个人博客平台随笔

1.前端使用到的工具

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/semantic-ui@2.5.0/dist/semantic.min.css">

<script src="https://cdn.jsdelivr.net/npm/semantic-ui@2.5.0/dist/semantic.min.js"></script>

semantic ui依赖 jQuery：jsDelivr - A free, fast, and reliable CDN for JS and open source

https://cdn.jsdelivr.net/npm/jquery@3.6/dist/jquery.min.js

markdown编译器采用: Editor.md - 开源在线 Markdown 编辑器

随机图片：Lorem Picsum

---博客详情页面优化部分---

排版：typo.css

添加动画效果：animate.css

代码高亮显示：Prism官网下载prism.css和prism.js

生成目录：Tocbot官网下载tocbot.css和tocbot.min.js

生成二维码：qrcode.min.js

2.前端遇到的问题

在引用别人的typo.css时候和自己的css发生冲突，导致页面显示效果不佳

解决：将别人的typo.css封闭起来，在css中全部加上一个.typo前缀，只有包含typo元素下面的才会起作用。

3.idea构建框架

在idea中新建项目，选择Spring Initializer，选择java语言，maven类型，选择jdk系欸java版本后，添加相关依赖

在项目的src/main/resources中将application改成.yml文件，复制几个分别为开发环境application-dev.yml和生产环境application-pro.yml

在application.yml指定当前活跃的配置

application-pro.yml中

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/blog?serverTimezone=UTC
    username: root
    password: 123456
  jpa:
    hibernate:
      ddl-auto: none
    show-sql: true

logging:
  level:
    root: warn
    com.example: info
  file:
    path: log/blog-pro.log

server:
  port: 8081

application-dev.yml中

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/blog?serverTimezone=UTC
    username: root
    password: 123456
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

logging:
  level:
    root: info
    com.example: debug
  file:
    path: log/blog-dev.log

测试：

启动后访问8080，可以正常访问到404即成功

然后在application.yml中active: dev改成active: pro，重新启动访问8081出现404即配置成功

测试完后将application.yml的active改回dev

4.异常拦截处理

ControllerExceptionHandler.java

package com.example.handler;

import jakarta.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.servlet.ModelAndView;

@ControllerAdvice
public class ControllerExceptionHandler {

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    //统一拦截所有exception
    @ExceptionHandler(Exception.class)
    public ModelAndView exceptionHandler(HttpServletRequest request, Exception e) throws Exception {
        logger.error("Request URL : {}, Exception : {}", request.getRequestURL(),e);

        //状态码的异常不作统一处理
        if (AnnotationUtils.findAnnotation(e.getClass(), ResponseStatus.class) != null) {
            throw e;
        }

        ModelAndView mv = new ModelAndView();
        mv.addObject("url", request.getRequestURL());
        mv.addObject("exception", e);
        mv.setViewName("error/error");      //设置返回的页面
        return mv;
    }

}

IndexController.java

package com.example.web;

import com.example.NotFoundException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class IndexController {

    @GetMapping("/")
    public String index(){
//        int i = 9/0; //测试500
        String blog = null;
        if (blog == null) {
            throw new NotFoundException("博客不存在");
        }
        return "index";
    }
}

NotFoundException.java

package com.example;


import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ResponseStatus;

@ResponseStatus(HttpStatus.NOT_FOUND)
public class NotFoundException extends RuntimeException {

    public NotFoundException() {
    }

    public NotFoundException(String message) {
        super(message);
    }

    public NotFoundException(String message, Throwable cause) {
        super(message, cause);
    }
}

5.日志处理

aspect/LogAsppect.java

package com.example.aspect;


import jakarta.servlet.http.HttpServletRequest;
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 java.util.Arrays;

@Aspect
@Component
public class LogAspect {


    private final Logger logger = LoggerFactory.getLogger(this.getClass());

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

    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        String url = String.valueOf(request.getRequestURL());
        String ip = request.getRemoteAddr();
        String classMethod = joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName();
        Object[] args = joinPoint.getArgs();
        RequestLog requestLog = new RequestLog(url, ip, classMethod, args);
        logger.info("Request : {}", requestLog);
    }

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

    @AfterReturning(returning = "result", pointcut = "log()")
    public void doAfterReture(Object result) {
        logger.info("Result : {}" , result);
    }

    private class RequestLog {
        private String url;
        private String ip;
        private String classMethod;
        private Object[] args;

        public RequestLog(String url, String ip, String classMethod, Object[] args) {
            this.url = url;
            this.ip = ip;
            this.classMethod = classMethod;
            this.args = args;
        }

        @Override
        public String toString() {
            return "RequestLog{" +
                    "url='" + url + '\'' +
                    ", ip='" + ip + '\'' +
                    ", classMethod='" + classMethod + '\'' +
                    ", args=" + Arrays.toString(args) +
                    '}';
        }
    }
}