以下的文章主要讲述的是如何在tomcat5中正确配置MySQL数据源,以下的文章我们主要是对tomcat5中正确配置MySQL数据源的实际操作步骤的详细介绍,以下就是文章的具体操作步骤描述。 一、配置MySQL环境变量: softe version:tomcat(一个很好用的JSP运行平台)5.0
以下的文章主要讲述的是如何在tomcat5中正确配置MySQL数据源,以下的文章我们主要是对tomcat5中正确配置MySQL数据源的实际操作步骤的详细介绍,以下就是文章的具体操作步骤描述。
一、配置MySQL环境变量:
softe version:tomcat(一个很好用的JSP运行平台)5.0.12/MySQL(和PHP搭配之最佳组合)4.1.7/MySQL(和PHP搭配之最佳组合)_driver---
MySQL(和PHP搭配之最佳组合)-connector-java-3.1.4-beta-bin.jar
MySQL(和PHP搭配之最佳组合)驱动程序可从www.MySQL(和PHP搭配之最佳组合).com官方网站下载
路径:
tomcat(一个很好用的JSP运行平台)5在d:mywebomcat5;
MySQL(和PHP搭配之最佳组合)在C:Program FilesMySQL(和PHP搭配之最佳组合)MySQL(和PHP搭配之最佳组合) Server 4.1
Path(在原来的基础上加上):
<ol class="dp-xml"> <li class="alt"><span><span>d:mywebomcat5in;d:mywebjdk1.4;d:myweb </span></span></li> <li><span>jdk1.4in; </span></li> <li class="alt"><span>d:mywebomcat5commonlibservlet-api.jar;C:Program Files </span></li> <li>MySQL<span>(和PHP搭配之最佳组合)</span>MySQL<span>(和PHP搭配之最佳组合) Server4.1in </span> </li> <li class="alt"><span>CLASSPATH:d:mywebomcat5commonlibservlet-api.jar;d:myweb </span></li> <li><span>tomcat(一个很好用的JSP运行平台)5commonlibjsp(SUN企业级应用的首选)-api.jar </span></li> <li class="alt"><span>JAVA_HOME:d:mywebjdk1.4 </span></li> <li><span>CATALINA_HOME:d:mywebomcat5 </span></li> </ol>
二、建立测试数据库
在MySQL(和PHP搭配之最佳组合)中建立一个forumdb数据库,同时创建一个表member如下:
<ol class="dp-xml"> <li class="alt"><span><span>create database forumdb; </span></span></li> <li><span>create table member </span></li> <li class="alt"><span>( </span></li> <li><span>id int, </span></li> <li class="alt"><span>name varchar(6) </span></li> <li><span>); </span></li> </ol>
然后插入两条测试数据如下:
<ol class="dp-xml"> <li class="alt"><span><span>insert into member values(1,"zhang"); </span></span></li> <li><span>insert into member values(2,"wang"); </span></li> </ol>
至此,数据库准备完毕。
三、配置server.xml(标准化越来越近了)
注:我的web在d:mywebmyapps
首先要将MySQL(和PHP搭配之最佳组合)的驱动程序放到d:mywebomcat5commonlib下面,一定要放".jar"的文件,如是".zip"的文件直接改为.jar即可。
用文本编辑器打开D:omcat5confserver.xml(标准化越来越近了),找到结束标志,然后在之前加上如下语句:
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span class="tag-name">Context</span><span> </span><span class="attribute">path</span><span>=</span><span class="attribute-value">"/myapps"</span><span> </span><span class="attribute">docBase</span><span>=</span><span class="attribute-value">"d:mywebmyapps"</span><span> </span><span class="attribute">debug</span><span>=</span><span class="attribute-value">"0"</span><span> </span></span></span></li> <li> <span class="attribute">reloadable</span><span>=</span><span class="attribute-value">"true"</span><span> </span><span class="tag">></span><span> </span> </li> <li class="alt"><span class="tag"><span class="tag-name">Resource</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"jdbc/DBConnection"</span><span> </span></span></li> <li> <span class="attribute">auth</span><span>=</span><span class="attribute-value">"Container"</span><span> </span> </li> <li class="alt"> <span class="attribute">type</span><span>=</span><span class="attribute-value">"javax.sql.DataSource"</span><span> </span><span class="tag">/></span><span> </span> </li> <li><span class="tag"><span class="tag-name">ResourceParams</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"jdbc/DBConnection"</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span class="tag"><span class="tag-name">parameter</span><span class="tag">></span><span> </span></span></li> <li><span class="tag"><span class="tag-name">name</span><span class="tag">></span><span>factory</span><span class="tag"></span><span class="tag-name">name</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span class="tag"><span class="tag-name">value</span><span class="tag">></span><span>org.apache(Unix平台最流行的WEB服务器平台).commons.dbcp.BasicDataSourceFactory</span><span class="tag"></span><span class="tag-name">value</span><span class="tag">></span><span> </span></span></li> <li> <span class="tag"></span><span class="tag-name">parameter</span><span class="tag">></span><span> </span> </li> <li class="alt"> <span><!-- Maximum number of dB connections in pool. Make sure you </span></li><li><span> configure your </span>MySQL<span>(和PHP搭配之最佳组合)d max_connections large enough to handle </span></li><li class="alt"><span> all of your db connections. Set to 0 for no limit. </span></li><li><span> --</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"><</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li><span class="tag"><</span><span class="tag-name">name</span><span class="tag">></span><span>maxActive</span><span class="tag"></</span><span class="tag-name">name</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"><</span><span class="tag-name">value</span><span class="tag">></span><span>10</span><span class="tag"></</span><span class="tag-name">value</span><span class="tag">></span><span> </span></li><li><span class="tag"></</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li class="alt"><span><!