小编Rik*_*ik 的帖子

如果我有多个具有相同表和列的数据库，我如何使用 Java 中的单个查询从这些数据库中检索数据。为单个数据库完成此操作，我是 Java 新手，请提出建议。

public class MultipleDBTest{
   public void dbConnect(String db_connect_string, String db_userid, String db_password){
     try{
       Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
       Connection conn = DriverManager.getConnection(db_connect_string, db_userid, db_password);
       System.out.println("connected");
       Statement statement = conn.createStatement();
       String queryString = "select <Col1>, <Col2> from <Table>";
       ResultSet rs = statement.executeQuery(queryString);
        while(rs.next()){
          System.out.println(rs.getString(1) + " | " + rs.getString(2));
        }
      }
      catch(Exception e){
        e.printStackTrace();
      }
  }

  public static void main(String[] args){
    ConnectMSSQLServer connServer = new ConnectMSSQLServer();
    connServer.dbConnect("jdbc:sqlserver://localhost;databaseName=<Database1>","<Username>","<Password>");
  }
}

我在我的代码中面临问题.它在IE8中出现javascript错误,

"SCRIPT1028: Expected identifier, string or number"  

我的代码,

<cfoutput>
<cfif iPro eq "M">
<cfset iIdLock = #DecryptX(iId)#>`

<script>
window.onbeforeunload = function(){
    var hook = true;
    if(hook){
        var r="#iIdLock#";
       $.ajax({                     
           type:'POST',
           async:false,
           url:"setlock.cfm",
           data:"s="+r,
           success: function(){},
           error: function(){},
        });
    }
}
</script>

</cfif>
</cfoutput>

可能是什么问题？

当我尝试在index.cfm中触发简单的select查询时,使用Application.cfc中定义的数据源会显示错误消息.任何人都可以帮助我正确的代码序列？

错误:

变量PRIMARYDATASOURCE未定义

的Application.cfc

<cfcomponent>

    <!--- Set up the application. --->
    <cfscript>
        this.name = ""; // app name from old cfapplication tag
        this.sessionManagement = "Yes";
        this.loginstorage="session";
        this.setClientCookies = "Yes";
        this.primarydatasource = "diet";
        application.PRIMARYDATASOURCE = "diet";
    </cfscript>

    <cfsetting requesttimeout="100000" />

    <cffunction name="onApplicationStart">
            ....

        <cfquery datasource="#application.PRIMARYDATASOURCE#" name="getCostDetails">
            select * from maimun.adCostDetails ORDER BY ID DESC
        </cfquery>
            ....
    </cffunction>

</cfcomponent>