struts1.2 与struts1.1数据源的配置

原文链接 http://club.yc.nx.cn/blog/user1/xxyipt/archives/2007/1780.html

  一、下载必要的jar包。有四个包要下载（网上有贴子说只要下面前三个包就可以了，但我在配置的时候如果没有第四个包会报错）。
      http://apache.linuxforum.net/dist/jakarta/commons/dbcp/binaries/commons-dbcp-1.2.zip
     http://apache.linuxforum.net/dist/jakarta/commons/pool/binaries/commons-pool-1.2.zip
     http://apache.linuxforum.net/dist/jakarta/struts/struts-legacy/struts-legacy-1.0.zip
      http://apache.linuxforum.net/dist/jakarta/commons/collections/binaries/commons-collections-3.1.zip
    把这四个jar包放到web应用的WEB-INF/lib目录下，还有要把mySQL的驱动程序包也放到这里（也可以把数据库的驱动包放到%Tomcat_Home%/common/lib目录下或%Resin_Home%/lib目录下，这样在启动Web服务器的时候就会加载这个包，服务器和Web应用都可以使用驱动程序类）

二、在struts-config.xml中添加Data Source

xml 代码

 < data-sources >
      < data-source   key = "datasource"   type = "org.apache.commons.dbcp.BasicDataSource" >
        < set-property   property = "password"   value = "admin"   />
        < set-property   property = "minCount"   value = "3"   />
        < set-property   property = "maxCount"   value = "10"   />
        < set-property   property = "username"   value = "admin"   />
        < set-property   property = "driverClassName"   value = "/blog/com.mysql.jdbc.Driver"   />
        < set-property   property = "description"   value = "test"   />
        < set-property   property = "url"   value = "jdbc:mysql://localhost/test"   />
        < set-property   property = "readOnly"   value = "false"   />
        < set-property   property = "autoCommit"   value = "true"   />
      data-source >
    data-sources >

如果要配置多个data source，可以给每个data source指定不同的key，然后在程序中根据key指定要引用的数据源。

三、测试数据源。配置好以后就可以在ActionServlet中使用了

java 代码

 DataSource ds = getDataSource(request, "datasource" );
   Connection conn = ds.getConnection();
   Statement stmt = conn.createStatement();
   ResultSet rs = stmt.executeQuery( "SQL String" );

附： Struts1.1中struts-config.xml的配置：

xml 代码

 < data-sources   >
      < data-source   key = "datasource"   type = "org.apache.struts.util.GenericDataSource" >
        < set-property   property = "password"   value = "admin"   />
        < set-property   property = "minCount"   value = "2"   />
        < set-property   property = "maxCount"   value = "10"   />
        < set-property   property = "user"   value = "admin"   />
        < set-property   property = "driverClass"   value = "/blog/com.mysql.jdbc.Driver"   />
        < set-property   property = "description"   value = "test"   />
        < set-property   property = "url"   value = "jdbc:mysql://localhost/test"   />
        < set-property   property = "readOnly"   value = "false"   />
        < set-property   property = "autoCommit"   value = "true"   />
      data-source >
    data-sources >

注意：1.2和1.1在配置上不一样的地方

 < data-source   key = "datasource"   type = "org.apache.commons.dbcp.BasicDataSource" >
 < set-property   property = "username"   value = "admin"   />
 < set-property   property = "driverClassName"   value = "/blog/com.mysql.jdbc.Driver"   />