-- Maximum number of idle dB connections to retain in pool. </span></li><li><span> Set to 0 for no limit. </span></li><li class="alt"><span> --</span><span class="tag">></span><span> </span></li><li><span class="tag"><</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"><</span><span class="tag-name">name</span><span class="tag">></span><span>maxIdle</span><span class="tag"></</span><span class="tag-name">name</span><span class="tag">></span><span> </span></li><li><span class="tag"><</span><span class="tag-name">value</span><span class="tag">></span><span>3</span><span class="tag"></</span><span class="tag-name">value</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"></</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li><span><!-- Maximum time to wait for a dB connection to become available </span></li><li class="alt"><span> in ms, in this example 10 seconds. An Exception is thrown if </span></li><li><span> this timeout is exceeded.Set to -1 to wait indefinitely. </span></li><li class="alt"><span>Maximum time to wait for a dB connection to become available </span></li><li><span> in ms, in this example 10 seconds. An Exception is thrown if </span></li><li class="alt"><span> this timeout is exceeded.Set to -1 to wait indefinitely. </span></li><li><span> --</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"><</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li><span class="tag"><</span><span class="tag-name">name</span><span class="tag">></span><span>maxWait</span><span class="tag"></</span><span class="tag-name">name</span><span class="tag">></span><span> </span></li><li class="alt"><span class="tag"><</span><span class="tag-name">value</span><span class="tag">></span><span>10000</span><span class="tag"></</span><span class="tag-name">value</span><span class="tag">></span><span> </span></li><li><span class="tag"></</span><span class="tag-name">parameter</span><span class="tag">></span><span> </span></li><li class="alt"><span class="comments"><!-- MySQL(和PHP搭配之最佳组合) dB username and password for dB connections--></span><span> </span> </li> <li><span class="tag"><span class="tag-name">parameter</span><span class="tag">></span><span> </span></span></li> <li class="alt"> <span> </span><span class="tag"><span class="tag-name">name</span><span class="tag">></span><span>username</span><span class="tag"></span><span class="tag-name">name</span><span class="tag">></span><span> </span></span> </li> <li> <span> </span><span class="tag"><span class="tag-name">value</span><span class="tag">></span><span>root</span><span class="tag"></span><span class="tag-name">value</span><span class="tag">></span><span> </span></span> </li> <li class="alt"> <span class="tag"></span><span class="tag-name">parameter</span><span class="tag">></span><span> </span> </li> <li><span class="tag"><span class="tag-name">parameter</span><span class="tag">></span><span> </span></span></li> <li class="alt"> <span> </span><span class="tag"><span class="tag-name">name</span><span class="tag">></span><span>password</span><span class="tag"></span><span class="tag-name">name</span><span class="tag">></span><span> </span></span> </li> <li> <span> </span><span class="tag"><span class="tag-name">value</span><span class="tag">></span><span>1234</span><span class="tag"></span><span class="tag-name">value</span><span class="tag">></span><span> </span></span> </li> <li class="alt"> <span class="tag"></span><span class="tag-name">parameter</span><span class="tag">></span><span> </span> </li> <li> <span class="comments"><!-- Class name for mm.MySQL(和PHP搭配之最佳组合) JDBC driver --></span><span> </span> </li> <li class="alt"><span class="tag"><span class="tag-name">parameter</span><span class="tag">></span><span> </span></span></li> <li> <span> </span><span class="tag"><span class="tag-name">name</span><span class="tag">></span><span>driverClassName</span><span class="tag"></span><span class="tag-name">name</span><span class="tag">></span><span> </span></span> </li> <li class="alt"> <span> </span><span class="tag"><span class="tag-name">value</span><span class="tag">></span><span>com.</span>MySQL<span>(和PHP搭配之最佳组合).jdbc.Driver</span><span class="tag"></span><span class="tag-name">value</span><span class="tag">></span><span> </span></span> </li> <li> <span class="tag"></span><span class="tag-name">parameter</span><span class="tag">></span><span> </span> </li> <li class="alt"><span></span></li> </ol>

