找不到符号-JSP [英] Cannot find symbol- JSP

问题描述

亲爱的所有人，

我正在编写一段JDBC连接代码.
试试{
连接con = null;
PreparedStatement pstmt = null;
----------
---------
---------
/*在此声明连接*/

}
catch(ex异常)
{
out.println(无法连接");
}
终于{
pstmt.close();
con.close();
}

在这里我收到pstmt和con的错误....找不到符号.
请帮助

Dear All,

I am writing a piece of JDBC connection code.
try{
Connection con=null;
PreparedStatement pstmt=null;
----------
---------
---------
/* Declared the connection here*/

}
catch(Exception ex)
{
out.println("Unable to connect");
}
finally{
pstmt.close();
con.close();
}

Here im getting error for pstmt and con....cannot find symbol.
Kindly help

推荐答案

由于变量pstmt和con在try块内声明，因此它们超出了范围(无法访问).捕获块.
将它们的声明移到try之前.

彼得

Because your variables pstmt and con are declared inside the try block, they are out of scope (cannot be accessed) in the catch block.
Move their declarations before try.

Peter

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