weixin_43891086的博客

Spring Boot读取配置的几种方式在application.yml或者properties文件中添加：info.address= USAinfo.company= Springinfo.degree= high@Value注解读取方式mport org.springframework.beans.factory.annotation.Value;import org.springframework.stereotype.Component; @Componentpublic cl

1.对查询进行优化，应尽量避免全表扫描，首先应考虑在 where 及 order by 涉及的列上建立索引。2.应尽量避免在 where 子句中对字段进行 null 值判断，否则将导致引擎放弃使用索引而进行全表扫描，如：select id from t where num is null可以在num上设置默认值0，确保表中num列没有null值，然后这样查询：select id from ...

- [第一步 ] js 脚本//获取请求参数值function getQueryString(name) {var reg = new RegExp(’(^|&)’ + name + ‘=([^&]*)(&|$)’, ‘i’);var r = window.location.search.substr(1).match(reg);//核心if (r != ...

1、导入jar包，添加pom依赖redis.clientsjedis2.9.02、测试连接publicstaticvoid main(String[] args) {Jedis jedis = new Jedis(“192.168.33.128”,6379);jedis.auth(“123456”);System.out.println(jedis.ping());jedis...

=====常用的select使用KaTeX parse error: Expected 'EOF', got '#' at position 3: ("#̲select_id").cha…("#select_id").find(“option:selected”).text(); //获取Select选择的Textvar checkValue=KaTeX parse error: Expe...