大家来帮我看看是什么错误
<%String   xkcode=request.getParameter( "xkcode ");
if(xkcode== "01 ")   response.sendRedirect( "rwx.jsp ");
if(xkcode== "02 ")   response.sendRedirect( "glx.jsp ");
if(xkcode== "03 ")   response.sendRedirect( "wyx.jsp ");
if(xkcode== "04 ")   response.sendRedirect( "sxx.jsp ");
if(xkcode== "05 ")   response.sendRedirect( "wlx.jsp ");
if(xkcode== "06 ")   response.sendRedirect( "swx.jsp ");
if(xkcode== "07 ")   response.sendRedirect( "jdx.jsp ");
if(xkcode== "08 ")   response.sendRedirect( "xkx.jsp ");
if(xkcode== "09 ")   response.sendRedirect( "jsjxy.jsp ");
if(xkcode== "10 ")   response.sendRedirect( "ysx.jsp ");
if(xkcode== "11 ")   response.sendRedirect( "hxx.jsp ");
if(xkcode== "12 ")   response.sendRedirect( "jyx.jsp ");
%>

------解决方案--------------------
String，怎么判断内容相等都不知道么？
------解决方案--------------------
if (xkcode.equals( "... "))
{

}