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RSS订阅转载 mysql--sql优化--替换not in
转https://blog.youkuaiyun.com/pcwblover008/article/details/80015855?utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromMachineLearnPai2%7Edefault-1.control&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7
2021-07-29 00:27:45
436
转载 分布式事务的数据一致性
转https://blog.youkuaiyun.com/qq_18298439/article/details/100293016?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522162720514616780255267333%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=162720514616780255267333&.
2021-07-25 23:22:32
211
转载 使用Java代码从网页中爬取数据到数据库中 -- 转
https://blog.youkuaiyun.com/qq_44891295/article/details/106293107
2021-04-21 14:54:18
416
原创 springboot,inputStream,找不到路径
import org.springframework.core.io.ClassPathResource;ClassPathResource cpr = new ClassPathResource(imgFile);inputStream = cpr.getInputStream();
2021-04-07 19:40:21
1108
原创 spring重难点-总结复习
转https://blog.youkuaiyun.com/ThinkWon/article/details/104397516优缺点：优点：1、简化开发，方便解耦：将所有对象的创建和依赖关系的维护交给spring来管理（把应用和依赖从应用代码中分离）2、aop编程spring提交切面编程，可以动态给目标对象增加功能3、声明式事务支出4、方便程序的测试 junit45、方便集成各种框架 mybatis，springmvc6、降低javaee的使用难度对JDBC，j...
2021-04-03 23:45:38
1059
1
原创 lombok使用笔记
Lombok作用：帮使用者提高编码效率，减少重复与冗余的代码原理：ASM 动态修改class文件 <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.8</version> </dependency.
2021-04-03 14:22:32
175
原创 Java中使用freemarker导出word文档,图片,表格,不确定数量图片
转 -- 能用https://blog.youkuaiyun.com/weixin_42142057/article/details/82495417
2021-04-02 19:35:43
623
原创 springboot整合mybats-plus和lombok实现一对多和延迟加载
configuration: map-underscore-to-camel-case: false cache-enabled: true #配置的缓存的全局开关 lazyLoadingEnabled: true #延时加载的开关 multipleResultSetsEnabled: true #开启的话，延时加载一个属性时会加载该对象全部属性，否则按需加载属性 log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #打印sql..
2021-03-27 22:28:39
309
原创 常见异常、bug和重难点 持续更新
保存全局异常信息 ex=org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.sf.gis.emergencytransport.dao.TransOrderMapper.getCompanyOrderListInvalid bound statement (not found): com.sf.gis.emergencytransport.dao.TransOrderMapper.get.
2021-03-23 11:48:02
216
转载 springboot整合security
转https://blog.youkuaiyun.com/qq_29580525/article/details/79317969?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161622572116780261989975%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=161622572116780261989975&biz_id=.
2021-03-20 15:45:00
251
原创 spring,springmvc,springboot注解 in work
@RestController@RequestMapping("/ChargingSupply")public class ChargingSupplyController {@RequestMapping(value = "/getHouseholdChargingRisk", method = { RequestMethod.POST, RequestMethod.GET })public RestResponse getHouseholdChargingRisk(@RequestP..
2021-03-20 06:39:23
134
原创 quartz in work
@Configurationpublic class QuartzConfig { @Bean MethodInvokingJobDetailFactoryBean methodInvokingJobDetailFactoryBean1() { MethodInvokingJobDetailFactoryBean areaChargingBean = new MethodInvokingJobDetailFactoryBean(); areaChargi..
2021-03-20 06:39:12
112
原创 json操作 in work
net.sf.jsonJSONObject jsonObject = (JSONObject)httpTransService.sendReq("queryGuidByBuildingCode",map,method).get("data");JSONArray jsonArray = (JSONArray)jsonObject.get("data"); for(int i=0;i<jsonArray.size();i++) { ..
2021-03-20 06:17:35
106
原创 Enum in work
public enum RiskLevelEnum { HIGH_RISK(1,"高风险"), MEDIUM_RISK(2,"中风险"), LOW_RISK(3,"低风险"), ULTRA_LOW_RISK(4,"超低风险"); private Integer value; private String name; RiskLevelEnum(Integer value, String name) { this.value =..
2021-03-20 06:17:14
103
原创 mybaits使用 in work
<resultMap id="BaseResultMap" type="com.sf.gis.emergencytransport.entity.OrderCompany"> <id column="id" property="id" /> <result column="project_id" property="projectId" /> <result column="company_id" property="companyId"..
2021-03-20 06:06:08
163
2
原创 mybatis-plus in work
delete(new EntityWrapper<>() );insert(areaCharging);EntityWrapper<ChargingPile> entityWrapper = getEntiryWrapperByLevel(guid,level);entityWrapper.setSqlSelect(" sum(Replace(remark,'辆','')) as chargingPortNumber ,count(id) as cha..
