idea搭建Spring boot

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bxw</groupId>
    <artifactId>springboot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

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

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

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

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!-- 如果没有该项配置，devtools不会起作用，即应用不会restart -->
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

application.yml

spring:
  profiles:
    active: dev
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/spring
    username: root
    password: root
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

application-dev.yml

server:
  port: 8888
  context-path: /springboot
user:
  username: bxw
  password: bxw123
  content: "username:${name} password:${psd}"
author: bxw

application-prod.yml

server:
  port: 8000
  context-path: /springboot
user:
  username: haha
  password: haha123
  content: "username:${name} password:${psd}"
author: haha

 

entity:

实体类Girl.java,这里包含了springboot中表单验证的举例,@Min验证最小值

package com.bxw.springboot.entity;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.Min;

@Entity
public class Girl {

    @Id
    @GeneratedValue
    private Integer id;

    private String name;

    @Min(value = 18,message = "未成年少女禁止")
    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getName() {

        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


}

controller

GIrlController.java

package com.bxw.springboot.controller;

import com.bxw.springboot.dao.GirlDao;
import com.bxw.springboot.entity.Girl;
import com.bxw.springboot.entity.Result;
import com.bxw.springboot.enums.ResultEnum;
import com.bxw.springboot.service.GirlService;
import com.bxw.springboot.utils.ResultUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.util.List;

@RestController()
@RequestMapping("/girl")
public class GirlController {
    @Autowired
    private GirlDao girlDao;

    @Autowired
    private GirlService girlService;

    /**
     * 找到所有的女生
     * @return
     */
    @GetMapping("/list")
    public List<Girl> FindGirlList(){
        return girlDao.findAll();
    }

    /**
     * 通过年龄查询
     * @param age
     * @return
     */
    @GetMapping("/byAge/{age}")
    public List<Girl> findByAge(@PathVariable("age") Integer age){
        return girlDao.findByAge(age);
    }

    /**
     * 更新
     * @param id
     * @param name
     * @param age
     * @return
     */
    @GetMapping("/update")
    public Girl updateGirl(@RequestParam("id") Integer id,
                           @RequestParam("name") String name,
                           @RequestParam("age") Integer age){
        Girl girl = new Girl();
        girl.setId(id);
        girl.setName(name);
        girl.setAge(age);

        return girlDao.save(girl);
    }

    /**
     * 增加一个妹子
      * @return
     */
    @GetMapping("/add")
    //public Girl addGirl(@RequestParam("name") String name,
    //                    @RequestParam("age") Integer age){
    public Result addGirl(@Valid Girl girl, BindingResult bindingResult){
        if(bindingResult.hasErrors()){//如果验证的结果错误，打印信息
          //  return ResultUtil.failed(null);
            return  null;
        }
      //  Girl girl = new Girl();
     //   girl.setName(name);
       // girl.setAge(age);

        return ResultUtil.success(ResultEnum.SUCCESS.getCode(),ResultEnum.SUCCESS.getMsg(),girlDao.save(girl));
    }

    @GetMapping("/del/{id}")
    public void delGirl(@PathVariable("id") Integer id){
        girlDao.delete(id);
    }

    @GetMapping("/find/{id}")
    public Girl findGirl(@PathVariable("id") Integer id){
        return girlService.findByAge(id);
    }

}

=================================================统一日志处理=========================================================

Aop

HttpAspect.java

package com.bxw.springboot.aspect;

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;

@Aspect
@Component
public class HttpAspect {
    private final static Logger log = LoggerFactory.getLogger(HttpAspect.class);

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

    @Before("log()")
    public void doBefore(JoinPoint jp){
        log.info("this is doBefore method");

        ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        //url
        log.info("url={}",request.getRequestURL());
        //method
        log.info("method={}",request.getMethod());
        //ip
        log.info("ip={}",request.getRemoteAddr());
        //类方法
        log.info("class_method={}",jp.getSignature().getDeclaringTypeName()+"."+jp.getSignature().getName());
        //参数
        log.info("args={}",jp.getArgs());
    }

    @After("log()")
    public  void doAfter(){
        log.info("this is doAfter method");
    }
/*
    @Around("log()")
    public void doAround(ProceedingJoinPoint pjp){
        log.info("start doAround method");
        try {
            pjp.proceed();
        }catch (Throwable e){
            e.printStackTrace();
        }
        log.info("end doAround method");
    }
*/
    @AfterReturning(returning = "obj",pointcut = "log()")
    public void doAfterReturning(Object obj){
        log.info("obj={}",obj.toString());
    }




}

 =====================================================统一异常处理：=========================================================

先定义一个封装异常的实体类Result.java

package com.bxw.springboot.entity;

public class Result<T> {

    /** 状态码.{0：失败,1:成功} */
    private Integer code;

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

    /** 具体的内容. */
    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;
    }
}

枚举定义异常类型ResultEnum.java

package com.bxw.springboot.enums;

public enum ResultEnum {
    UKNOWN_ERROR(-1,"未知错误"),
    SUCCESS(1,"成功"),
    failed(0,"失败"),
    ;

    private  Integer code;

    private String msg;

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

    public Integer getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}

定义工具类:ResultUtil.java

package com.bxw.springboot.utils;

import com.bxw.springboot.entity.Result;

public class ResultUtil {

    /**
     * 请求成功
     * @param obj
     * @return
     */
    public static Result success(Integer code,String msg,Object obj){
        Result result = new Result();
        result.setCode(code);
        result.setMsg(msg);
        result.setData(obj);
        return result;
    }

    /**
     * 请求失败
     * @param obj
     * @return
     */
    public static Result failed(Integer code,String msg,Object obj){
        Result result = new Result();
        result.setCode(code);
        result.setMsg(msg);
        result.setData(obj);
        return result;
    }
}

自定义异常GirlException.java

package com.bxw.springboot.Exception;

public class GirlException extends RuntimeException{

    /** 状态码. */
    private Integer code;

    public GirlException(Integer code,String msg){
        super(msg);
        this.code = code;
    }

    public Integer getCode() {
        return code;
    }

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

异常处理类ExceptionHandle.java该类必须放在spring可以扫描到的位置。

package com.bxw.springboot.Handle;

import com.bxw.springboot.Exception.GirlException;
import com.bxw.springboot.entity.Result;
import com.bxw.springboot.enums.ResultEnum;
import com.bxw.springboot.utils.ResultUtil;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

@ControllerAdvice
public class ExceptionHandle {

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Result handle(Exception e){
        if(e instanceof GirlException){
            GirlException girlException = (GirlException)e;
            return ResultUtil.failed(girlException.getCode(),girlException.getMessage(),null);
        }else{
            return ResultUtil.failed(ResultEnum.UKNOWN_ERROR.getCode(),ResultEnum.UKNOWN_ERROR.getMsg(),null);
        }
    }
}

@ExceptionHandler统一处理某一类异常