奇怪奇怪真奇怪

[cyberleon]

if(request.getParameter("password")==r.getString("colPassword"))
{
out.println("yes");
}
else
{
out.println("no");
}

这段代码无论如何都显示no
即使
out.println(r.getString("colPassword"));
out.println(request.getParameter("password"));
输出的两个字符串是相同的，结果还是no

怎么回事儿呢？

[Andrawu]

if(request.getParameter("password").equals(r.getString("colPassword")))
{
out.println("yes");
}
else
{
out.println("no");
}

[zijianyi]

字符串比较不能用== 用equals或者compareTo