(value = "更新指定用户ID信息", notes = "update user info by id.") 79 @ApiImplicitParams({ 80 @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Integer", paramType = "path"), 81 @ApiImplicitParam(name = "user", value = "用户实体信息", required = true, dataType = "User") 82 }) 83 @RequestMapping(value = "/{id}", method = RequestMethod.PUT) 84 public String updateUser(@PathVariable Integer id, @RequestBody User user) { 85 Map<Integer, User> users = this.userData(); 86 System.out.println("【更新前】所有的用户信息：\n" + users); 87 User user1 = users.get(id); 88 user1.setName(user.getName()); 89 user1.setPassword(user.getPassword()); 90 users.put(id, user1); 91 System.out.println("【更新后】所有的用户信息：\n" + users); 92 return "success"; 93 } 94 95 @ApiOperation(value = "删除用户", notes = "根据url的ID，来删除指定的用户") 96 @ApiImplicitParam(name = "id", value = "用户ID", required = true, defaultValue = "2", dataType = "Integer", 97 paramType = "path") 98 @RequestMapping(value = "/{id}", method = RequestMethod.DELETE) 99 public String deleteUser(@PathVariable(value = "id") Integer id) { 100 Map<Integer, User> users = this.userData(); 101 System.out.println("【删除前】所有的用户信息：\n" + users); 102 users.remove(id); 103 System.out.println("【删除后】所有的用户信息：\n" + users); 104 return "success"; 105 } 106 107 @ApiIgnore 108 @RequestMapping(value = "/hi", method = RequestMethod.GET) 109 public String jsonTest() { 110 return " hi you!"; 111 } 112 113 }
② 第二个controller
1 package com.study.module.mybatis.controller; 2 3 import com.study.module.mybatis.entity.User; 4 import io.swagger.annotations.Api; 5 import io.swagger.annotations.ApiImplicitParam; 6 import io.swagger.annotations.ApiImplicitParams; 7 import io.swagger.annotations.ApiOperation; 8 import org.springframework.web.bind.annotation.*; 9 10 import java.util.*; 11 12 /** 13 * 用户表（用来测试代码生成插件EasyCode）(User)表控制层 14 * <pre> 15 * swagger2接入SpringBoot的学习示例网址：https://www.jb51.net/article/143533.htm 16 * 1. 此controller访问的地址：例如 http://localhost:8089/users 17 * 2. 当前Controller的swaggerUI2文档：http://localhost:8089/swagger-ui.html#/ 18 * <pre/> 19 * @author Drew 20 * @since 2020-04-19 09:00:45 21 */ 22 @Api(tags = "2.用户信息CURD操作", value = "") 23 @RestController 24 @RequestMapping(value = "/users") 25 public class UserDetailController { 26 /** 27 * 数据准备 28 */ 29 static Map<Integer, User> users = Collections.synchronizedMap(new HashMap<>()); 30 31 static { 32 users.put(1, new User(1, "drew1", "drew1")); 33 users.put(2, new User(2, "drew2", "drew2")); 34 users.put(3, new User(3, "drew3", "drew3")); 35 users.put(4, new User(4, "drew4", "drew4")); 36 users.put(5, new User(5, "drew5", "drew5")); 37 users.put(6, new User(6, "drew6", "drew6")); 38 } 39 40 @ApiOperation(value = "获取用户列表", notes = "获取所有的用户信息") 41 @RequestMapping(value = {""}, method = RequestMethod.GET) 42 public List<User> getUserList() { 43 return new ArrayList<>(users.values()); 44 } 45 46 @ApiOperation(value = "创建用户", notes = "根据User对象创建用户") 47 @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User") 48 @RequestMapping(value = "", method = RequestMethod.POST) 49 public String postUser(@RequestBody User user) { 50 users.put(user.getId(), user); 51 return "success"; 52 } 53 54 @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息") 55 @ApiImplicitParam(name = "id", defaultValue = "3", value = "用户ID", required = true, dataType = "Integer", paramType = "path") 56 @RequestMapping(value = "/{id}", method = RequestMethod.GET) 57 public User getUser(@PathVariable Integer id) { 58 return users.get(id); 59 } 60 61 @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息") 62 @ApiImplicitParams({ 63 @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Integer", paramType = "path"), 64 @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User") 65 }) 66 @RequestMapping(value = "/{id}", method = RequestMethod.PUT) 67 public String putUser(@PathVariable Integer id, @RequestBody User user) { 68 User u = new User(id, user.getName(), user.getPassword()); 69 System.out.println("【更新前】所有的用户信息：\n" + users); 70 users.put(id, u); 71 System.out.println("【更新后】所有的用户信息：\n" + users); 72 return "success"; 73 } 74 75 @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象") 76 @ApiImplicitParam(name = "id", defaultValue = "1", value = "用户ID", required = true, dataType = "Integer", paramType = "path") 77 @RequestMapping(value = "/{id}", method = RequestMethod.DELETE) 78 public String deleteUser(@PathVariable Integer id) { 79 System.out.println("【删除前】所有的用户信息：\n" + users); 80 users.remove(id); 81 System.out.println("【删除后】所有的用户信息：\n" + users); 82 return "success"; 83 } 84 }
7. Swagger 配置类
1 package com.study.module.mybatis.config; 2 3 import org.springframework.context.annotation.Bean; 4 import org.springframework.context.annotation.Configuration; 5 import springfox.documentation.builders.ApiInfoBuilder; 6 import springfox.documentation.builders.PathSelectors; 7 import springfox.documentation.builders.RequestHandlerSelectors; 8 import springfox.documentation.service.ApiInfo; 9 import springfox.documentation.service.Contact; 10 import springfox.documentation.spi.DocumentationType; 11 import springfox.documentation.spring.web.plugins.Docket; 12 import springfox.documentation.swagger2.annotations.EnableSwagger2; 13 14 /** 15 * Swagger启动配置类 16 * 17 * @author Drew 18 * @date 2020年4月19日 09点00分 19 */ 20 @Configuration 21 @EnableSwagger2 22 public class SwaggerConfiguration { 23 24 /** 25 * swagger2的配置文件，这里可以配置swagger2的一些基本的内容，比如扫描的包等等 26 * 27 * @return 配型swagger2接口文档的摘要 28 */ 29 @Bean 30 public Docket createRestfulApi() { 31 return new Docket(DocumentationType.SWAGGER_2) 32 //调用apiInfo方法,创建一个ApiInfo实例,里面是展示在文档页面信息内容 33 .apiInfo(apiInfo()) 34 .pathMapping("/") 35 .select() 36 //暴露接口地址的包路径 例如：com.lance.learn.springbootswagger.controller 37 .apis(RequestHandlerSelectors.basePackage("com.study.module.mybatis.controller")) 38 .paths(PathSelectors.any()) 39 .build(); 40 } 41 42 /** 43 * 构建 api文档的详细信息函数,注意这里的注解引用的是哪个 44 * 45 * @return Swagger2 配置的RESTful Api 信息 46 */ 47 private ApiInfo apiInfo() { 48 return new ApiInfoBuilder() 49 // 接口文档标题 50 .title("SpringBoot-Swagger2-Mybatis-Demo") 51 // 接口文档描述 52 .description("API Description: 用于敏捷开发 >>> Spring Boot 测试使用 Swagger2 构建RESTful API") 53 // 服务条款网址 54 .termsOfServiceUrl("http://localhost/") 55 // 接口文档维护联系人（创建人） 56 .contact(new Contact("Drew", "http://www.baidu.com", "[email protected]")) 57 // 接口文档的版本号 58 .version("1.0.0") 59 .build(); 60 } 61 }
8. Spring Boot 启动类
package com.study.module.mybatis; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * @author Drew */ @SpringBootApplication @MapperScan(value = "com.study.module.mybatis.dao") public class MybatisApplication { public static void main(String[] args) { SpringApplication.run(MybatisApplication.class, args); } }
四、结果展示：
swagger2 文档结构展示
