一、表單驗證

1、在實體類中設定我們過濾的條件

@Min(value = 18,message = "未成年禁止註冊！")
    private int userage;

2、在控制器中返回的我們過濾的結果

    /**
     * POST方式新增一個使用者
     * @param user
     * @return
     */
    @PostMapping(value = "adduser")
    public User addUser(@Valid User user, BindingResult bindingResult){

        //當表單中有不符合我們設定的時候
 

        if (bindingResult.hasErrors()){
            //打印出我們設定的警告
            System.out.println(bindingResult.getFieldError().getDefaultMessage());
            return null;
        }

        userRespository.save(user);
        return user;
    }

二、AOP處理請求

AOP:面向切面程式設計

1、新增依賴

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

2、寫一個攔截器

graph LR
Before-->控制器
控制器-->After

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import
 
 org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * 攔截器
 *
 * @author MiChong
 * @Email [email protected]
 * @create 2018/2/22 0022
 * @Version:V1.0
 */
@Aspect
@Component
public class HttpAspect {
    private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);

    /**
     * 下面的攔截器可以引用log()方法,為了以後配置修改起來麻煩，這裡統一規定了攔截包名
     */
    @Pointcut("execution(public * cn.buildworld.girl.web..*(..))")
    public void log(){

    }

    /**
     * 訪問控制器方法之前走的方法，註解後面是我們要攔截的控制器
     * @param joinPoint 為了獲取類方法和引數
     */
    @Before("log()")
    public void before(JoinPoint joinPoint){
        logger.info("before攔截");
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

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

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

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

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

        //引數攔截
        logger.info("args={}",joinPoint.getArgs());

    }

    /**
     * 訪問控制器方法之後走的方法，註解後面是我們要攔截的控制器
     */
    @After("log()")
    public void after(){
        logger.info("after攔截");
    }

    /**
     * 獲得返回的內容
     * @param object 返回的內容
     */
    @AfterReturning(returning = "object",pointcut = "log()")
    public void doAfterReturning(Object object){
        logger.info("response={}",object);
    }

}

三、統一異常處理

1、自定義一個異常類

PersonException.java

/**
 * 自定義異常類
 *
 * @author MiChong
 * @Email [email protected]
 * @create 2018/2/22 0022
 * @Version:V1.0
 */

public class PersonException extends RuntimeException {

    private Integer code;


    /**
     * @param message 錯誤資訊
     * @param code 錯誤碼
     */
    public PersonException(String message, Integer code) {
        super(message);
        this.code = code;
    }


    public Integer getCode() {
        return code;
    }

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

2、建立異常攔截器

ExceptionHandle.java

import cn.buildworld.girl.pojo.Result;
import cn.buildworld.girl.pojo.ResultUtil;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Create by MiChong on 2018/2/22 0022
 *
 * @Email [email protected]
 *
 * 捕獲異常
 */

@ControllerAdvice
public class ExceptionHandle {

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Result handle(Exception e){
        //判斷異常是否是我們自定義的異常
        if(e instanceof PersonException){
            PersonException personException = (PersonException) e;
            return ResultUtil.error(personException.getCode(),personException.getMessage());
        }

        return ResultUtil.error(-1,e.getMessage());
    }
}

3、結果集封裝

Result.java

package cn.buildworld.girl.pojo;

/**
 * json物件
 *
 * @author MiChong
 * @Email 1564666023@qq.com
 * @create 2018/2/22 0022
 * @Version:V1.0
 */

public class Result<T> {
    /**
     * 錯誤碼
     */
    private Integer code;

    /**
     * 提示資訊
     */
    private String msg;

    /**
     * 具體的內容
     */
    private T data;

    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 T getData() {
        return data;
    }

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

ResultUtil.java

package cn.buildworld.girl.pojo;

/**
 * 返回的結果包裝類
 *
 * @author MiChong
 * @Email [email protected]
 * @create 2018/2/22 0022
 * @Version:V1.0
 */

public class ResultUtil {

    /**
     * 獲取成功的情況
     * @param object
     * @return
     */
    public static Result success(Integer code,Object object){
        Result result = new Result();
        result.setCode(code);
        result.setMsg("成功");
        result.setData(object);

        return result;
    }

    /**
     * 獲取失敗的情況
     * @param object
     * @return
     */
    public static Result error(Integer code,Object object){
        Result result = new Result();
        result.setCode(code);
        result.setMsg("失敗");
        result.setData(object);

        return result;
    }
}

4、使用

在服務層測試

public void getAge(Long id) throws Exception{
        User one = userRespository.findOne(id);
        if(one.getUserage() < 10){
            throw  new PersonException("你還在上小學吧", 100);
        }
    }

四、單元測試

測試請求的url介面

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;

import javax.swing.*;

import static org.junit.Assert.*;

/**
 * Create by MiChong on 2018/2/22 0022
 *
 * @Email [email protected]
 */
@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class PersonControllerTest {

    @Autowired
    private MockMvc mockMvc;
    @Test
    public void getInfo() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/demo/getInfo"))
                .andExpect(MockMvcResultMatchers.status().isOk());
    }
}