Spring BootJava学习笔记

springboot-数据校验、异常处理、单元测试、打包、日志

2017-07-07  本文已影响540人  inke

数据校验、异常处理、单元测试、打包、日志

[toc]

数据校验

在 model 增加注解 @Min(value = 18,message = "不能小于18岁")

@Entity
public class Person {

    @Id
    @GeneratedValue
    private Integer id;
    private String name;
    
    @Min(value = 18,message = "不能小于18岁")
    private Integer age;

    。。。set、get 方法
}

在 controller 的 model 增加@Valid注解,同时可以BindingResult获取校验的信息。

@PostMapping(value = "/addPerson")
public Person addPerson(@Valid Person person, BindingResult bindingResult) {
   if (bindingResult.hasErrors()) {
       //输出错误信息:不能小于18岁
       System.out.print(bindingResult.getFieldError().getDefaultMessage());
   }
   return personRespository.save(person);
}

异常处理

定义常量枚举:ResultEnum.java

public enum ResultEnum {

    UNKNOW(-1, "未知错误"),
    OKKK(100, "小于18岁"),
    NOOO(101, "大于50岁"),;

    private Integer code;
    private String msg;

    ResultEnum(Integer code, String mag) {
        this.code = code;
        this.msg = mag;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMag() {
        return msg;
    }

    public void setMag(String mag) {
        this.msg = mag;
    }
}

自定义异常类:PersonException.java

public class PersonException extends Exception {
    private Integer code;
    private String msg;

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public PersonException(ResultEnum resultEnum) {
        this.code = resultEnum.getCode();
        this.msg = resultEnum.getMag();
    }
}

定义返回结果类:ResultInfo.java

public class ResultInfo<T> implements Serializable {
    private int code;
    private String msg;
    private T data;

    public ResultInfo(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

全局异常处理类ResultExceptionHandle.java

@ControllerAdvice
public class ResultExceptionHandle {

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public ResultInfo handleException(HttpServletRequest request, Exception e) {
        if (e instanceof PersonException) {
            PersonException personException = (PersonException) e;
            return new ResultInfo(personException.getCode(), personException.getMsg());
        }
        return new ResultInfo(-1, "未知错误");
    }
}

Controller 正常调用,全局 Exception 会自动拦截处理 HelloController.java

@RestController
public class HelloController {
    @Autowired
    private PersonRespository personRespository;

    @PostMapping(value = "/addPerson")
    public Person addPerson(@Valid Person person, BindingResult bindingResult) throws Exception {
        if (bindingResult.hasErrors()) {
            //输出错误信息
            System.out.print(bindingResult.getFieldError().getDefaultMessage());
        }
        return personService.save(person);
    }
}

单元测试

需要模拟 http 请求进行单元测试,类上要添加注解(@RunWith(SpringRunner.class)@SpringBootTest@AutoConfigureMockMvc),方法上也要添加注解(@Test),使用MockMvc进行请求模拟。

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class PersonControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    public void findPerson() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/findPersons")).andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().string("hello"));
    }
}

打包默认会运行所有单元测试,可以通过参数跳过单元测试。


打包

如果需要打包发布应用的话,可以打包成 jar(docker用这种方式) 或者 war(老方式)
还需要在增加一个打包插件:spring-boot-maven-plugin

pom.xml

<build>
   <plugins>
       <plugin>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-maven-plugin</artifactId>
           <executions>
               <execution>
                   <goals>
                       <goal>repackage</goal>
                   </goals>
               </execution>
           </executions>
       </plugin>
   </plugins>
</build>

使用命令:

mvn package

默认在 target 目录下生成 jar 或者 war 文件,jar 可以直接使用 jdk 运行,war 需要放到 tomcatwebapp 目录下。

java -jar spring-boot-demo-1.0-SNAPSHOT.jar

日志

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

    @Pointcut("execution(public * com.example.HelloController.*(..))")
    public void log() {

    }

    @Before("log()")
    public void logBefore() {
        logger.info("logBefore");
    }


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