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Java项目实战
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瑞吉外卖开发笔记 一
笔记内容为黑马程序员视频内容 1、软件开发整体介绍 软件开发流程
创建数据库
执行SQL脚本
数据表
解决IDEA加载maven工程缓慢 VM Options:-DarchetypeCatalog=local 添加依赖: org.springframework.boot spring-boot-starter-parent 2.4.5 com.ka reggie 1.0-SNAPSHOT 1.8 org.springframework.boot spring-boot-starter org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-starter-web compile com.baomidou mybatis-plus-boot-starter 3.4.2 org.projectlombok lombok 1.18.20 com.alibaba fastjson 1.2.76 commons-lang commons-lang 2.6 mysql mysql-connector-java runtime com.alibaba druid-spring-boot-starter 1.1.23 org.springframework.boot spring-boot-maven-plugin 2.4.5application.yml server: port: 8080 spring: application: #应用名称 name: reggie_take_out datasource: druid: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/reggie?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true username: root password: 1234 mybatis-plus: configuration: #address_book->AddressBook #在映射实体或者属性时，将数据库中表名和字段名中的下划线去掉，按照驼峰命名法映射 map-underscore-to-camel-case: true log-impl: org.apache.ibatis.logging.stdout.StdOutImpl global-config: db-config: id-type: ASSIGN_ID配置application启动类 @Slf4j @SpringBootApplication public class ReggieApplication { public static void main(String[] args) { SpringApplication.run(ReggieApplication.class,args); log.info("项目启动成功！！！"); } }把前端的静态资源放在resource目录
设置静态资源映射 @Slf4j @Configuration public class WebMvcConfig extends WebMvcConfigurationSupport { @Override protected void addResourceHandlers(ResourceHandlerRegistry registry) { log.info("开始静态资源映射"); registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/"); registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/"); } }启动项目，访问http://localhost:8080/backend/index.html
登录页面展示(http://localhost:8080/backend/page/login/login.html)
查看登录请求信息
数据模型（employee表）
EmployeeMapper @Mapper public interface EmployeeMapper extends BaseMapper { }EmployeeService public interface EmployeeService extends IService { }EmployeeServiceImpl @Service public class EmployeeServiceImpl extends ServiceImpl implements EmployeeService { }EmployeeController @Slf4j @RestController @RequestMapping("/employee") public class EmployeeController { @Autowired private EmployeeServiceImpl employeeService; } 导入返回结果类R 此类是一个通用结果类，服务端响应的所有结果最终都会包装成此种类型返回给前端页面 @Data public class R { private Integer code; //编码：1成功，0和其它数字为失败 private String msg; //错误信息 private T data; //数据 private Map map = new HashMap(); //动态数据 public static R success(T object) { R r = new R(); r.data = object; r.code = 1; return r; } public static R error(String msg) { R r = new R(); r.msg = msg; r.code = 0; return r; } public R add(String key, Object value) { this.map.put(key, value); return this; } } 在Controller中创建登录方法
@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
@Autowired
private EmployeeServiceImpl employeeService;
@PostMapping("/login")
public R logib(HttpServletRequest request, @RequestBody Employee employee) {
//1、将页面提交的密码进行md5加密处理
String password = employee.getPassword();
password = DigestUtils.md5DigestAsHex(password.getBytes());
//2、根据页面提交的用户名来查数据库
LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper();
queryWrapper.eq(Employee::getUsername, employee.getUsername());
Employee emp = employeeService.getOne(queryWrapper);
//3、如果没有查询到则返回失败结果
if (emp == null) {
return R.error("登录失败");
}
//4、比对密码，如果不一致则返回失败结果
if (!emp.getPassword().equals(password)) {
return R.error("密码错误");
}
//5、查看员工状态，如果已禁用状态，则返回员工已禁用结果
if (emp.getStatus() == 0) {
return R.error("账号已禁用");
}
//6、登录成功，将用户id存入Session并返回成功结果
request.getSession().setAttribute("employee", emp.getId());
return R.success(emp);
}
}
5、后台退出功能开发
需求分析
代码实现 在Controller中创建退出方法 //员工退出 @PostMapping("/logout") public R logout(HttpServletRequest request){ //清理Session中保存的当前员工登录的id request.getSession().removeAttribute("employee"); return R.success("退出成功"); } |
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