InnoDBBufferPool通过缓存数据和索引页来减少磁盘I/O,提升数据库性能。其工作原理包括:1.数据读取:从BufferPool中读取数据;2.数据写入:修改数据后写入BufferPool并定期刷新到磁盘;3.缓存管理:使用LRU算法管理缓存页;4.预读机制:提前加载相邻数据页。通过调整BufferPool大小和使用多个实例,可以优化数据库性能。

MySQL与其他编程语言相比,主要用于存储和管理数据,而其他语言如Python、Java、C 则用于逻辑处理和应用开发。 MySQL以其高性能、可扩展性和跨平台支持着称,适合数据管理需求,而其他语言在各自领域如数据分析、企业应用和系统编程中各有优势。

MySQL值得学习,因为它是强大的开源数据库管理系统,适用于数据存储、管理和分析。1)MySQL是关系型数据库,使用SQL操作数据,适合结构化数据管理。2)SQL语言是与MySQL交互的关键,支持CRUD操作。3)MySQL的工作原理包括客户端/服务器架构、存储引擎和查询优化器。4)基本用法包括创建数据库和表,高级用法涉及使用JOIN连接表。5)常见错误包括语法错误和权限问题,调试技巧包括检查语法和使用EXPLAIN命令。6)性能优化涉及使用索引、优化SQL语句和定期维护数据库。

MySQL适合初学者学习数据库技能。1.安装MySQL服务器和客户端工具。2.理解基本SQL查询,如SELECT。3.掌握数据操作:创建表、插入、更新、删除数据。4.学习高级技巧:子查询和窗口函数。5.调试和优化:检查语法、使用索引、避免SELECT*,并使用LIMIT。

MySQL通过表结构和SQL查询高效管理结构化数据,并通过外键实现表间关系。1.创建表时定义数据格式和类型。2.使用外键建立表间关系。3.通过索引和查询优化提高性能。4.定期备份和监控数据库确保数据安全和性能优化。

MySQL是一个开源的关系型数据库管理系统,广泛应用于Web开发。它的关键特性包括:1.支持多种存储引擎,如InnoDB和MyISAM,适用于不同场景;2.提供主从复制功能,利于负载均衡和数据备份;3.通过查询优化和索引使用提高查询效率。

SQL用于与MySQL数据库交互,实现数据的增、删、改、查及数据库设计。1)SQL通过SELECT、INSERT、UPDATE、DELETE语句进行数据操作;2)使用CREATE、ALTER、DROP语句进行数据库设计和管理;3)复杂查询和数据分析通过SQL实现,提升业务决策效率。

MySQL的基本操作包括创建数据库、表格,及使用SQL进行数据的CRUD操作。1.创建数据库:CREATEDATABASEmy_first_db;2.创建表格:CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY,titleVARCHAR(100)NOTNULL,authorVARCHAR(100)NOTNULL,published_yearINT);3.插入数据:INSERTINTObooks(title,author,published_year)VA


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