2021-03-20 05:59:58
249
转载 maven assembly插件辅助分环境打包
转https://blog.youkuaiyun.com/qq_15903671/article/details/88868887
2021-03-18 22:07:43
154
原创 GitHub开源：一键生成前后端代码神器 jeecg
JeecgBoot是一款基于BPM的低代码平台！前后端分离架构 SpringBoot 2.x，SpringCloud，Ant Design&Vue，Mybatis-plus，Shiro，JWT，支持微服务。强大的代码生成器让前后端代码一键生成，实现低代码开发！ JeecgBoot引领新低代码开发模式 OnlineCoding-> 代码生成器-> 手工MERGE， 帮助Java项目解决70%的重复工作，让开发更多关注业务，既能快速提高效率，节省研发成本，同时又不失灵活性！一系列低代码能力：
2021-03-18 11:48:14
463
原创 使用Tomcat 启动war包时报Not running on Jetty, JSR-356 support unavailable 错误 + vue项目发布在tomcat
打成WAR包在TOMCAT启动,报上述错将JETTY相关依赖注释掉<!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jetty</artifactId> <scope>${jetty.scope}..
2021-03-16 18:02:34
1048
原创 静态工具方法如何调用非静态变量
现有变量Double a(从配置文件中读取)如何在静态工具方法func1调用变量a呢???理论上静态方法不能调用非静态变量如果非要这样的话,我采用的方法是 :在其他文件中读取配置文件中内容,然后作为参数传给func1eg:声明func(Double a)调用DistanceUtils.func(a)其他https://blog.youkuaiyun.com/qq_38243970/article/details/80884280?ops_request_misc=&am...
2021-03-16 16:42:02
217
转载 linux,tomcat杀不死进程
https://blog.youkuaiyun.com/wang1988081309/article/details/106332383?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_utm_term-0&spm=1001.2101.3001.4242
2021-03-15 16:55:45
232
原创 事务超时
情景:一个定时任务,每天凌晨同步某一张a表数据,其需要查询b表和调用其他平台接口,其同步的数据有将近3w条,此时写在一个事务中就出现了问题且 MYSQL的事务超时时间没法改(其他项目也用,且因为一个功能就改数据库配置感觉不合理)https://blog.youkuaiyun.com/moshenglv/article/details/82179417?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161579281716780265470..
2021-03-15 16:51:28
645
转载 linux上测试get,post接口
有时候本地测试通过,测试环境调用外部接口情况不清楚(有没有相关日志),可以在LINUX上显示调用GET接口转http://www.voidcn.com/article/p-rymlbnte-bqr.htmleg: curl "http://www.baidu.com"
2021-03-15 10:15:30
792
原创 springboot大杂烩
本人代码不敢乱贴.....为什么需要继承SpringBootServletInitializerhttps://blog.youkuaiyun.com/hy_coming/article/details/103307000?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161536915316780271553121%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.
2021-03-12 15:40:44
138
转载 Mysql批量插入事务插入性能优化
https://blog.youkuaiyun.com/zdw19861127/article/details/78597523?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161543365116780262512853%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=161543365116780262512853&biz_id=0&
2021-03-11 11:45:40
472
1
转载 springboot整合aop @EnableAspectJAutoProxy
转https://blog.youkuaiyun.com/zz210891470/article/details/54174169?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_utm_term-1&spm=1001.2101.3001.4242亲测有效
2021-03-10 15:46:36
813
转载 定时任务
转https://blog.youkuaiyun.com/u012702547/article/details/89376171?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161529149416780271512216%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=161529149416780271512216&am
2021-03-09 20:28:47
81
转载 mysql优化合集-转
1、https://artisan.blog.youkuaiyun.com/article/details/1075012992、
2021-03-09 15:23:19
84
转载 mysql优化--优化临时表-转
https://blog.youkuaiyun.com/yunhua_lee/article/details/12064477
2021-03-08 18:30:08
259
转载 explain超详细进阶-转
https://artisan.blog.youkuaiyun.com/article/details/107477100
2021-03-08 18:16:54
106
转载 git,tortoisegit,github,svn,tortoisesvn使用
TortoiseGit上传项目代码到github方法转https://www.cnblogs.com/hjvsdr/p/7152141.html提交步骤:本地修改addcommit到本地仓库:push到远程仓库:可提交的同时推送
2021-02-27 23:06:12
167
转载 mysql order by优化 --转
https://www.cnblogs.com/songwenjie/p/9418397.html总结：WHERE条件和ORDER BY使用相同的索引，并且ORDER BY的顺序和索引顺序（where使用的索引）相同，并且ORDER BY的字段都是升序或者降序，并且查询字段仅仅是排序的索引字段。否则肯定需要额外的排序操作，就会出现Filesort。...
2021-02-26 19:17:44
100
转载 mybatis-plus入门
转https://blog.youkuaiyun.com/codejas/article/details/81054791?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522161396536316780269895351%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=161396536316780269895351&biz_id=0&am.
2021-02-22 15:37:19
70
转载 springcloud入门
好东西转https://blog.youkuaiyun.com/hantangduhey/category_9015566.html
2021-02-20 21:14:12
129
hadoop集群搭建教程.zip
2019-12-23
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