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>Java大忌!后端开发人一定要知道的禁忌!
Java大忌!后端开发人一定要知道的禁忌!
2025-12-04 17:57:23
Java大忌!后端开发人一定要知道的禁忌!
给想学Java后端的小伙伴们提个醒!💻🔥
作为从小白成长为项目核心的过来人,今天分享一些我在编码路上踩过的坑和硬核技巧,帮你避开雷区,快速进阶!
1⃣ 别做无效编码!
很多新手一上来就狂堆复杂框架,忽视基础。后端核心是解决业务问题,技术栈的复杂度不等于专业度
反面案例:简单业务强上微服务,导致项目臃肿难维护
正确姿势:遵循KISS原则,先用Spring Boot单体应用快速验证,业务复杂后再拆分
2⃣ 编码前准备很重要!
✅ 环境配置:规范JDK、Maven/Gradle、IDE统一设置,避免环境差异导致问题
✅ 技术选型:根据业务场景选择组件(如MySQL事务需求选InnoDB,高并发读选Redis)
✅ 接口契约:先用Swagger定义API规范,再开发,减少前后端联调矛盾
3⃣ 这些细节最致命!
❌ 魔法值泛滥:代码中直接写if (status == 1),应改用枚举或常量
❌ 日志缺失:关键流程无日志记录,故障排查靠猜。需用SLF4J+Logback规范输出
❌ SQL注入:拼接SQL字符串导致安全漏洞,必须用预编译PreparedStatement
4⃣必备工具清单
✔ IDE神器:IntelliJ IDEA(调试+代码模板)+ Postman(接口测试)
✔ 版本控制:Git(分支管理规范,如Git Flow)
✔ 性能分析:Arthas(线上诊断)+ JProfiler(内存泄漏检测)
5⃣进阶技巧
✅ 缓存设计:Redis缓存热点数据,但需解决缓存穿透(布隆过滤器)、雪崩(随机过期时间)
✅ 异步解耦:MQ(如RabbitMQ)处理耗时任务,如邮件发送、订单结算
✅ 数据库优化:索引遵循最左前缀原则,避免SELECT *,联表查询控制在3张表以内
6⃣小众但超好用的技巧
🔥 防御式编程:先校验参数合法性,再执行业务逻辑,减少异常分支
🔥 枚举替代常量:将状态码、类型值定义为枚举,提升可读性和可维护性
🔥 线程池参数调优:根据业务类型(CPU密集型/IO密集型)定制核心线程数和队列策略
后端开发是藏在代码行间的艺术,这些技巧能点亮你的系统设计之路!
🚀 记住:最好的代码是让维护者忘记它的存在~
#java
#编程
#计算机专业
#程序员
#程序员的出路
#java后端
#java开发
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请求信息 : 2025-12-20 10:50:15 HTTP/2.0 GET : https://f.mffb.com.cn/a/456630.html
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缓存信息 : 0 reads,0 writes
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CONNECT:[ UseTime:0.000919s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001271s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002202s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000464s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.001003s ]
SELECT * FROM `set` [ RunTime:0.004262s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.001140s ]
SELECT * FROM `article` WHERE `id` = 456630 LIMIT 1 [ RunTime:0.008791s ]
UPDATE `article` SET `lasttime` = 1766199016 WHERE `id` = 456630 [ RunTime:0.010994s ]
SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000536s ]
SELECT * FROM `article` WHERE `id` < 456630 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004126s ]
SELECT * FROM `article` WHERE `id` > 456630 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006823s ]
SELECT * FROM `article` WHERE `id` < 456630 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006424s ]
SELECT * FROM `article` WHERE `id` < 456630 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.022284s ]
SELECT * FROM `article` WHERE `id` < 456630 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013884s ]
0.211666s