springboot functions

Posted 2020-09-06 yangfei969

1. spring boot 项目启动，如果不配置项目访问路径，默认为 /

2. 表单验证

spring项目：

<properties>           <springframework.version>4.0.6.RELEASE</springframework.version>    <hibernate.validator.version>5.1.2.Final</hibernate.validator.version>
<javax.validation.version>1.1.0.Final</javax.validation.version>
</properties>       

<dependency>
			<groupId>javax.validation</groupId>
			<artifactId>validation-api</artifactId>
			<version>${javax.validation.version}</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-validator</artifactId>
			<version>${hibernate.validator.version}</version>
		</dependency>

springboot项目：

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
 @NotBlank(message = "这个字段必传")
    private String size;
   @Min(value = 18, message = "禁止入门")
    private Integer age;
 @NotNull(message = "金额必传")
    private Double money;

@PostMapping(value = "/girls")
    public Result<Girl> girlAdd(@Valid Girl girl, BindingResult bindingResult) {
        if (bindingResult.hasErrors()) {
            return ResultUtil.error(1, bindingResult.getFieldError().getDefaultMessage());
        }

        girl.setCupSize(girl.getCupSize());
        girl.setAge(girl.getAge());

        return ResultUtil.success(girlRepository.save(girl));
    }
通过@Valid，BindingResult 验证的时候仅限参数为对象

//更新
    @PutMapping(value = "/girls/{id}")
    public Girl girlUpdate(@PathVariable("id") Integer id,
                           @RequestParam("cupSize") String cupSize,
                           @RequestParam("age") Integer age) {
        Girl girl = new Girl();
        girl.setId(id);
        girl.setCupSize(cupSize);
        girl.setAge(age);

        return girlRepository.save(girl);
    }
由于金额上增加了不能为空，这里同样不能通过。
{
  "code": -1,
  "msg": "未知错误",
  "data": null
}
返回这个错误是应为在@Controller注解实用类上增加了异常处理

3. AOP 获取常用数据

@Aspect
@Component
public class HttpAspect {

    private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);


    @Pointcut("execution(public * com.imooc.controller.GirlController.*(..))")
    public void log() {
    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        //url
        logger.info("url={}", request.getRequestURL());

        //method
        logger.info("method={}", request.getMethod());

        //ip
        logger.info("ip={}", request.getRemoteAddr());

        //类方法
        logger.info("class_method={}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());

        //参数
        logger.info("args={}", joinPoint.getArgs());
    }

    @After("log()")
    public void doAfter() {
        logger.info("222222222222");
    }

    @AfterReturning(returning = "object", pointcut = "log()")
    public void doAfterReturning(Object object) {
        logger.info("response={}", object.toString());
    }

4. 异常处理

import com.imooc.domain.Result;
import com.imooc.exception.GirlException;
import com.imooc.utils.ResultUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Indicates the annotated class assists a "Controller".
 * 2017-01-21 13:59
 */
@ControllerAdvice
public class ExceptionHandle {

    private final static Logger logger = LoggerFactory.getLogger(ExceptionHandle.class);

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Result handle(Exception e) {
        if (e instanceof GirlException) {
            GirlException girlException = (GirlException) e;
            return ResultUtil.error(girlException.getCode(), girlException.getMessage());
        }else {
            logger.error("【系统异常】{}", e);
            return ResultUtil.error(-1, "未知错误");
        }
    }
}

service 中将异常抛到controller，上诉代码在controller中进行处理

public void getAge(Integer id) throws Exception{
        Girl girl = girlRepository.findOne(id);
        Integer age = girl.getAge();
        if (age < 10) {
            //返回"你还在上小学吧" code=100
            throw new GirlException(ResultEnum.PRIMARY_SCHOOL);
        }else if (age > 10 && age < 16) {
            //返回"你可能在上初中" code=101
            throw new GirlException(ResultEnum.MIDDLE_SCHOOL);
        }

        //如果>16岁,加钱
        //...
    }

 http最外层对象

/**
 * http请求返回的最外层对象
 * 2017-01-21 13:34
 */
public class Result<T> {

    /** 错误码. */
    private Integer code;

    /** 提示信息. */
    private String msg;

    /** 具体的内容. */
    private T data;

5.springboot test

@RunWith(SpringRunner.class)
@SpringBootTest
public class GirlServiceTest {

    @Autowired
    private GirlService girlService;

    @Test
    public void findOneTest() {
        Girl girl = girlService.findOne(73);
        Assert.assertEquals(new Integer(13), girl.getAge());
    }
}