Apache Tomcat/6.0.39如何配置连接mysql，JDBC:mysql-connector-java-5.1.30-bin.jar-成功连接心得...

http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html

前提：开启TOMCAT,MYsql

MySQL DBCP Example
0. Introduction

Versions of MySQL and JDBC drivers that have been reported to work:

MySQL 3.23.47, MySQL 3.23.47 using InnoDB,, MySQL 3.23.58, MySQL 4.0.1alpha
Connector/J 3.0.11-stable (the official JDBC Driver)
mm.mysql 2.0.14 (an old 3rd party JDBC Driver)
Before you proceed, don't forget to copy the JDBC Driver's jar into $CATALINA_HOME/lib.

这句话的意思是说，在开始下面的工作之前必须将JDBC驱动jar包(我用的是mysql-connector-java-5.1.30-bin.jar)，放到G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39/lib目录下，另外我自己昨天捣鼓的时候设置过一些环境变量，不知道会不会有影响，通过下面的测试发现，没有影响。（我的环境变量CATALINA_HOME值设置为G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39）

1. MySQL configuration

Ensure that you follow these instructions as variations can cause problems.

Create a new test user, a new database and a single test table. Your MySQL user must have a password assigned. The driver will fail if you try to connect with an empty password.

mysql> GRANT ALL PRIVILEGES ON *.* TO javauser@localhost
-> IDENTIFIED BY 'javadude' WITH GRANT OPTION;
mysql> create database javatest;
mysql> use javatest;
mysql> create table testdata (
-> id int not null auto_increment primary key,
-> foo varchar(25),
-> bar int);

Note: the above user should be removed once testing is complete!
Next insert some test data into the testdata table.

mysql> insert into testdata values(null, 'hello', 12345);
Query OK, 1 row affected (0.00 sec)

mysql> select * from testdata;
+----+-------+-------+
| ID | FOO | BAR |
+----+-------+-------+
| 1 | hello | 12345 |
+----+-------+-------+
1 row in set (0.00 sec)

mysql>

2. Context configuration

Configure the JNDI DataSource in Tomcat by adding a declaration for your resource to your Context.

For example:

context.xml在G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39\conf目录下（我的笔记本上）

maxActive="100" maxIdle="30" maxWait="10000"
username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"

url="jdbc:mysql://localhost:3306/javatest"/>

经过再三测试还是要3306才对

3. web.xml configuration

 

Now create a WEB-INF/web.xml for this test application.

这里原文说的不是很明确，具体操作是在TestDB目录下新建WEB-INF，然后新建web.xml，添加下面的内容。

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
MySQL Test App

DB Connection
jdbc/TestDB
javax.sql.DataSource
Container

4. Test code

Now create a simple test.jsp page for use later.

在TestDB目录下新建test.jsp,添加下面的内容

<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

select id, foo, bar from testdata

Results

Foo ${row.foo}

Bar ${row.bar}

That JSP page makes use of JSTL's SQL and Core taglibs. You can get it from Apache Tomcat Taglibs - Standard Tag Library project — just make sure you get a 1.1.x release. Once you have JSTL, （解压后在\jakarta-taglibs-standard-1.1.1\lib）copy jstl.jar and standard.jar to your web app's WEB-INF/lib directory.

Once deployed, point a browser at http://localhost:8080/DBTest/test.jsp to view the fruits of your hard work.

转载于:https://www.cnblogs.com/yuhuameng/p/3729791.html