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如何调用struts-config.xml中配置的data-source

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Release: 2016-06-07 17:03:16
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在struts-config.xml中配置data-source注意事项:lt;data-sourcesgt;lt;!--名称:data-source描述:data-source元素定义了具体

在struts-config.xml中配置data-source注意事项:

  
  
   
        value="Oracle.jdbc.driver.OracleDriver" />
       value="jdbc:oracle:thin:@localhost:1521:orcl" />
   
   
   
   
   
   
   
  

 

在**DAO文件中代码:
首先定义
private DataSource dataSource;
该类的构造方法:
public **DAO(DataSource dataSource)
{
this.dataSource=dataSource;
}
然后在该类的方法中使用dataSource.getConnection()方法获得连接。
一定要注意千万不要使用静态方法


在action类中调用配置的datasource时有一下两种方法:
方法一:ServletContext context = servlet.getServletContext();//获得Struts中的配置文件属性
        DataSource dataSource = (DataSource) context.getAttribute("dataSource");

方法二:DataSource ds=this.getDataSource(request, "dataSource");
**DAO **dao=new **DAO(ds);

getDataSource(HttpServletRequest request,String key)方法就是在action中调用你配置好的data-source而已

当然,方法中的参数key,就是你配置的的key

可以比较方法二比较简洁哦!费了好大功夫才搞出来的,呼呼·····

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