<datasources> <local-tx-datasource> <jndi-name>test</jndi-name> <connection-url>jdbc:mysql://127.0.0.1:3306/test</connection-url><!?test为数据库名--> <driver-class>com.mysql.jdbc.Driver</driver-class> <user-name>root</user-name><!?用户名以下相同--> <password>xxxxxxxx</password><!?密码以下相同--> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> <!-- should only be used on drivers after 3.22.1 with "ping" support <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> --> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> <metadata> <type-mapping>mySQL</type-mapping> </metadata> </local-tx-datasource> </datasources> 这个是jboss的连接池方法建连接。 驱动:com.mysql.jdbc.Driver
<datasources>
<local-tx-datasource>
<jndi-name>test</jndi-name>
<connection-url>jdbc:mysql://127.0.0.1:3306/test</connection-url><!?test为数据库名--> <driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name><!?用户名以下相同-->
<password>xxxxxxxx</password><!?密码以下相同--> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
<!-- should only be used on drivers after 3.22.1 with "ping" support
<valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>
-->
<!-- sql to call when connection is created
<new-connection-sql>some arbitrary sql</new-connection-sql>
-->
<!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers
<check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
--> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
<metadata>
<type-mapping>mySQL</type-mapping>
</metadata>
</local-tx-datasource>
</datasources>
这个是jboss的连接池方法建连接。
驱动:com.mysql.jdbc.Driver
你可以从http://www.worldserver.com/mm.mysql/下载最新的驱动程序
本文只是简单描述一下mm.mysql的安装和使用
安装
1、下载mm.mysql
2、解压到某驱动器,如c:
3、修改classpath,加入mm.mysql的路径,如你原来的classpath可能是:
.;c:jdk1.2.2lib ools.jar;c:jdk1.2.2libdt.jar;
修改后可能是
.;c:jdk1.2.2lib ools.jar;c:jdk1.2.2libdt.jar;C:mm.mysql.jdbc-2.0pre5; 编程 1、用DriverManager登记mm.mysql
mm.mysql的class名为org.gjt.mm.mysql.Driver,登记时必须写成
Class.forName("org.gjt.mm.mysql.Driver").newInstance(); 2、jdbc url参数说明
url格式:jdbc:mysql://[hostname][:port]/dbname[?param1=value1][¶m2=value2]...
参数名 取值 缺省
user 数据库用户名 无
password 数据库用户口令 无
autoReconnect 当数据库连接丢失时是否自动连接,取值true/false false
maxReconnects 如果autoReconnect为true,此参数为重试次数,缺省为3次 3
initialTimeout 如果autoReconnect为true,此参数为重新连接前等待的秒数 2
maxRows 设置查询时返回的行数,0表示全部 0
useUnicode 是否使用unicode输出,true/false false
characterEncoding 如果useUnicode,该参数制定encoding类型,建议使用8859_1 无 提示
同时使用useUnicode,characterEncoding,能解决数据库输出时的中文问题
如:jdbc:mysql://localhost/test?user=root&useUnicode=true;characterEncoding=8859_1 实际例子,举一个简单的例子
这个jsp例子使用一个库,该库只有一个表(地址簿) create database addressbook
use addressbook
create table addressbook (id int auto_increment primary key,name varchar(30),address varchar(255),phone varchar(20)); 插入记录
insert into addressbook (name,address,phone) values (jjx,zhejiang yuyao,0574-2222222); jsp代码:代码中使用了absolute,ResultSet.TYPE_SCROOL_SENSITIVE等的目录是为了测试mm.mysql是否符合jdbc 2.0的规范
<%@ page import="java.sql.*" %>
<%
out.println("通讯录!"); try {
Class.forName("org.gjt.mm.mysql.Driver").newInstance(); }
catch (Exception E) {
out.println("Unable to load driver."); } try {
Connection C = DriverManager.getConnection("jdbc:mysql://localhost/addressbook?user=root&password=jjx&useUnicode=true&characterEncoding=8859_1");
Statement s=C.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
ResultSet rs=s.executeQuery("select * from addressbook");
out.println("<table border=1>");
int i=1;
for (i=10;i<20;i++)
{
if (rs.absolute(i))
{
out.println("<tr><td>");
out.println(rs.getString(1));
out.println("</td>");
out.println("<td>");
out.print(rs.getString(2));
out.println("</td>");
out.println("<td>");
out.print(rs.getString(3));
out.println("</td></tr>");
}
else
{
break;
} }
out.println("</table>");
rs.close();
s.close();
C.close();
}
catch (SQLException E) {
out.println("SQLException: " + E.getMessage());
out.println("SQLState: " + E.getSQLState());
out.println("VendorError: " + E.getErrorCode());
} %>