用過Spring的朋友應(yīng)該多多少少都知道AOP（即面向切面）耀怜，本篇文章我們就來實戰(zhàn)如何使用AOP打印請求日志功能！

一茶宵、簡單web項目

1.創(chuàng)建項目

使用 IDEA 工具創(chuàng)建一個Spring Initializr項目危纫，選擇
Web>Spring Web Starter
SQL>Spring Data JPA
SQL>MySQL Driver
Developer Tools>Lombok
這幾個組件。

2.基本依賴

<dependencies>
    <!-- web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- mysql --->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <!-- Spring Data JPA -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <!-- 方便部分編碼 -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.8</version>
    </dependency>
    <!--test-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

3.創(chuàng)建數(shù)據(jù)庫

create database spring_boot_aop;

這里我們先不創(chuàng)建表，因為我們用了spring-data-jpa种蝶，后面我們用它來創(chuàng)建表契耿。

4.配置文件application.yml

server:
  port: 8080
spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/spring_boot_aop?characterEncoding=utf8&useSSL=true&serverTimezone=GMT%2B8
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
  jpa:
    hibernate:
      # update: 沒有表就新建，有表則更新
      ddl-auto: update
    # 控制臺顯示sql語句（正式環(huán)境還是不要用）
    show-sql: true

5.實體類

@Data
@Entity
@Table(name = "aop_user")
public class User {
    @Id
    @GeneratedValue
    private Long id;
    private String phone;
    private String password;
    private Date createTime;
    private Date updateTime;
}

6.啟動項目

完成以上幾個步驟之后蛤吓，我們啟動項目來創(chuàng)建對應(yīng)的 user 表宵喂。
啟動項目，如果控制臺能看到如下日志即表明項目沒有問題会傲，表創(chuàng)建成功锅棕！

Hibernate: create table aop_user (id bigint not null, create_time datetime, password varchar(255), phone varchar(255), update_time datetime, primary key (id)) engine=MyISAM
Hibernate: create table hibernate_sequence (next_val bigint) engine=MyISAM
Hibernate: insert into hibernate_sequence values ( 1 )

7.repository

public interface UserRepository extends JpaRepository<User, Long> {
    User findByPhone(String phone);
}

8.service & Impl

UserService

public interface UserService {
    /**
     * 注冊
     *
     * @param phone
     * @param password
     * @return
     */
    Result register(String phone, String password);

    /**
     * 登錄
     *
     * @param phone
     * @param password
     * @return
     */
    Result login(String phone, String password);
}

UserServiceImpl

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;

    /**
     * 注冊
     *
     * @param phone
     * @param password
     * @return
     */
    @Override
    public Result register(String phone, String password) {
        User byPhone = userRepository.findByPhone(phone);
        if (byPhone != null) {
            return ResultUtil.error(ResultEnum.REGISTER_ERROR);
        }
        User user = new User();
        user.setPhone(phone);
        user.setPassword(getMd5(phone, password));
        userRepository.save(user);
        return ResultUtil.success();
    }

    /**
     * 登錄
     *
     * @param phone
     * @param password
     * @return
     */
    @Override
    public Result login(String phone, String password) {
        User user = userRepository.findByPhone(phone);
        if (user == null) {
            return ResultUtil.error(ResultEnum.ACCOUNT_ERROR);
        }
        String md5 = getMd5(phone, password);
        if (!md5.equals(user.getPassword())) {
            return ResultUtil.error(ResultEnum.PASSWORD_ERROR);
        }
        UserVO userVO = new UserVO();
        userVO.setUserId(user.getId());
        userVO.setPhone(user.getPhone());
        return ResultUtil.success(userVO);
    }

    // md5加密
    public String getMd5(String phone, String password) {
        String salt = "^#)$^&$$!~@+(,.';-`";
        byte[] bytes = new StringBuilder(phone).append(password).append(salt).toString().getBytes();
        String md5DigestAsHex = DigestUtils.md5DigestAsHex(bytes);
        return md5DigestAsHex;
    }
}

9.controller

@RestController
public class UserController {

    @Autowired
    private UserService userService;

    /**
     * 注冊
     *
     * @param phone
     * @param password
     * @return
     */
    @PostMapping("/register")
    public Result register(String phone, String password) {
        return userService.register(phone, password);
    }

    /**
     * 登錄
     *
     * @param phone
     * @param password
     * @return
     */
    @PostMapping("/login")
    public Result login(String phone, String password) {
        return userService.login(phone, password);
    }
}

10.重啟項目，檢測接口是否可用

使用 Postman 或相似工具淌山，請求接口測試裸燎！
下面是我本地調(diào)試結(jié)果的截圖（圖比較多，請耐心查看）

• 注冊【成功】

  
  
  aop-register.png

• 注冊【失敗】

  
  
  aop-register-repeat.png

• 登錄【賬號錯誤】

  
  
  aop-login-phoneerror.png

• 登錄【密碼錯誤】

  
  
  aop-login-pwderror.png

• 登錄【成功】

  
  
  aop-login-success.png

好泼疑，接口基本上都是沒有問題的德绿！下面就進入我們今天的主題[廢話真多，我還以為要結(jié)束了呢~]：使用AOP打印請求日志退渗！

二移稳、加入AOP

1.切面類

@Component
@Aspect
@Slf4j
public class LogAspect {

    @Pointcut("execution(public * com.bpm.aop.web.*.*(..))")
    public void log(){
    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint){
        ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        // url
        log.info("url={}", request.getRequestURL());
        // method(Get/Post...)
        log.info("method={}", request.getMethod());
        // ip
        log.info("ip={}", request.getRemoteAddr());
        // 類方法
        log.info("class_method={}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        // 參數(shù)
        log.info("args={}", Arrays.asList(joinPoint.getArgs()));
    }

    @AfterReturning(returning = "resp", pointcut = "log()")
    public void doAfter(Object resp) {
        log.info("response={}", resp);
    }
}

2.重啟項目，請求接口会油，查看日志

2019-08-27 10:22:14.350  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : url=http://localhost:8081/login
2019-08-27 10:22:14.350  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : method=POST
2019-08-27 10:22:14.350  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : ip=0:0:0:0:0:0:0:1
2019-08-27 10:22:14.350  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : class_method=com.bpm.aop.web.UserController.login
2019-08-27 10:22:14.350  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : args=[17694870628, 123456]
Hibernate: select user0_.id as id1_0_, user0_.create_time as create_t2_0_, user0_.password as password3_0_, user0_.phone as phone4_0_, user0_.update_time as update_t5_0_ from aop_user user0_ where user0_.phone=?
2019-08-27 10:22:14.353  INFO 20636 --- [nio-8081-exec-3] com.bpm.aop.aspect.LogAspect             : response=Result(code=0, message=成功, data=User(id=1, phone=17694870628, password=8913dbaa6619b17369f3b85464a883d8, createTime=2019-08-27 10:06:53.0, updateTime=null))

通過上述步驟个粱，我們已經(jīng)實現(xiàn)了基本功能，好了翻翩，今天就到此位置了都许！

結(jié)束語：
完整代碼已提交至 Github，可結(jié)合本文使用嫂冻！