结果设置资源泄漏，即使我关闭了RS？

Question

我越来越'资源泄漏：'rsHP'没有关闭在这个位置'我到处使用rsHP = stmt.executeQuery（查询）;

这里是什么这个方法做了基本的布局...

public static void method(String x, Connection conn){ 
Statement stmtHP = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, 
        ResultSet.CONCUR_UPDATABLE); 
ResultSet rsHP = null; 

try{ 
     ----ALGORITHM IN HERE------ 
     ****This is the general form of this method***** 

     queryHP = "select * from SOMETABLE where SOMETHING = 'blah'"; 
     rsHP = stmtHP.executeQuery(queryHP); 

     while(rsHP.next()){ 
      List.add(rsHP.getString("COLNAME")); 
     } 
      . 
      . 
     repeats for 8 different queries 
      . 
      . 
     queryHP = "select * from SOMEOTHERTABLE where SOMETHINGELSE = 'blah2'"; 
     rsHP = stmtHP.executeQuery(queryHP); 

     while(rsHP.next()){ 
      List.add(rsHP.getString("NEWCOLNAME")); 
     } 

}catch(Exception e){ 
     System.out.println("Hey dumbo you suck, Exception Found"); 
     rsHP.close(); 
     stmtHP.close(); 
     conn.close(); 
}finally{ 
     rsHP.close(); 
     stmtHP.close(); 
     // connection gets closed later if no exceptions thrown 
} 

}// end method 

在这里就结束了，我清楚地关闭我所有的东西。我很困惑，如果我的方法在抛出一个错误之外不关闭RS而终止字面上不可能发生内存泄漏。

Answer 1

Connection#createStatement()抛出一个SQLException，因此此代码根本无法编译。

我建议你改变方法的签名

public static void method(String x, Connection conn) throws SQLException 

---

对于资源泄漏，我想使用下面的逻辑会帮助你

try{ 
    // code 
    rsHP.close(); 
    conn.close(); 
}catch(Exception e){ 
    // StackTrace 
}finally{ 
    if (rsHP != null) rsHP.close(); 
    if (conn != null) conn.close(); 
}