<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Java_Rookie_Xiao的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; Java_Rookie_Xiao]]></copyright><item><title><![CDATA[OSS上传文件后下载报错 NoSuchKey: The specified key does not exist.]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126687017</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126687017</guid><author>Java_Rookie_Xiao</author><pubDate>Sun, 04 Sep 2022 11:36:07 +0800</pubDate><description><![CDATA[阿里云OSS上传文件后下载报错 NoSuchKey: The specified key does not exist.]]></description><category></category></item><item><title><![CDATA[Maven引入本地Jar包]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126334860</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126334860</guid><author>Java_Rookie_Xiao</author><pubDate>Sun, 14 Aug 2022 19:22:40 +0800</pubDate><description><![CDATA[java maven引用本地jar包]]></description><category></category></item><item><title><![CDATA[BeanUtil拷贝对象或集合时属性名不对应导致为空]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126274274</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126274274</guid><author>Java_Rookie_Xiao</author><pubDate>Wed, 10 Aug 2022 21:07:14 +0800</pubDate><description><![CDATA[BeanUtil拷贝对象或集合时属性名不对应导致字段为空]]></description><category></category></item><item><title><![CDATA[全局处理Long类型字段返回前端精度丢失]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126197078</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126197078</guid><author>Java_Rookie_Xiao</author><pubDate>Sat, 06 Aug 2022 17:14:27 +0800</pubDate><description><![CDATA[全局处理Long类型字段返回前端精度丢失]]></description><category></category></item><item><title><![CDATA[使用MongoTemplate时,如何去掉_class字段]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126105881</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126105881</guid><author>Java_Rookie_Xiao</author><pubDate>Mon, 01 Aug 2022 17:39:05 +0800</pubDate><description><![CDATA[使用MongoTemplate时,如何去掉_class字段]]></description><category></category></item><item><title><![CDATA[【加索引前后查询性能对比】]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126086638</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/126086638</guid><author>Java_Rookie_Xiao</author><pubDate>Sun, 31 Jul 2022 16:50:47 +0800</pubDate><description><![CDATA[实际上，索引也是一张表，该表保存了主键与索引字段，并指向实体表的记录。]]></description><category></category></item><item><title><![CDATA[【Raw use of parameterized class ‘xxx‘ 】]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125958504</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125958504</guid><author>Java_Rookie_Xiao</author><pubDate>Sun, 24 Jul 2022 13:53:15 +0800</pubDate><description><![CDATA[Raw use of parameterized class 'xxx' ]]></description><category></category></item><item><title><![CDATA[@RequiredArgsConstructor(onConstructor_ = @Autowired) 出现红色报错]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125633212</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125633212</guid><author>Java_Rookie_Xiao</author><pubDate>Wed, 06 Jul 2022 10:22:48 +0800</pubDate><description><![CDATA[@RequiredArgsConstructor(onConstructor_ = @Autowired) ]]></description><category></category></item><item><title><![CDATA[Java使用MongoTemplate实现多条件、模糊查询、排序、范围、分页查询]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125602833</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125602833</guid><author>Java_Rookie_Xiao</author><pubDate>Mon, 04 Jul 2022 17:17:15 +0800</pubDate><description><![CDATA[MongoTemplate实现复杂条件查询]]></description><category></category></item><item><title><![CDATA[前端镜像源操作]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125588863</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125588863</guid><author>Java_Rookie_Xiao</author><pubDate>Sun, 03 Jul 2022 20:44:34 +0800</pubDate><description><![CDATA[前端配置、查看镜像源]]></description><category></category></item><item><title><![CDATA[Error: error:0308010C:digital envelope routines::unsupported]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125534299</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125534299</guid><author>Java_Rookie_Xiao</author><pubDate>Thu, 30 Jun 2022 09:57:33 +0800</pubDate><description><![CDATA[Error: error:0308010C:digital envelope routines::unsupported]]></description><category></category></item><item><title><![CDATA[Springboot集成Kfaka]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125317089</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/125317089</guid><author>Java_Rookie_Xiao</author><pubDate>Thu, 16 Jun 2022 17:19:48 +0800</pubDate><description><![CDATA[Springboot集成Kafka]]></description><category></category></item><item><title><![CDATA[JSP的九大内置对象介绍]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/84945729</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/84945729</guid><author>Java_Rookie_Xiao</author><pubDate>Mon, 10 Dec 2018 20:21:09 +0800</pubDate><description><![CDATA[1.request：表示HttpServletRequest，它包含了有关浏览器请求的信息，并且还有获取cookie、header、session数据的方法。
2.response：表示HttpServletResponse，提供了几个用于设置返回浏览器的响应的信息（例如：cookies、头信息）
3.page：页面产生的一个Servlet实例
4.pageContext：表示javax.serv...]]></description><category></category></item><item><title><![CDATA[配置Servlet的两种方式]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/84891101</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/84891101</guid><author>Java_Rookie_Xiao</author><pubDate>Sat, 08 Dec 2018 11:44:30 +0800</pubDate><description><![CDATA[1. 方式一、在web.xml文件中配置(传统)
	**web.xml的位置:/Xxx/WebRoot/WEB-INF/web.xml**
	详细配置:
      &amp;amp;lt;servlet&amp;amp;gt;
        &amp;amp;lt;servlet-name&amp;amp;gt;HelloServlet&amp;amp;lt;/servlet-name&amp;amp;gt;
        &amp;amp;lt;servlet-class&amp;amp;gt;co]]></description><category></category></item><item><title><![CDATA[Java连接Oracle数据库]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/83316481</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/83316481</guid><author>Java_Rookie_Xiao</author><pubDate>Tue, 23 Oct 2018 22:14:30 +0800</pubDate><description><![CDATA[先上代码
package utils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/**
 * 连接Oracle数据库
 * @author XiaoYongJun 
 * @date    2018年10月23日 下午9:12:10
 */
public cla...]]></description><category></category></item><item><title><![CDATA[Oracle 约束详解]]></title><link>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/83311335</link><guid>https://blog.youkuaiyun.com/Java_Rookie_Xiao/article/details/83311335</guid><author>Java_Rookie_Xiao</author><pubDate>Tue, 23 Oct 2018 18:13:46 +0800</pubDate><description><![CDATA[(1).约束的分类
1.主键约束:唯一、非空性
2.唯一约束:可以为空，但只能一个
3.检查约束:对数据的格式、范围等加以限制
4.默认约束:当数据不填时，为默认值
5.外键约束:需要建立两表间关系并引用主表的列
(2).在建表后添加约束
a).主键约束 primary key
alter table 表名 add constraint 主键名 primary key 列名
b).唯一约束 uni...]]></description><category></category></item></channel></rss>